TOHOKU UNIVERSITY Researchers

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Shin Saito

Section

Graduate School of Engineering

Job title

Professor

Degree

博士（工学）（東北大学）
修士（工学）（東北大学）

researchmap

https://researchmap.jp/read0055280

J-GLOBAL ID

200901094428446510

Research History 4

2015/04 - Present

Graduate School of Engineering, Tohoku University　Professor
2007/04 - 2015/03

Graduate School of Engineering, Tohoku University　Associate Professor
2002/04 - 2007/03

Graduate School of Engineering, Tohoku University　Assistant Professor
1999/04 - 2002/03

東北大学大学院工学研究科　日本学術振興会特別研究員(PD)

Education 2

Tohoku University　Graduate School, Division of Engineering　Electronic Engineering

- 1999/03/25
Tohoku University　Faculty of Engineering　電子工学科

- 1994/03/25

Committee Memberships 52

The International Symposium on Advanced Magnetic Materials and Applications (ISAMMA)　Steering comittiee member

2016/12 - Present
The International Symposium on Advanced Magnetic Materials and Applications (ISAMMA)　Steering comittiee member

2016/12 - Present
文部科学省科学技術・学術政策研究所科学技術動向研究センター　専門調査員

2014/04 - Present
文部科学省科学技術・学術政策研究所科学技術動向研究センター　専門調査員

2014/04 - Present
日本学術振興会アモルファス・ナノ材料第147委員会　第3分科会幹事

2013/06 - Present
日本学術振興会アモルファス・ナノ材料第147委員会　第3分科会幹事

2013/06 - Present
日本学術振興会薄膜第131委員会　企画委員

2012/05 - Present
日本学術振興会薄膜第131委員会　企画委員

2012/05 - Present
16th Magnetics and Optics Research International Symposium (MORIS2018)　実行委員会プログラム副委員長

2016/12 - 2018/03
16th Magnetics and Optics Research International Symposium (MORIS2018)　実行委員会プログラム副委員長

2016/12 - 2018/03
IEEE Magnetics Society Sendai-Sapporo Joint Chapter　Chair

2017/01 - 2017/12
IEEE Magnetics Society Sendai-Sapporo Joint Chapter　Chair

2017/01 - 2017/12
The 28th Magnetic Recording Conference (TMRC2017)　Publicity Chair

2016/12 - 2017/12
The 28th Magnetic Recording Conference (TMRC2017)　Publicity Chair

2016/12 - 2017/12
東北大学電気通信研究所工学研究会スピニクス研究会　主査

2016/04 - 2017/03
東北大学電気通信研究所工学研究会スピニクス研究会　主査

2016/04 - 2017/03
日本学術振興会科学研究費委員会　専門委員

2015/12 - 2016/11
日本学術振興会科学研究費委員会　専門委員

2015/12 - 2016/11
15th Magnetics and Optics Research International Symposium (MORIS2015)　実行委員会プログラム副委員長

2014/12 - 2016/03
15th Magnetics and Optics Research International Symposium (MORIS2015)　実行委員会プログラム副委員長

2014/12 - 2016/03
14th Magnetics and Optics Research International Symposium (MORIS 2013)　実行委員会プログラム部会委員

2013/05 - 2014/03
14th Magnetics and Optics Research International Symposium (MORIS2013)　実行委員会プログラム委員

2013/05 - 2014/03
14th Magnetics and Optics Research International Symposium (MORIS 2013)　実行委員会プログラム部会委員

2013/05 - 2014/03
14th Magnetics and Optics Research International Symposium (MORIS2013)　実行委員会プログラム委員

2013/05 - 2014/03
Magnetics Society of Japan　論文賞・学術奨励賞選考委員

2011/05 - 2013/04
日本磁気学会　論文賞・学術奨励賞選考委員

2011/05 - 2013/04
The 19th International Conference on Magnetism (ICM2012)　Program committee

2010/09 - 2012/07
The 19th International Conference on Magnetism (ICM2012)　プログラム委員

2010/09 - 2012/07
日本真空協会　第52回真空に関する連合講演会プログラム委員

2011/01 - 2011/12
IEEE Magnetics Society Sendai Chapter　Vice Chair

2011/01 - 2011/12
日本真空協会　第52回真空に関する連合講演会プログラム委員

2011/01 - 2011/12
IEEE Magnetics Society Sendai Chapter　Vice Chair

2011/01 - 2011/12
13th Magnetics and Optics Research International Symposium (13th MORIS)　実行委員会プログラム部会委員

2010/04 - 2011/12
13th Magnetics and Optics Research International Symposium (13th MORIS)　実行委員会プログラム部会委員

2010/04 - 2011/12
Magnetic society of Japan　第35回学術講演会(新潟) 実行委員

2010/12 - 2011/09
日本磁気学会　第35回学術講演会(新潟) 実行委員

2010/12 - 2011/09
日本学術振興会磁気記録第144委員会　委員

2006/08 - 2011/09
日本学術振興会磁気記録第144委員会　委員

2006/08 - 2011/09
東北大学電気通信研究所工学研究会スピニクス研究会　幹事

2010/04 - 2011/03
東北大学電気通信研究所工学研究会スピニクス研究会　幹事

2010/04 - 2011/03
The 2nd International Symposium on Advanced Magnetic Materials and Applications (ISAMMA2010)　実行委員

2009/04 - 2011/03
第2回先端磁性材料と応用に関する国際シンポジウム (ISAMMA2010)　実行委員

2009/04 - 2011/03
International Conference of Asian Union of Magnetic Society 2010 (ICAUMS2010)　Program committee

2010/03 - 2010/12
International Conference of Asian Union of Magnetic Society 2010 (ICAUMS2010)　プログラム委員

2010/03 - 2010/12
日本学術振興会科学研究費委員会　専門委員

2008/12 - 2010/11
日本学術振興会科学研究費委員会　専門委員

2008/12 - 2010/11
日本真空協会　第50回真空に関する連合講演会プログラム委員

2009/01 - 2009/12
日本真空協会　第50回真空に関する連合講演会プログラム委員

2009/01 - 2009/12
Magnetic society of Japan　第32回学術講演会(仙台) 実行委員

2007/12 - 2008/09
日本磁気学会　第32回学術講演会(仙台) 実行委員

2007/12 - 2008/09
東北大学電気通信研究所工学研究会スピニクス研究会　幹事

2003/04 - 2004/03
東北大学電気通信研究所工学研究会スピニクス研究会　幹事

2003/04 - 2004/03

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Professional Memberships 2

IEEE Magnetics Society
Magnetics society of Japan

Research Interests 4

magneto-optical microscope
magneto-optical effect
magnetic recording media
magnetic thin film

Research Areas 1

Manufacturing technology (mechanical, electrical/electronic, chemical engineering) / Electric/electronic material engineering /

Awards 18

Best Poster Award of Magnetics and Optics Research International Symposium (MORIS) 2018

2018/01　Steering Committee Chair & Program Committee Co-Chairs of MORIS 2018　EFFECT OF UTILIZING MULTIPLE OXIDES ON MAGNETIC PROPERTIES AND MICROSTRUCTURE OF CoPt-B₂O₃ GRANULAR MEDIA
平成29年度「科研費」審査員の表彰

2017/09/29　独立行政法人日本学術振興会　第１段審査（書面審査）委員の表彰
日本磁気学会新技術・新製品賞

2017/09/20　公益社団法人日本磁気学会　「プローバ装置用磁区観察ユニットBH-753」の開発
日本磁気学会論文賞

2017/09　公益社団法人日本磁気学会　Effective damping factor for CoPtCr-SiO₂ perpendicular magnetic recording medium with partially switched magnetic domains
Magnetic Society of Japan Outstanding Research Award

2015/09/09　公益社団法人日本磁気学会　ナノ磁性薄膜の基本物性解析に基づく磁気記録用磁性膜の高性能化に関する研究
日本磁気学会論文賞

2013/09/04　公益社団法人日本磁気学会　Thermally Assisted Magnetic Recording Applying Optical Near Field with Ultra Short-Time Heating
2012年度貴金属に関わる研究助成金制度ゴールド賞

2013/03/28　TANAKAホールディングス株式会社　貴金属を含む合金薄膜の稠密面原子積層による一軸性のイノベーションと磁気ストレージデバイスへの展開
2013 Joint MMM-INTERMAG Conference, BEST POSTER PRESENTATION AWARD

2013/01/15　The steering committee of the 2013 Joint MMM-INTERMAG Conference　Uniaxial magnetocrystalline anisotropy for hcp Co-Pt disordered alloy films by reducing the stacking faults with adding third element based on valence electron engineering
日本磁気学会論文賞

2011/09/28　公益社団法人日本磁気学会　μmスポットレーザ光による磁性体ナノドット配列体のファラデー効果の評価
ISAMMA2010 Best poster presentation award

2010/07/16　Organizing committee of the 2nd International Symposium on Advanced Magnetic Materials and Applications　Quantitative evaluation of interlayer ferromagnetic coupling between granular and cap layers for perpendicular recording media
情報ストレージ研究推進機構(SRC) 論文賞 2009

2010/06/02　情報ストレージ研究推進機構(SRC)　対象論文: Journal of Physics D: Applied Physics, 42, 145007 (2009). "Semi-quantitative evaluation of stacking faults in pseudo-hcp thin films by laboratory-scale in-plane x-ray diffraction"
2010 Joint MMM-INTERMAG Conference, BEST POSTER PRESENTATION AWARD

2010/01/20　The steering committee of the 2010 Joint MMM-INTERMAG Conference　Probing magneto-optical properties of non-magnetic metals in Kretschmann configuration
平成19年度石田(實)記念財団研究奨励賞

2007/10/26　財団法人石田(實)記念財団　垂直磁気記録媒体用Ru中間層の代替材料の発見
日本応用磁気学会新技術・新製品賞

2005/09/20　社団法人日本応用磁気学会　Kerr効果顕微鏡 BH-78シリーズ
日本応用磁気学会学術奨励賞 (内山賞)

2004/09/22　社団法人日本応用磁気学会　Ti下地、Tiキャップ層を用いたCoCr系ポストアニール媒体における磁性結晶粒の磁気的孤立化
青葉工学振興会第9回研究奨励賞

2003/12/10　財団法人青葉工学振興会　CoCr基垂直磁気記録媒体の磁気特性評価法ならびに材料・プロセス設計法の提案
金属研究助成会第43回原田研究奨励賞

2003/10/31　財団法人金属研究助成会　CoCr系垂直磁気記録媒体の材料評価法の提案と記録層成長制御による初期層の排除
平成14年度日本応用磁気学会優秀講演賞

2002/11/06　社団法人日本応用磁気学会　高角型比・高規格化保磁力CoCr基垂直磁気記録媒体の材料設計

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Papers 169

Proposal of network-shaped upheaval structure using grain boundary diffusion in underlayer for L1₀ FePt-based granular media with columnar nanostructure Peer-reviewed

A. Shimizu, S. Hinata, S. Jo, S. Saito

Transaction of the Magnetics Society of Japan Special Issues　3　(1)　7-11　2019/07

DOI： 10.20819/msjtmsj.19TR302 　
MgO/bcc-CrMn積層下地層の表面形態とその上に成膜したFePt薄膜の磁気特性

齊藤節, 清水章弘, 斉藤伸

電子情報通信学会技術報告　MRIS2019-6　(2019-06)　27-31　2019/06
Near-Infrared Magneto-Refractive Effect for Antiferro-Magnetically Exchange Coupled Co/Ru Multilayer Film in Transmission Configuration Peer-reviewed

S. Saito, H. Sato, K. Ooki, K. Akahane, H. Uchida

Journal of the Magnetics Society of Japan　43　(2)　25-28　2019/03

DOI： 10.3379/msjmag.1903R003 　
Structure and magnetism of c-plane oriented Mn₅₀(Te_50-xSb_x) epitaxial thin films with NiAs-type structure Peer-reviewed

Y. Ashizawa, S. Saito, M. Tsunoda, M. Takahashi

Journal of the Magnetics Society of Japan　43　(2)　21-24　2019/03

DOI： 10.3379/msjmag.1903R002 　
Challenge to the synthesis of α”-(Fe, Co)₁₆N₂ nanoparticles obtained by hydrogen reduction and subsequent nitrogenation starting from α-(Fe, Co)OOH Peer-reviewed

Masahiro Tobise, Shin Saito, Masaaki Doi

AIP Advances　9　(3)　035233-1-035233-5　2019/03
Publisher: AIP Publishing
DOI： 10.1063/1.5079990 　

eISSN： 2158-3226
The network-shaped upheaval structure in (002) textured MgO layer for L1₀ FePt-based granular media with columnar nanostructure Peer-reviewed

Akihiro Shimizu, Shintaro Hinata, SeongJae Jeon, Shin Jo, Shin Saito

IEEE Transactions on Magnetics　55　(7)　3200208-1-3200208-8　2019/03

DOI： 10.1109/TMAG.2019.2906254 　
Proposal of granular-type cap layer with high K_u CoPt grains and ferromagnetic oxide grain boundaries for full granular media Peer-reviewed

Kim Kong Tham, Ryosuke Kushibiki, Tomonari Kamada, Shin Saito

IEEE Transactions on Magnetics　55　(7)　3200305-1-3200305-5　2019/02

DOI： 10.1109/TMAG.2019.2893257 　
Enhancement of NIR magneto-optical effect by surface plasmon resonance －Kerr and magneto-refractive effects for Co/Ru multilayer film－ Invited

Shin Saito

23-28　2018/11
垂直磁気記録媒体用コンポジットターゲットとCoPt-酸化物グラニュラ膜

タムキムコング, 櫛引了輔, 斉藤伸

電気学会マグネティックス研究会資料　MAG-98-118　87-92　2018/11
Ion Implantation Induced Disorder in FePt-C Thin Films Peer-reviewed

Durgesh Kumar, Surbhi Gupta, Tham Kim Kong, R. Nongjai, Shin Saito, K. Asokan, S. N. Piramanayagam

IEEE Transactions on Magnetics　55　(3)　2300805-1-2300805-4　2018/09

DOI： 10.1109/TMAG.2018.2867912 　
Effects of utilizing a granular nucleation layer on magnetic properties and microstructure of CoPt– B₂O₃ granular medium Peer-reviewed

Kim Kong Tham, Ryosuke Kushibiki, Tomonari Kamada, Shintaro Hinata, Shin Saito

Japanese Journal of Applied Physics　57　(9S2)　09TE01-1-09TE01-4　2018/08

DOI： 10.7567/JJAP.57.09TE01 　
Low-pressure Deposition of CoPtCr-SiO₂ Granular Films by Ar+O₂ Reactive Sputtering Using CoPtCrSi Target Peer-reviewed

Shingo Sasaki, Kim Kong Tham, Shintaro Hinata, Shin Saito

Vacuum and Surface Science　61　(7)　469-473　2018/07

DOI： 10.1380/vss.61.469 　
Reduction of intergranular exchange coupling for CoPt-B₂O₃ granular media by employing a RuCoCr-oxide buffer layer with oxide of various melting points Peer-reviewed

Kim Kong Tham, Ryosuke Kushibiki, Tomonari Kamada, Shintaro Hinata, Shin Saito

IEEE Transactions on Magnetics　54　(11)　3201004-1-3201004-4　2018/06

DOI： 10.1109/TMAG.2018.2835559 　
Zero-field electron Larmor precession in NiFe/SiN/GaAs nanohybrid structure at room temperature Peer-reviewed

Kazuhiro Nishibayashi, Tadashi Kawazoe, Shin Saito, Tetsuji Mori, Hiroaki Fukuda

Applied Physics Express　11　(6)　063001-1-063003-4　2018/06/01
Publisher: Japan Society of Applied Physics
DOI： 10.7567/APEX.11.063003 　

ISSN： 1882-0786 1882-0778
Volume Ratio Effect of Dual Oxides With a Different Melting Point on Microstructure of High Ku Co80Pt20 Granular Media Peer-reviewed

Kim Kong Tham, Ryosuke Kushibiki, Tomonari Kamada, Shintaro Hinata, Shin Saito

IEEE Transactions on Magnetics　54　(6)　3200504-1-3200504-4　2018/06/01
Publisher: Institute of Electrical and Electronics Engineers Inc.
DOI： 10.1109/TMAG.2018.2818135 　

ISSN： 0018-9464
Observation of magnetic domain by compact magneto-optical Kerr effect microscope combination uses of probing apparatus

Yusuke Odagiri, Eiji Yanagisawa, Sakae Meguro, Shin Saito

42　(15)　69-70　2018/06
Surface structure of MgO underlayer with Ti diffusion for (002) oriented L 10 FePt-based heat assisted magnetic recording media Peer-reviewed

Sintaro Hinata, Shin Jo, Shin Saito

AIP Advances　8　(5)　056515-1-056515-4　2018/05/01
Publisher: American Institute of Physics Inc.
DOI： 10.1063/1.5007759 　

ISSN： 2158-3226
Reduction of intergranular exchange coupling and grain size for high K u CoPt-based granular media: Metal-oxide buffer layer and multiple oxide boundary materials Peer-reviewed

Kim Kong Tham, Ryosuke Kushibiki, Tomonari Kamada, Shintaro Hinata, Shin Saito

AIP Advances　8　(5)　056510-1-056510-6　2018/05/01
Publisher: American Institute of Physics Inc.
DOI： 10.1063/1.5007776 　

ISSN： 2158-3226
Ru Alloy-Oxide Buffer Layer for Intergranular Exchange Decoupling of CoPt-B2O3 Granular Media Peer-reviewed

Kim Kong Tham, Ryosuke Kushibiki, Tomonari Kamada, Shintaro Hinata, Shin Saito

IEEE Transactions on Magnetics　54　(2)　3200404-1-3200404-4　2018/02/01
Publisher: Institute of Electrical and Electronics Engineers Inc.
DOI： 10.1109/TMAG.2017.2749433 　

ISSN： 0018-9464
Q-band強磁性共鳴を用いたc面配向CoPtCr薄膜の実効ダンピング定数の評価

日向慎太朗, 斉藤伸

電気学会マグネティックス研究会資料　MAG-17-151　63-65　2017/11
Magnetic Properties and Columnar Structure for CoPt Alloy Granular Media With Grain Boundary Oxides of Various Melting Points Peer-reviewed

Ryosuke Kushibiki, Kim Kong Tham, Shintaro Hinata, Shin Saito

IEEE TRANSACTIONS ON MAGNETICS　53　(11)　3200604-1-3200604-4　2017/11

DOI： 10.1109/TMAG.2017.2706959 　

ISSN： 0018-9464

eISSN： 1941-0069
Hexagonal Closed Packed CoPtRu Alloy as a Buffer Layer Material for Promoting Heteroepitaxial Growth for Perpendicular Magnetic Recording Media Peer-reviewed

Shintaro Hinata, Yu Suzuki, Ken Inoue, Shin Saito

IEEE TRANSACTIONS ON MAGNETICS　53　(11)　3200704-1-3200704-4　2017/11

DOI： 10.1109/TMAG.2017.2727523 　

ISSN： 0018-9464

eISSN： 1941-0069
High K-u and small grain size Co80Pt20 granular media with double oxide grain boundary materials consisting of B2O3 Peer-reviewed

Ryosuke Kushibiki, Kim Kong Tham, Shintaro Hinata, Shin Saito

AIP ADVANCES　7　(5)　056512-1-056512-7　2017/05

DOI： 10.1063/1.4977768 　

ISSN： 2158-3226
Variation of effective damping factor for CoPt-based alloy films with various atomic stacking structures Peer-reviewed

Sintaro Hinata, Shin Saito

AIP ADVANCES　7　(5)　056519-1-056519-8　2017/05

DOI： 10.1063/1.4978638 　

ISSN： 2158-3226
Layer stacked Co/Pt films with high perpendicular anisotropy sputter deposited at room temperature Peer-reviewed

N. Honda, S. Hinata, S. Saito

AIP ADVANCES　7　(5)　056518-1-056518-5　2017/05

DOI： 10.1063/1.4978636 　

ISSN： 2158-3226
Morphology and magnetic properties of α”-Fe₁₆N₂ nanoparticles synthesized from iron hydroxide and iron oxides Peer-reviewed

M. Tobise, T. Ogawa, S. Saito

Journal of Magnetics Society of Japan　41　(3)　58-62　2017/05/01
Publisher: The Magnetics Society of Japan
DOI： 10.3379/msjmag.1704R003 　

ISSN： 2432-0250

More details Close

 Metastable α"-Fe₁₆N₂ have attracted much interest as a candidate for rare-earth-free hard magnetic materials. To realize high coercivity, it is necessary to utilize not only the magnetocrystalline anisotropy but also the shape anisotropy of α"-Fe₁₆N₂ nanoparticles assemblies. An increase in magnetostatic couplings and intergranular exchange couplings among particles typically reduces the coercivity. Therefore, it is very important to evaluate the anisotropy and magnetic interactions among α"-Fe₁₆N₂ nanoparticles. We have examined the changes in morphology, structure and magnetic properties through the synthesis of α"-Fe₁₆N₂ nanoparticles from various materials such as α-FeOOH, ɤ-Fe₂O₃, and Fe₃O₄. The magnetic interactions were also estimated based on experimental results obtained by analysis of the rotational hysteresis loss of randomly oriented nanoparticles. H_c and H_k^ptc for the α"-Fe₁₆N₂ nanoparticle assemblies for different starting materials ranged from 2.2 to 1.1 kOe, and from 11 to 12 kOe respectively. Experimental results of the normalized coercive force and normalized switching field suggests that the existence of large magnetic interactions among α"-Fe₁₆N₂ nanoparticles.
Temperature Dependence of Infrared Optical Properties at around Curie Temperature for MnSb Thin Films

Koichi Akahane, Seong-Jae Jeon, Shin Saito

MAG-17-36　(27)　41-43　2017/03
Publisher:
Critical layer thickness for columnar growth nanostructures of CoPt-based alloy-oxide granular media used for perpendicular magnetic recording Peer-reviewed

Shingo Sasaki, Yuzo Sasaki, Shin Saito

Journal of the Vacuum Society of Japan　60　(3)　112-118　2017
Publisher: Vacuum Society of Japan
DOI： 10.3131/jvsj2.60.112 　

ISSN： 1882-2398
Sputter-Deposition of Inclined Anisotropy Film with Co/Pt Atomic Layer Stacking

Naoki HONDA, Shintaro HINATA, Shin SAITO

Technical Report of the Institute of Electronics, Information and Communication Engineers　MR2016-38　(2016-12)　51-56　2016/12
Publisher:
ISSN： 1342-6893
Photographic observation of magnetic domain structure with three-dimensional local magnetization direction Peer-reviewed

Sakae Meguro, Koichi Akahane, Shin Saito

JAPANESE JOURNAL OF APPLIED PHYSICS　55　(7)　07MF04-1-07MF04-5　2016/07

DOI： 10.7567/JJAP.55.07MF04 　

ISSN： 0021-4922

eISSN： 1347-4065
B2O3: Grain boundary material for high-K-u CoPt-oxide granular media with low degree of intergranular exchange coupling Peer-reviewed

Kim Kong Tham, Shintaro Hinata, Ryosuke Kushibiki, Shin Saito

JAPANESE JOURNAL OF APPLIED PHYSICS　55　(7)　07MC06-1-07MC06-5　2016/07

DOI： 10.7567/JJAP.55.07MC06 　

ISSN： 0021-4922

eISSN： 1347-4065
Characterization of CoPt-based granular media with intergranular magnetic interaction by Q-band ferromagnetic resonance

Shintaro HINATA, Daiji HASEGAWA, Shin SAITO

Technical Report of the Institute of Electronics, Information and Communication Engineers　MR2016-1　(2016-06)　1-4　2016/06
Compositional dependence of Cr_100-xTi_x texture-inducing layer underlying (002) textured bcc-Cr alloy seed layer for FePt-C based heat-assisted magnetic recording media

Seong Jae JEON, Shintaro HINATA, Shin SAITO

Technical Report of the Institute of Electronics, Information and Communication Engineers　MR2016-2　(2016-06)　5-9　2016/06
Effect of oxide boundary materials on magnetic properties for CoPt-based granular media

Kim Kong THAM, Ryosuke KUSHIBIKI, Shintaro HINATA, Shin SAITO

Technical Report of the Institute of Electronics, Information and Communication Engineers　MR2016-3　(2016-06)　11-16　2016/06
Publisher:
ISSN： 1342-6893
Effect of additional elements on compositional modulated atomic layered structure of hexagonal Co80Pt20 alloy films with superlattice diffraction Peer-reviewed

Shintaro Hinata, Akira Yamane, Shin Saito

AIP ADVANCES　6　(5)　056504-1-056504-8　2016/05

DOI： 10.1063/1.4944668 　

ISSN： 2158-3226
Centimeter-order view for magnetic domain imaging with local magnetization direction by longitudinal Kerr effect Peer-reviewed

Sakae Meguro, Koichi Akahane, Shin Saito

AIP ADVANCES　6　(5)　056504-1-056504-5　2016/05

DOI： 10.1063/1.4948256 　

ISSN： 2158-3226
Amorphous Cr-Ti texture inducing layer for L1₀ ordered FePt-C granular film on (002) textured bcc-Cr based seed layer Peer-reviewed

Seong-Jae Jeon, Shintaro Hinata, Shin Saito

Journal of Magnetics (Korean Magnetics Society)　21　(1)　35-39　2016/03/14

DOI： 10.4283/JMAG.2016.21.1.035 　
Magnetorefractive effect for Co/Ru multilayer film with antiferro-magnetically interlayer exchange coupling Peer-reviewed

Haruhiko Sato, Shin Saito, Shota Mizuno, Koichi Akahane, Hironaga Uchida

IEEJ Transactions on Fundamentals and Materials　136　(4)　174-179　2016
Publisher: Institute of Electrical Engineers of Japan
DOI： 10.1541/ieejfms.136.174 　

ISSN： 1347-5533 0385-4205
Tetragonally distorted structure and uniaxial magnetic anisotropy of Fe100-xCox/Rh/MgO epitaxial films Peer-reviewed

H. Oomiya, B. Wang, S. Yoshida, T. Kataguchi, K. Takahashi, S. Kanatani, L. Zhang, L. Liu, T. Hasegawa, K. Hayasaka, S. Saito, N. Inami, T. Ueno, K. Ono, S. Ishio

JOURNAL OF PHYSICS D-APPLIED PHYSICS　48　(47)　475003-1-475003-6　2015/12

DOI： 10.1088/0022-3727/48/47/475003 　

ISSN： 0022-3727

eISSN： 1361-6463
Effect of Topological Bumpy Surface Underlayer on Compositionally Modulated Atomic Layer Stacking in High K-u hcp Co80Pt20 Film With (00.2) Crystallographic Texture Orientation Peer-reviewed

Kim Kong Tham, Shintaro Hinata, Shin Saito

IEEE TRANSACTIONS ON MAGNETICS　51　(11)　3202404-1-3202404-4　2015/11

DOI： 10.1109/TMAG.2015.2458016 　

ISSN： 0018-9464

eISSN： 1941-0069
Effective damping factor for CoPtCr-SiO₂ perpendicular magnetic recording medium with pertially switched magnetic domains Peer-reviewed

S. Hinata, S. Saito, M. Takahahi, M. Sahashi

Journal of the Mangetics Society of Japan　39　(5)　177-180　2015/09/29
Publisher: The Magnetics Society of Japan
DOI： 10.3379/msjmag.1508R002 　

ISSN： 1882-2924

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For the microwave assisted magnetic recording media design, effect of magnetization reversal and intergranular exchange coupling on effective damping factor (α_eff) was investigated by Q-band FMR for Co₈₄Pt₁₆Cr₁₀-8mol (SiO₂) granular media. Two kinds of media A and B, wicth have small and large intergranular exchange coupling, were investigated. As a result, it was found that: 1) Magnitude of the normalized intergranular exchange coupling field (H_ex/H_k) was 0.2 and 0.35 for the medium A and B, respectively. 2) For the medium A, α_eff was significantly increased from 0.03 to 0.11 with decreasing normalized magnetization |M|/M_s from 1 to 0.4. At the same time, for the medium B, α_eff was increased from 0.05 to just 0.07. 3) Origin of difference of α_eff increment is considered that difference of distribution and magnitude of the intergranular exchange coupling.
Thermally Assisted Magnetic Recording using Plasmon Antenna with Ultra Short Laser Pulse Peer-reviewed

S. Mano, H. Yoshikawa, H. Hashiba, Y. Ashizawa, A. Tsukamoto, Y. Sasaki, S. Saito, M. Takahashi, S. Ohnuki, K. Nakagawa

Journal of the Mangetics Society of Japan　39　(5)　192-195　2015/09/29
Publisher: The Magnetics Society of Japan
DOI： 10.3379/msjmag.1508R005 　

ISSN： 1882-2924

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As one of the methods for ultra high density recording of hard disk drives, Thermally Assist Magnetic Recording (TAMR) increases memory density and thus attracts attention. The key technology of the TAMR is applying laser light as well as plasmon antenna to generate localized near-field spot. We fabricated plasmon antennas on magnetic film to understand fundamental recording capability by confined near-field stimulated by ultra short laser pulse. Some square plasmon gold antennas were deposited over a magnetic recording film (Co₅₅Pt₃₀Cr₁₅-SiO₂). We successfully confirmed that small magnetic domains of 67 nm × 62 nm were written at the corner of the plasmon antennas by the surface plasmon effect with a femto-second laser pulse.
Effect of magnetization state on effective damping factor of CoPtCr granular media

Shintaro Hinata, Shin Saito

電気学会マグネティックス研究会資料　MAG-15-87　81-85　2015/08
Metal-oxide buffer layer for maintaining topological bumpy surface underlayer of columnar CoPt-SiO2 granular media deposited at high substrate temperature Peer-reviewed

Kim Kong Tham, Shintaro Hinata, Shin Saito, Migaku Takahashi

JOURNAL OF APPLIED PHYSICS　117　(17)　17A923-1-17A923-4　2015/05

DOI： 10.1063/1.4918566 　

ISSN： 0021-8979

eISSN： 1089-7550
Compositional modulated atomic layer stacking and uniaxial magnetocrystalline anisotropy of CoPt alloy sputtered films with close-packed plane orientation Peer-reviewed

Shin Saito, Naoki Nozawa, Shintaro Hinata, Migaku Takahashi, Kazunari Shibuya, Kazuya Hoshino, Satoru Awaya

JOURNAL OF APPLIED PHYSICS　117　(17)　17C753-1-17C753-4　2015/05

DOI： 10.1063/1.4918760 　

ISSN： 0021-8979

eISSN： 1089-7550
Highly (002) textured large grain bcc Cr80Mn20 seed layer on Cr50Ti50 amorphous layer for FePt-C granular film Peer-reviewed

Seong-Jae Jeon, Shintaro Hinata, Shin Saito, Migaku Takahashi

JOURNAL OF APPLIED PHYSICS　117　(17)　17A924-1-17A924-4　2015/05

DOI： 10.1063/1.4919225 　

ISSN： 0021-8979

eISSN： 1089-7550
Magneto-optical imaging by photographic method - Dynamic magnetic domain and magnetic field images in sub-μm to cm field of view - Invited

Sakae Meguro, Shin Saito

日本磁気学会第204回研究会資料　204　9-12　2015
Publisher:
ISSN： 1882-2940
FDTD法による磁気光学プラズモニック構造体の光学応答の検討

大木敬介, 大槻健也, 佐藤丈敏, 佐藤春彦, Fedyanin Andrey, 斉藤伸, 内田裕久, 井上光輝

電気学会マグネティックス研究会資料　MAG-14-191　15-19　2014/12
反強磁性的層間結合多層膜の光学応答に現れるスピン依存散乱の効果

佐藤春彦, 水野翔太, 斉藤伸, 赤羽浩一, 内田裕久

電気学会マグネティックス研究会資料　MAG-14-198　51-55　2014/12
Stacking structure dependence of magnetic properties of Co/Pt layer stacked film sputter deposited at room temperature

Taruho TSUCHIYA, Naoki HONDA, Hironaga Uchida, Shin SAITO, Shintaro HINATA

Technical Report of the Institute of Electronics, Information and Communication Engineers　MR2014-38　(2014-12)　59-64　2014/12
Publisher:
ISSN： 1342-6893
Effective damping factor of CoPt-based granular media during microwave assisted magnetic recording Invited

Shintaro HINATA, Shin SAITO

Technical Report of the Institute of Electronics, Information and Communication Engineers　MR2014-24　(2014-11)　7-11　2014/11
Publisher: The Institute of Electronics, Information and Communication Engineers
ISSN： 0913-5685

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Effect of magnetization reversal and intergranular exchange coupling on effective damping factor (α_<eff>) was investigated by Q-band FMR for Co_<84>Pt_<16>Cr_<10>-8mol (SiO_2) granular media. Intergranular exchange coupling was indirectly changed by surface roughness of Ru underlayer. As a result, it was found that: 1) Magnitude of the normalized intergranular exchange coupling field H_<ex>/H_k was 0.2 and 0.35 for small and large intergranular exchange coupling medium, respectively. 2) For a small intergranular exchange coupling medium, α_<eff> was significantly increased from 0.03 to 0.11 with decreasing normalized magnetization |M|/M_s from 1 to 0.4. At the same time, for large intergranular exchange coupling medium, α_<eff> was increased from 0.05 to just 0.07. 3) Origin of difference of α_<eff> increment is considered that difference of distribution and magnitude of the intergranular exchange coupling.
High K-u and Low Intergranular Exchange Coupling of Postannealed CoPt-WO3 Granular Film Peer-reviewed

Kim Kong Tham, Shintaro Hinata, Shin Saito, Migaku Takahashi

IEEE TRANSACTIONS ON MAGNETICS　50　(11)　3203204-1-3203204-4　2014/11

DOI： 10.1109/TMAG.2014.2321025 　

ISSN： 0018-9464

eISSN： 1941-0069
Microwave-Assisted Magnetization Reversal for Granular Media by a Resonant Cavity Method Peer-reviewed

Shintaro Hinata, Shin Saito, Migaku Takahashi, Masashi Sahashi

IEEE TRANSACTIONS ON MAGNETICS　50　(11)　3102004-1-3102004-4　2014/11

DOI： 10.1109/TMAG.2014.2322450 　

ISSN： 0018-9464

eISSN： 1941-0069
Low-Temperature Deposition of Co/Pt Film with High-Perpendicular Magnetic Anisotropy by Layer Stacking Sputtering Peer-reviewed

Naoki Honda, Taruho Tsuchiya, Shin Saito, Hironaga Uchida, Kiyoshi Yamakawa

IEEE TRANSACTIONS ON MAGNETICS　50　(11)　3203104-1-3203104-4　2014/11

DOI： 10.1109/TMAG.2014.2327240 　

ISSN： 0018-9464

eISSN： 1941-0069
Alloying effect of Cr-based seed layer on control of sheet texture of MgO and thermal conductivity Peer-reviewed

Hidetaka Yakabe, Shintaro Hinata, Shin Saito, Migaku Takahashi

JOURNAL OF APPLIED PHYSICS　115　(17)　17B743-1-17B743-3　2014/05

DOI： 10.1063/1.4868323 　

ISSN： 0021-8979

eISSN： 1089-7550
Successful fabrication of high K-u columnar CoPt-SiO2 granular film sputtered under high substrate temperature Peer-reviewed

Kim Kong Tham, Shintaro Hinata, Shin Saito, Migaku Takahashi

JOURNAL OF APPLIED PHYSICS　115　(17)　17B752-1-17B752-3　2014/05

DOI： 10.1063/1.4869164 　

ISSN： 0021-8979

eISSN： 1089-7550
Evaluation of Atomic Layer Stacking Structure and Curie Temperature of Magnetic Films for Thermally Assisted Recording Media (Invited) Invited Peer-reviewed

Shin Saito, Shintaro Hinata, Migaku Takahashi

IEEE TRANSACTIONS ON MAGNETICS　50　(3)　3201205-1-3201205-5　2014/03

DOI： 10.1109/TMAG.2013.2285286 　

ISSN： 0018-9464

eISSN： 1941-0069
Kerr Microscope: Investigation of the high time and spatial resolution detection of small changes in polarization Invited

Sakae Meguro, Shin Saito, Eiji Yanagisawa, Kouich Akahane, Migaku Takahashi

電気学会マグネティックス研究会資料　MAG-13-124　13-18　2013/12
Co-Pt-Cr-CoSi-CoO Sintered Target for Low Ar-gas-pressure Deposition of CoPtCr-SiO2 Granular Film with Stoichiometric SiO2 Phase Peer-reviewed

Shingo Sasaki, Shin Saito, Migaku Takahashi

IEEE TRANSACTIONS ON MAGNETICS　49　(12)　5603-5609　2013/12

DOI： 10.1109/TMAG.2013.2274050 　

ISSN： 0018-9464

eISSN： 1941-0069
Atomic layer stacking structure and uniaxial magnetocrystalline anisotropy for c-plane oriented Co film sputtered on inclined crystal plane of Ru underlayer Peer-reviewed

Shintaro Hinata, Daiji Hasegawa, Takuya Kimura, Shin Saito, Migaku Takahashi, Masashi Sahashi

Journal of the Mangetics Society of Japan　37　(6)　372-377　2013/11/01
Publisher: The Magnetics Society of Japan
DOI： 10.3379/msjmag.1310R004 　

ISSN： 1882-2924

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Relation among structure of Ru underlayer and atomic layer stacking structure and uniaxial magnetocrystalline anisotropy (K_u) of sputtered Co films was discussed. Small torque with amplitude below theoretical limit |K_u^Cobulk-2π(M_s^Cobulk)²| = 6.8×10⁶ erg/cm³ was obtained for Co film with thickness d_Co ＜ 30 nm deposited on rough Ru underlayer. Structure analysis of the thin Co films with d_Co ＜ 30 nm deposited on rough Ru underlayer demonstrated that: 1) Magnitude of stacking faults were less than 1%, which meant the Co films had almost perfect hcp stacking, 2) Lattice constant c was expanded about 0.6% with retaining lattice constant a, 3) Thin Co films had rough surface which reflected morphology of the Ru underlayer. According to these results, it was thought that initial Co growth reflected vertical stacking of Ru underlayer on inclined crystal plane of the rough Ru underlayer. K_u was derived by correcting torque amplitude with self-demagnetizing energy considering surface morphology of Co film. K_u took maximal value of 5.0×10⁶ erg/cm³ at d_Co = 30 nm, and rapidly decreased with decreasing d_Co. Reduction of K_u in d_Co ＜ 30 nm might be caused by decrement of crystallographic uniaxial anisotropy for Co film due to expansion of the c axis.
Enhancement of Linear and Saturation Components of Longitudinal Kerr Effect for Ferromagnetic/ Noble-Nonmagnetic Metal Films by Surface Plasmon Excitation Peer-reviewed

Shin Saito, Michiaki Suzuki, Guang Xiang Du, Tetsuji Mori, Hiroaki Fukuda, Migaku Takahashi

Journal of the Mangetics Society of Japan　37　(6)　352-357　2013/11/01
Publisher: The Magnetics Society of Japan
DOI： 10.3379/msjmag.1310R003 　

ISSN： 1882-2924

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Enhancement of the longitudinal Kerr effect by excitation of surface plasmon resonance (SPR) in ferromagnetic Co₇₂Fe₈B₂₀/Au stacked films was investigated in a Kretschmann configuration with p-polarized light at 633 nm. We found that (1) it was possible to excite SPR in the bi-layer structure of Co₇₂Fe₈B₂₀/Au with the necessity of the Au layer faced to air. We also found that (2) the dependence of the longitudinal Kerr effect on the incident angle indicated that the saturation component of ellipticity was bell-shaped in the hysteresis loop, while the rotation angle had a dispersed-shaped distribution. In contrast, the rotation angle was bell-shaped for the linear component, while the ellipticity had a dispersed-shaped distribution. Moreover, we discovered that (3) the saturation component of the longitudinal Kerr effect in the Co₇₂Fe₈B₂₀/Au (20 nm) stacked film had a steep maximum as a function of the thickness of the ferromagnetic layer, and that the strongest resonance occurred at a ferromagnetic layer thickness of 8 nm. In addition, we found that (4) the linear component of the longitudinal Kerr effect was caused by the Faraday effect of the prism and glass substrate, which was extremely enhanced by SPR.
The effect of shape anisotropy on the spectroscopic characterization of the magneto-optical activity of nanostructures Peer-reviewed

G. X. Du, S. Saito, M. Takahashi

JOURNAL OF APPLIED PHYSICS　113　(21)　213104-1-213104-5　2013/06

DOI： 10.1063/1.4808449 　

ISSN： 0021-8979
Efficient Approach to Measure Crystallization Temperature in Amorphous Thin Film by Infrared Reflectivity Peer-reviewed

Wenxiu Wang, Shin Saito, Hidetaka Yakabe, Migaku Takahashi

JOURNAL OF MAGNETICS　18　(2)　86-89　2013/06

DOI： 10.4283/JMAG.2013.18.2.086 　

ISSN： 1226-1750
Large uniaxial magnetocrystalline anisotropy for Co50Pt 50 disordered alloy films with hexagonal-close-packed stacking structure by substituting Pt with Rh Peer-reviewed

Naoki Nozawa, Shin Saito, Shintaro Hinata, Migaku Takahashi

Journal of Physics D: Applied Physics　46　(17)　172001-1-172001-5　2013/05/01

DOI： 10.1088/0022-3727/46/17/172001 　

ISSN： 0022-3727 1361-6463
Effect of residual strain in Fe-based amorphous alloys on field induced magnetic anisotropy and domain structure Peer-reviewed

Daichi Azuma, Ryusuke Hasegawa, Shin Saito, Migaku Takahashi

JOURNAL OF APPLIED PHYSICS　113　(17)　17A339-1-17A339-3　2013/05

DOI： 10.1063/1.4799969 　

ISSN： 0021-8979

eISSN： 1089-7550
Thermally Assisted Magnetic Recording Applying Optical Near Field with Ultra Short-Time Heating Peer-reviewed

K. Nakagawa, A. Tajiri, K. Tamura, S. Toriumi, Y. Ashizawa, A. Tsukamoto, A. Itoh, Y. Sasaki, S. Saito, M. Takahashi, S. Ohnuki

Journal of the Mangetics Society of Japan　37　(3-2)　119-122　2013/05/01

DOI： 10.3379/msjmag.1302R016 　
Atomic layer stacking structure and negative uniaxial magnetocrystalline anisotropy for Co_100-xIr_x sputtered films Peer-reviewed

N. Nozawa, S. Saito, T. Kimura, K. Shibuya, K. Hoshino, S. Hinata, M. Takahashi

Journal of the Mangetics Society of Japan　37　(3-2)　183-189　2013/05/01

DOI： 10.3379/msjmag.1305R005 　
Giant negative uniaxial magnetocrystalline anisotropy of Co 80Ir20 sputtered films with perfect hexagonal-close-packed and composition-modulated atomic layer stacking Peer-reviewed

Naoki Nozawa, Shin Saito, Takuya Kimura, Kazunari Shibuya, Kazuya Hoshino, Shintaro Hinata, Migaku Takahashi

Applied Physics Letters　102　(1)　012407-1-012407-4　2013/01/07

DOI： 10.1063/1.4773998 　

ISSN： 0003-6951
Effect of Co replacement with Fe on uniaxial magnetocrystalline anisotropy in disordered hcp CoPtRh alloy films Peer-reviewed

Naoki Nozawa, Shin Saito, Shintaro Hinata, Migaku Takahashi

IEEE Transactions on Magnetics　49　(7)　3596-3599　2013

DOI： 10.1109/TMAG.2013.2246833 　

ISSN： 0018-9464
Reduction of the intergranular exchange coupling in granular type perpendicular magnetic recording media -inserting a thin layer deposited under high ar gas pressure into the initial growth region of recording layer- Peer-reviewed

Shingo Sasaki, Shin Saito, Migaku Takahashi

Journal of the Vacuum Society of Japan　56　(9)　377-381　2013

DOI： 10.3131/jvsj2.56.377 　

ISSN： 1882-2398 1882-4749
Spectroscopic detection of magneto-optical hysteresis in a single magnetic field sweep by faraday cell modulation Peer-reviewed

Shin Saito, Tatsuaki Sasaki, Sakae Meguro, Guang-Xiang Du, Migaku Takahashi

IEEE Transactions on Magnetics　49　(7)　3537-3540　2013

DOI： 10.1109/TMAG.2013.2243714 　

ISSN： 0018-9464
Intergranular Exchange Coupling Field Under Multidomain State for Stacked Perpendicular Recording Media Evaluated by Ferromagnetic Resonance Peer-reviewed

Shintaro Hinata, Shin Saito, Migaku Takahashi

IEEE TRANSACTIONS ON MAGNETICS　48　(11)　3177-3180　2012/11

DOI： 10.1109/TMAG.2012.2203114 　

ISSN： 0018-9464
Effect of inhomogeneous microstructure of granular layer on inter granular/inter layer exchange coupling in stacked perpendicular recording media Peer-reviewed

Kim Kong Tham, Shin Saito, Daiji Hasegawa, Norikazu Itagaki, Shintaro Hinata, Shinichi Ishibashi, Migaku Takahashi

JOURNAL OF APPLIED PHYSICS　112　(9)　093917-1-093917-8　2012/11

DOI： 10.1063/1.4764312 　

ISSN： 0021-8979
Perfect Hcp Atomic-layer Stacking for Sputtered Co Film with c-plane Sheet Texture by Substrate Heating Sputtering

Naoki NOZAWA, Shin SAITO, Shintaro HINATA, Migaku TAKAHASHI

Technical Report of the Institute of Electronics, Information and Communication Engineers　MR2012-16　(2012-7)　41-46　2012/07
Publisher: The Institute of Electronics, Information and Communication Engineers
ISSN： 0913-5685

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Effects of substrate heating of Co sputtered film with c-plane sheet texture on atomic-layer stacking were investigated and correlation between the atomic-layer stacking and uniaxial magnetocrystalline anisotropy constant (K_u) were analyzed. Through the quantitative evaluation of degree of stacking faults using laboratory-scale in-plane XRD, it was found that; (1) c-plane-oriented pseudo-hep structure with around 10 % fcc stacking (P_<fcc>) as stacking faults was formed in Co films sputtered at room temperature (R.T.). By sputtering with 400℃ substrate heating, nearly complete hep structure with less than 0.1 % fcc stacking was successfully made. (2) The value of saturation magnetization (M_s) was constant and the same as the value of hcp Co bulk with increasing substrate temperature (T_), while the value of K_u changed drastically against T_ and took the maximum value of 6.1 × 10^6 erg/cm^3. (3) In the analysis of perpendicular magnetic torque with twofold and fourfold components, K_<u2> contributes dominantly to K_u (= K_<u1> + K_<u2>) at P_<fcc> = 7 - 10 %. Moreover, K_<u1> and K_<u2> has the same contribution to K_u at P_<fcc> = 2.5 % and K_<u1> contributes to K_u more than K_<u2> at P_<fcc> = 0 %. (4) Therefore, it was revealed that substrate heating was effective method to eliminate stacking faults in oplane-oriented Co magnetic grains, which accordingly enhances the uniaxial magnetocrystalline anisotropy energy of Co sputtered film to the same value of hep Co bulk (K_u = 5.97 × 10^6 erg/cm^3).
Characterization of Co-based Granular Perpendicular Media Using Ferromagnetic Resonance Invited

Shintaro HINATA, Shin SAITO, Daiji HASEGAWA, Migaku TAKAHASHI

Technical Report of the Institute of Electronics, Information and Communication Engineers　MR2012-16　(2012-7)　47-52　2012/07
Publisher:
ISSN： 1342-6893
Ferromagnetic resonance analysis of internal effective field of classified grains by switching field for granular perpendicular recording media Peer-reviewed

Shintaro Hinata, Shin Saito, Migaku Takahashi

JOURNAL OF APPLIED PHYSICS　111　(7)　07B722-1-07B722-3　2012/04

DOI： 10.1063/1.3679466 　

ISSN： 0021-8979

eISSN： 1089-7550
Domain structure and magnetization loss in a toroidal core based on an Fe-based amorphous alloy Peer-reviewed

Daichi Azuma, Ryusuke Hasegawa, Shin Saito, Migaku Takahashi

Journal of Applied Physics　110　(7)　07A302-1-07A302-3　2012/02/07

DOI： 10.1063/1.3670065 　
Test Method for Thermally Assisted Magnetic Recording Applying Surface Plasmon Antennas Stacked on Magnetic Layer Peer-reviewed

Katsuji Nakagawa, Yuji Osa, Atsumu Tajiri, Yoshito Ashizawa, Shinichiro Ohnuki, Yuzo Sasaki, Shin Saito, Migaku Takahashi, Akiyoshi Ito

Journal of the Mangetics Society of Japan　36　(1-2)　58-62　2012/02
Publisher: The Magnetics Society of Japan
DOI： 10.3379/msjmag.1110M001 　

ISSN： 1882-2924

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We propose a new test method for surface plasmon antennas applied to thermally assisted magnetic recording. Plasmon antennas were directly fabricated on a CoPtCr granular recording medium to maintain a distance between the antennas and the film. This method also makes it possible to prevent the antennas or media from becoming degraded. A silicon nitride dielectric layer was placed between the antennas and the magnetic layer to maintain a precise distance. We chose a thickness of 3 nm for the dielectric layer. Four hundred triangular Au antennas were formed on the medium with an E-beam lithographic technique. The written magnetic domains below the surface of the plasmon antennas were observed by magnetic force microscopy. Therefore, we were able to test the thermal effect of the plasmon antennas by directly placing them on the magnetic film.
Effective Switching Field Distribution Evaluation Using Saturation Field in Minor Loop Peer-reviewed

Shintaro Hinata, Shin Saito, Norikazu Itagaki, Migaku Takahashi

IEEE Transactions on Magnetics　48　(3)　1248-1251　2012

DOI： 10.1109/TMAG.2011.2157330 　

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オリジナルは、IEEE Transactions on Magnetics, 47, No. 10, 3951-3954 (2011)。編集ミスのため、再印刷した。
Fast magneto-optical spectrometry by spectrometer Peer-reviewed

G. X. Du, S. Saito, M. Takahashi

REVIEW OF SCIENTIFIC INSTRUMENTS　83　(1)　013103-1-013103-5　2012/01

DOI： 10.1063/1.3673638 　

ISSN： 0034-6748
磁気光学効果による2次元ナノ構造を有する貴金属のプラズモンモードの研究

杜関祥, 斉藤伸, 高橋研

電気学会マグネティックス研究会資料　MAG-11-111　101-104　2011/11
Tailoring the Faraday effect by birefringence of two dimensional plasmonic nanorod array Peer-reviewed

G. X. Du, S. Saito, M. Takahashi

APPLIED PHYSICS LETTERS　99　(19)　191107-1-191107-3　2011/11

DOI： 10.1063/1.3660318 　

ISSN： 0003-6951
Effect of Using Oblique-Incidence Deposited Ru Interlayers Deposited by Evaporation and Sputtering on Recording Characteristics of Perpendicular Media Peer-reviewed

Shin Saito, Ken Inoue, Migaku Takahashi

IEEE TRANSACTIONS ON MAGNETICS　47　(10)　3955-3958　2011/10

DOI： 10.1109/TMAG.2011.2157329 　

ISSN： 0018-9464
Magnetic Field Effect on the Localized Plasmon Resonance in Patterned Noble Metal Nanostructures Peer-reviewed

Guan-Xiang Du, Shin Saito, Migaku Takahashi

IEEE TRANSACTIONS ON MAGNETICS　47　(10)　3167-3169　2011/10

DOI： 10.1109/TMAG.2011.2157479 　

ISSN： 0018-9464
Evaluation of inter-granular coupling in stacked perpendicular recording media Peer-reviewed

K. K. Tham, D. Hasegawa, N. Itagaki, S. Hinata, S. Ishibashi, S. Saito, M. Takahashi

Physics Procedia　16　(1)　42-47　2011/09/14

DOI： 10.1016/j.phpro.2011.06.105 　
Reduction of Ru Interlayer Thickness for Granular Type Perpendicular Recording Media by Oblique-Incidence Sputtering Peer-reviewed

K. Inoue, S. Saito, M. Takahashi

Journal of the Mangetics Society of Japan　35　(4)　349-355　2011/07
Publisher: The Magnetics Society of Japan
DOI： 10.3379/msjmag.1106R004 　

ISSN： 1882-2924

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We carried out oblique-incidence sputtering and analyzed in detail the growth mechanism necessary to achieve both good magnetic isolation and a reduction of the Ru interlayer thickness. The results revealed that : (1) Ru grains in the obliquely sputtered Ru thin film possessed a c -plane sheet texture due to epitaxial growth on seed layer grains, and deep gaps were observed at the grain boundaries ; (2) evaluation of the magnetic properties of the magnetic layer deposited on obliquely and conventionally sputtered Ru films suggests that magnetic isolation was enhanced by oblique-incidence sputtering ; (3) an obliquely sputtered pseudo-hcp PdW, CoCr interlayer also enhanced the magnetic isolation of the subsequent magnetic layer ; (4) following the initial growth of a continuous Ru film 1 nm thick, the grains grew, whereas by the conventional method this initial continuous Ru film grew to a thickness of 8nm, showing clear suppression of the continuous Ru layer by oblique-incidence sputtering, and (5) the media using an obliquely sputtered Ru interlayer showed V_act/V_grain = 1.9 with a top layer thickness of 8 nm ; thus, it was possible to reduce the Ru interlayer thickness by suppressing the constitution of the bottom layer.
Oblique-incidence sputtering of Ru intermediate layer for decoupling of intergranular exchange in perpendicular recording media Peer-reviewed

Shin Saito, Ken Inoue, Migaku Takahashi

JOURNAL OF APPLIED PHYSICS　109　(7)　07B753-1-07B753-3　2011/04

DOI： 10.1063/1.3562262 　

ISSN： 0021-8979
Q-band ferromagnetic resonance for CoPt-based stacked perpendicular recording media with interlayer exchange coupling Peer-reviewed

Shintaro Hinata, Shin Saito, Daiji Hasegawa, Migaku Takahashi

JOURNAL OF APPLIED PHYSICS　109　(8)　083935-1-083935-5　2011/04

DOI： 10.1063/1.3569843 　

ISSN： 0021-8979
Nanoscale physical microstructure and micromagnetic behaviour of CoIr film with negative anisotropy Peer-reviewed

D-T Ngo, A. Hashimoto, S. McVitie, S. Saito, J. N. Chapman, M. Takahashi

JOURNAL OF PHYSICS D-APPLIED PHYSICS　44　(9)　095001-1-095001-9　2011/03

DOI： 10.1088/0022-3727/44/9/095001 　

ISSN： 0022-3727

eISSN： 1361-6463
Evaluation of interlayer ferromagnetic coupling for stacked media by adding reference layer Peer-reviewed

K. K. Tham, S. Saito, D. Hasegawa, N. Itagaki, S. Hinata, M. Takahashi

2ND INTERNATIONAL SYMPOSIUM ON ADVANCED MAGNETIC MATERIALS AND APPLICATIONS (ISAMMA 2010)　266　(1)　012063-1-012063-5　2011

DOI： 10.1088/1742-6596/266/1/012063 　

ISSN： 1742-6588
Effect of Rh spacer on Synthetic-Antiferromagnetic Coupling in FeCoB/Rh/FeCoB Films Peer-reviewed

W. X. Xia, K. Inoue, S. Saito, M. Takahashi

2ND INTERNATIONAL SYMPOSIUM ON ADVANCED MAGNETIC MATERIALS AND APPLICATIONS (ISAMMA 2010)　266　(1)　012064-1-012064-5　2011

DOI： 10.1088/1742-6596/266/1/012064 　

ISSN： 1742-6588
Effect of Ar-gas-pressure on oxygen content of Co-Si-O granular film sputter-deposited by using sintered targets Peer-reviewed

S. Sasaki, S. Saito, M. Takahashi

2ND INTERNATIONAL SYMPOSIUM ON ADVANCED MAGNETIC MATERIALS AND APPLICATIONS (ISAMMA 2010)　266　(1)　012062-1-012062-5　2011

DOI： 10.1088/1742-6596/266/1/012062 　

ISSN： 1742-6588
Magnetic Isolation for Hf-capped CoPtCr-SiO2 Perpendicular Media by Postannealing Peer-reviewed

S. Hinata, S. Saito, M. Takahashi

2ND INTERNATIONAL SYMPOSIUM ON ADVANCED MAGNETIC MATERIALS AND APPLICATIONS (ISAMMA 2010)　266　(1)　012057-1-012057-5　2011

DOI： 10.1088/1742-6596/266/1/012057 　

ISSN： 1742-6588
Shape-enhanced magneto-optical activity: Degree of freedom for active plasmonics Peer-reviewed

G. X. Du, T. Mori, S. Saito, M. Takahashi

PHYSICAL REVIEW B　82　(16)　161403(R)-1-161403(R)-4　2010/10

DOI： 10.1103/PhysRevB.82.161403 　

ISSN： 1098-0121
Low-Gas-Pressure Deposition of Co-SiO₂ Granular Films by Reactive Sputtering Using CoSi Alloy Target Peer-reviewed

S. Sasaki, S. Saito, M. Takahashi

Journal of the Mangetics Society of Japan　34　(5)　563-567　2010/09
Publisher: The Magnetics Society of Japan
DOI： 10.3379/msjmag.1008R003 　

ISSN： 1882-2924

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We propose a technique for low-gas-pressure (0.6 Pa) deposition of a granular film consisting of Co-based metallic grains and stoichiometric SiO₂ grain boundaries by using reactive sputtering. As a typical example, we experimented in forming Co-SiO₂ granular films by using dc magnetron sputtering with Ar+O₂ mixed gas with a Co_92.3Si_7.7 (at%) alloy target. Detailed analyses of the composition, microstructure, and magnetic properties of the granular films revealed that: (1) a high deposition rate of 3.4 nm/s was realized under a Si-selective oxidization condition of the surface of the CoSi alloy target. (2) The granular film with an O/Si composition ratio of 2 was successfully achieved under the selective oxidization conditions. (3) c-plane-oriented Co grains with SiO₂ grain boundaries were formed on a Ru underlayer. (4) The low-gas-pressure process made it possible to enhance the columnar grown of Co grains without tapering off. These results suggest that the low-gas-pressure process will be effective in improving corrosion and impact resistance even for the current mass-produced perpendicular magnetic recording media with CoPtCr (-SiO₂, -TiO₂) granular materials.
Probing of Faraday Effect with Micron Spot Laser Light for Nano-dots Patterned Array Peer-reviewed

T. Mori, G. X. Du, M. Suzuki, S. Saito, H. Fukuda, M. Takahashi

Journal of the Mangetics Society of Japan　34　(4)　493-498　2010/07
Publisher: The Magnetics Society of Japan
DOI： 10.3379/msjmag.1007R002 　

ISSN： 1882-2924

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A Faraday-effect system to measure small patterned areas with about a 6-μm sized laser spot was constructed. We found that highly accurate Faraday measurements were possible for a patterned array of nanodots and also obtained the dependence of the Faraday effect on the angle of the sample. Two lasers with wavelengths of 633 nm and 690 nm were close to the local surface plasmon resonance (LSPR) wavelengths of the noble material of Au. A nanodot array, consisting of magnetic materials made up of a Co/Pt multilayer, sandwiched by Au, that was not more than 100 nm in diameter, was fabricated, and the optical and magneto-optical properties were investigated.
Development of Longitudinal Kerr Imaging System for mm-Order Vector Domain Observation

Sakae Meguro, Shin Saito, Kouichi Akahane, Migaku Takahashi

Technical Report of the Institute of Electronics, Information and Communication Engineers　MR2010-16　(2010-07)　25-28　2010/07
Publisher: The Institute of Image Information and Television Engineers
DOI： 10.11485/itetr.34.26.0_25 　

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Recently, the development of the energy efficient equipment is driven by environmental problems and the energy resource depletion problem. The energy loss associated with the motors and the transformers is a huge amount, and it is necessary to execute the efficiency improvement on these devices in order to decrease the global environment stress. For these devices, an analysis means for which the magnetic process by the domain observation is very useful in an amorphous strips and the flat rolled magnetic steel sheets. However, there was a problem that the size of the device was large and the evaluation over a large area was necessary. We have developed the Kerr effect microscope that can promptly evaluate the magnetic district structure of micron order. This time, we applied the basic technology established in the Kerr microscope optical system to the focused optical system. As a result, we developed the wide viewing domain imaging device witch can observe the magnetic domain of the mm order, and can detect the direction of the magnetization.
Development for Pseudo-hcp Thin Films for Perpendicular Recording Media Invited

Shin Saito, Migaku Takahashi

Technical Report of the Institute of Electronics, Information and Communication Engineers　MR2010-15　(2010-07)　17-24　2010/07
Magneto-optical effects in nanosandwich array with plasmonic structure of Au/[Co/Pt](n)/Au Peer-reviewed

Guan Xiang Du, Tetsuji Mori, Michiaki Suzuki, Shin Saito, Hiroaki Fukuda, Migaku Takahashi

JOURNAL OF APPLIED PHYSICS　107　(9)　09A928-1-09A928-3　2010/05

DOI： 10.1063/1.3368110 　

ISSN： 0021-8979
Evaluation of Anisotropy Field and g-factor of c-plane Oriented CoPtCr Alloy Film Using Q-band Ferromagnetic Resonance Peer-reviewed

S. Hinata, S. Saito, M. Takahashi

Journal of the Mangetics Society of Japan　34　(3)　214-219　2010/05

DOI： 10.3379/msjmag.1003R048 　
Characterization of MgZnO films grown by plasma enhanced metal-organic chemical vapor deposition Peer-reviewed

Hirokazu Asahara, Daiju Takamizu, Atsutoshi Inokuchi, Masaki Hirayama, Akinobu Teramoto, Shin Saito, Migaku Takahashi, Tadahiro Ohmi

THIN SOLID FILMS　518　(11)　2953-2956　2010/03

DOI： 10.1016/j.tsf.2009.09.195 　

ISSN： 0040-6090
Evidence of localized surface plasmon enhanced magneto-optical effect in nanodisk array Peer-reviewed

Guan Xiang Du, Tetsuji Mori, Michiaki Suzuki, Shin Saito, Hiroaki Fukuda, Migaku Takahashi

APPLIED PHYSICS LETTERS　96　(8)　081915-1-081915-3　2010/02

DOI： 10.1063/1.3334726 　

ISSN： 0003-6951
Low-Gas-Pressure Sputtering of CoPtCr-SiO2 Granular Films Made by a Sintered Target Without SiO2 Powder Peer-reviewed

Shingo Sasaki, Shin Saito, Migaku Takahashi

IEEE MAGNETICS LETTERS　1　4500104-1-4500104-4　2010

DOI： 10.1109/LMAG.2010.2054830 　

ISSN： 1949-307X
Microstructure and magnetic properties of Co-SiO₂ granular film deposited by sintered targets with Co, Si and Co-oxide compounds Peer-reviewed

S. Sasaki, S. Saito, M. Takahashi

Journal of the Mangetics Society of Japan　33　(4)　362-368　2009/08
Publisher: The Magnetics Society of Japan
DOI： 10.3379/msjmag.0905RD0003 　

ISSN： 1882-2924

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The relationship among the sputtering conditions, composition, microstructure, and magnetic properties of Co-Si-O granular film deposited using various metal-oxide composite targets was investigated. The raw materials of the sintered targets were (a) (Co)-(SiO₂), (b) (Co)-(Si)-(Co₃O₄), and (c) (Co)-(Si)-(CoO) retaining the same nominal composition of (Co)-7.7mol%(SiO₂), Co_79.9Si_6.7O_13.4 (at%). It was found that; (1) in the case of Ar gas pressure (P_Ar) of 0.6-4.0 Pa, the discharge voltage with targets (b) and (c) was lower than that with target (a), (2) the oxygen content of the film became larger with increasing P_Ar from 0.6-8.0 Pa, (3) each granular film deposited by using the three targets with the same sputtering conditions showed nearly the same film composition, phase, microstructure and magnetic properties. This indicates that it is possible to control oxygen content and O/Si ratio in the granular film at the same time by increasing the amount of raw material of oxide in the composite target. Moreover, it is indispensable for formation of SiO₂ phase in the films to choose at least two kinds of raw materials including Si or O.
Uniaxial magnetocrystalline anisotropy for c-plane oriented Co_100-xGe_x film with pseudo-hcp structure

Shintaro HINATA, Ryuichi YANAGISAWA, Shin SAITO, Migaku TAKAHASHI

Technical Report of the Institute of Electronics, Information and Communication Engineers　MR2009-2　(2009-06)　5-8　2009/06
Uniaxial magnetocrystalline anisotropy for c-plane oriented Co100-xMx (M: Cr, Mo, W) film with stacking faults Peer-reviewed

Shintaro Hinata, Ryuichi Yanagisawa, Shin Saito, Migaku Takahashi

JOURNAL OF APPLIED PHYSICS　105　(7)　07B718-1-07B718-3　2009/04

DOI： 10.1063/1.3079768 　

ISSN： 0021-8979
Small, highly oriented Ru grains in intermediate layer realized through suppressing relaxation of low-angle grain boundaries for perpendicular recording media Peer-reviewed

Norikazu Itagaki, Shin Saito, Migaku Takahashi

JOURNAL OF APPLIED PHYSICS　105　(7)　07B734-1-07B734-3　2009/04

DOI： 10.1063/1.3073947 　

ISSN： 0021-8979
Tailor-made nano-structured materials for perpendicular recording media and head-precise control of direct/indirect exchange coupling Invited Peer-reviewed

Migaku Takahashi, Masakiyo Tsunoda, Shin Saito

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS　321　(6)　539-544　2009/03

DOI： 10.1016/j.jmmm.2008.05.008 　

ISSN： 0304-8853

eISSN： 1873-4766
Extreme nano-structure control by sputtering for the high density perpendicular recording media and head Invited

Migaku Takahashi, Masakiyo Tsunoda, Shin Saito

ECS Transactions　16　(45)　19-35　2009

DOI： 10.1149/1.3140007 　

ISSN： 1938-5862 1938-6737
Semi-quantitative evaluation of stacking faults in pseudo-hcp thin films by laboratory-scale in-plane x-ray diffraction Peer-reviewed

Shin Saito, Atsushi Hashimoto, Daiji Hasegawa, Migaku Takahashi

Journal of Physics D: Applied Physics　42　(14)　145007-1-145007-7　2009

DOI： 10.1088/0022-3727/42/14/145007 　

ISSN： 0022-3727 1361-6463
Degree of chemical reaction of carbon and oxygen to ferromagnetic grains for Co-based alloy-oxide granular structure Peer-reviewed

Shingo Sasaki, Shin Saito, Migaku Takahashi

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS　320　(22)　3023-3026　2008/11

DOI： 10.1016/j.jmmm.2008.08.013 　

ISSN： 0304-8853
Angular-dependent remanent magnetization curve for perpendicular magnetic recording media determined by precise polar-Kerr detection system Invited Peer-reviewed

D. Hasegawa, S. Saito, N. Itagaki, S. Meguro, Y. Konishi, E. Yanagisawa, K. Akahane, M. Takahashi

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS　320　(22)　3027-3031　2008/11

DOI： 10.1016/j.jmmm.2008.08.058 　

ISSN： 0304-8853
Topological bumped surface induced by the lattice extension of the RuCr intermediate layer for granular-type perpendicular recording media Peer-reviewed

Shinji Yonemura, Shin Saito, Atsushi Hashimoto, Migaku Takahashi

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS　320　(22)　3053-3056　2008/11

DOI： 10.1016/j.jmmm.2008.08.098 　

ISSN： 0304-8853
Advanced granular-type perpendicular recording media Invited Peer-reviewed

Migaku Takahashi, Shin Saito

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS　320　(22)　2868-2873　2008/11

DOI： 10.1016/j.jmmm.2008.07.039 　

ISSN： 0304-8853
AlN: A Hexagonal-Nitride Seed Layer Underneath Ru for Granular-Type Perpendicular Magnetic Recording Media Peer-reviewed

Shinichi Ishibashi, Shin Saito, Atsushi Hashimoto, Migaku Takahashi

IEEE TRANSACTIONS ON MAGNETICS　44　(11)　3511-3514　2008/11

DOI： 10.1109/TMAG.2008.2002617 　

ISSN： 0018-9464
Crystal Structure as an Origin of High-Anisotropy Field of FeCoB Films With Ru Underlayer Peer-reviewed

A. Hashimoto, K. Hirata, T. Matsuu, S. Saito, S. Nakagawa

IEEE TRANSACTIONS ON MAGNETICS　44　(11)　3899-3901　2008/11

DOI： 10.1109/TMAG.2008.2002252 　

ISSN： 0018-9464
4.8 nm diameter Ru grains grown on a large-grain seed layer for perpendicular magnetic recording media Peer-reviewed

Norikazu Itagaki, Shin Saito, Migaku Takahashi

JOURNAL OF PHYSICS D-APPLIED PHYSICS　41　(15)　152006-1-152006-4　2008/08

DOI： 10.1088/0022-3727/41/15/152006 　

ISSN： 0022-3727
Pseudo-hcp nonmagnetic intermediate layer for granular media with high perpendicular magnetic anisotropy Peer-reviewed

Atsushi Hashimoto, Shin Saito, Norikazu Itagaki, Migaku Takahashi

JOURNAL OF PHYSICS D-APPLIED PHYSICS　41　(1)　012002-1-012002-4　2008/01

DOI： 10.1088/0022-3727/41/1/012002 　

ISSN： 0022-3727
Top-pinned soft magnetic underlayer with nano- or oriented-crystalline structure fabricated by electroless plating Peer-reviewed

Atsushi Hashimoto, Shin Saito, Migaku Takahashi, Nobuaki Mukai

JOURNAL OF APPLIED PHYSICS　102　(3)　033906-1-033906-4　2007/08

DOI： 10.1063/1.2764205 　

ISSN： 0021-8979
Kerr Microscope in conventional Labo-scale: Domain structure observation in μm scale and determination of the local magnetization direction within one single domain Invited

Shin Saito, Sakae Meguro, Koichi Akahane, Migaku Takahashi

日本応用磁気学会第155回研究会資料　1-5　2007/07
Improvement of magnetic properties of granular perpendicular recording media by using a fcc nonmagnetic intermediate layer with stacking faults Peer-reviewed

Atsushi Hashimoto, Shin Saito, Norikazu Itagaki, Migaku Takahashi

APPLIED PHYSICS LETTERS　89　(26)　262508-1-262508-3　2006/12

DOI： 10.1063/1.2424280 　

ISSN： 0003-6951
Fe content dependence of synthetic-antiferromagnetic coupling in subnano-crystalline FeCoB/Ru/FeCoB films Peer-reviewed

Atsushi Hashimoto, Shin Saito, Dong Young Kim, Hiroshi Takashima, Tomonori Ueno, Migaku Takahashi

IEEE TRANSACTIONS ON MAGNETICS　42　(10)　2342-2344　2006/10

DOI： 10.1109/TMAG.2006.879432 　

ISSN： 0018-9464
Magnetization switching of NiFeSiB free layers for magnetic tunnel junctions Peer-reviewed

B. S. Chun, S. P. Ko, B. S. Oh, J. Y. Hwang, J. R. Rhee, T. W. Kim, S. Saito, S. Yoshimura, M. Tsunoda, M. Takahashi, Y. K. Kim

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS　304　(1)　E258-E260　2006/09

DOI： 10.1016/j.jmmm.2006.02.052 　

ISSN： 0304-8853
Role of bottom layer of double recording layer structure for antiferromagnetically coupled longitudinal media Peer-reviewed

T. Q. Li, D. Hasegawa, S. Saito, H. Ohyama, M. Imakawa, M. Takahashi

IEEE TRANSACTIONS ON MAGNETICS　42　(9)　2215-2217　2006/09

DOI： 10.1109/TMAG.2006.878244 　

ISSN： 0018-9464
Magnetization switching of CoFeSiB free-layered magnetic tunnel junctions Peer-reviewed

Byong Sun Chun, Jae Youn Hwang, Jang Roh Rhee, Taewan Kim, Shin Saito, Satoru Yoshimura, Masakiyo Tsunoda, Migaku Takahashi, Young Keun Kim

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS　303　(2)　E223-E225　2006/08

DOI： 10.1016/j.jmmm.2006.01.041 　

ISSN： 0304-8853
Development of Template Intermediate Layer with Physically/Chemically Separated Structure for Perpendicular Magnetic Recording Media

Shin SAITO, Tomoyuki SHIMA, Norikazu ITAGAKI, Migaku TAKAHASHI

Technical Report of the Institute of Electronics, Information and Communication Engineers　MR2006-11　(2006-07)　7-11　2006/07
Publisher:
ISSN： 1342-6893
Marked enhancement of synthetic-antiferromagnetic coupling in subnanocrystalline FeCoB/Ru/FeCoB sputtered films Peer-reviewed

Atsushi Hashimoto, Shin Saito, Kazumi Omori, Hiroshi Takashima, Tomonori Ueno, Migaku Takahashi

APPLIED PHYSICS LETTERS　89　(3)　032511-1-032511-3　2006/07

DOI： 10.1063/1.2234294 　

ISSN： 0003-6951
A soft magnetic underlayer with negative uniaxial magnetocrystalline anisotropy for suppression of spike noise and wide adjacent track erasure in perpendicular recording media Peer-reviewed

A Hashimoto, S Saito, M Takahashi

JOURNAL OF APPLIED PHYSICS　99　(8)　08Q907-1-08Q907-3　2006/04

DOI： 10.1063/1.2177126 　

ISSN： 0021-8979
Proposal for Use of Soft Magnetic Material with Negative Uniaxial Magnetocrystalline Anisotropy as an SUL to Suppress both WATE and Spike Noise Peer-reviewed

A. Hashimoto, S. Saito, M. Takahashi

Journal of the Mangetics Society of Japan　30　(2)　135-140　2006/03
Publisher: The Magnetics Society of Japan
DOI： 10.3379/jmsjmag.30.135 　

ISSN： 0285-0192

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Suppression of spike noise and wide adjacent track erasure (WATE) are important technical issues for perpendicular recording media (PRM) with a soft magnetic underlayer (SUL). To solve these problems simultaneously, we propose in this paper a new type of SUL with negative uniaxial perpendicular magnetic anisotropy (Ku_⊥) induced by material with negative uniaxial magnetocrystalline anisotropy (K_u^grain). For the proposed SUL, it can be expected that (1) WATE will be suppressed due to a wide distribution of magnetic flux under the return yoke, and that (2) spike noise will be eliminated due to the formation of a Neel wall instead of a Bloch wall. We selected hcp-CoIr as a negative k_u^grain material and fabricated c-plane-oriented CoIr film by sputtering. K_u^grain of c-plane-oriented CoIr film had a minimum value of -6 × 10⁶ erg/cm³ (saturation magnetization, M_s = 920 emu/cm³ ) at an Ir content of 22 at.%. In PRM using c-plane-oriented CoIr films as SULs, WATE could be suppressed compared with the PRM using amorphous CoZrNb as SUL. And from evaluation of envelopes for PRM using c-plane-oriented CoIr films as SULs, it was found that spike noise could not be clearly observed with a CoIr thickness below the calculated critical thickness of Neel wall formation.
Diffusion analyses of non-ferromagnetic element in the cap-layer of post-annealed CoCrPt perpendicular media Peer-reviewed

N Itagaki, S Saito, M Takahashi

IEEE TRANSACTIONS ON MAGNETICS　41　(10)　3187-3189　2005/10

DOI： 10.1109/TMAG.2005.855286 　

ISSN： 0018-9464
Magnetization reversal mechanism of soft magnetic underlayer pinned by antiferromagnetic layer Peer-reviewed

A Hashimoto, S Saito, M Takahashi

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS　287　287-291　2005/02

DOI： 10.1016/j.jmmm.2004.10.047 　

ISSN： 0304-8853
Direct Synthesis of fct-FePt Nano Particles and Monolayer Stabilization on Rigid Substrate

M. Takahashi, S. Saito, B. Jeyadevan, M. Inoue

Proceedings of International Symposium on Ultra-High Density Spinic Storage Systems　(PS-15)　137-140　2004/12
Improvement of perpendicular magnetic properties by postannealing for M '-CoCrPt-M stacked media (M, M ' = Ti, Ta, Ru, Pt, CrMn, MnSi) Peer-reviewed

S Saito, N Itagaki, M Takahashi

IEEE TRANSACTIONS ON MAGNETICS　40　(4)　2467-2469　2004/07

DOI： 10.1109/tmag.2004.830160 　

ISSN： 0018-9464
Isolation of Magnetic Grains for CoCr-Based Perpendicular Media with Ti Cap- and Under-layers through Application of Post-annealing Peer-reviewed

S. Saito, N. Itagaki, M. Takahashi

Journal of the Mangetics Society of Japan　28　(3)　295-300　2004/03
Publisher: The Magnetics Society of Japan
DOI： 10.3379/jmsjmag.28.295 　

ISSN： 0285-0192

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To combine “maintenance of thermal stability” and “magnetic isolation among magnetic grains” for CoCr-based perpendicular media, we focus attention on the post-annealing process. Significant improvement of the magnetic properties is confirmed for the post-annealed media utilizing titanium as both cap- and under-layers. In consequence it was found that a remarkable large coercivity of 9.1 kOe and squareness of 1 are realized for Ti/Co₆₈Cr₁₆Pt₁₆/Ti post-annealed media; a non-ferromagnetic TiCoPt layer with B2 type structure is formed between the Ti and CoCrPt layers by post-annealing; and a remarkable improvement of the magnetic properties is caused by both magnetic isolation among magnetic grains and elimination of the nanocrystalline initial layer, which behaves like a soft magnetic layer.
Single-Domain and Magnetic Properties of a Soft Magnetic Underlayer Plated on an Al/NiP Disk Peer-reviewed

S. Saito, A. Hashimoto, M. Takahashi, N. Mukai

Journal of the Mangetics Society of Japan　28　(3)　289-294　2004/03
Publisher: The Magnetics Society of Japan
DOI： 10.3379/jmsjmag.28.289 　

ISSN： 0285-0192

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We propose a noble stacked soft magnetic underlayer (SUL) with the so-called top-type pinning structure, which consists of a soft magnetic layer (SM layer) fabricated by plating and an antiferromagnetic layer (AFM layer) deposited by sputtering, on an Al/NiP disk. Through investigation of the structure and magnetic properties of this stacked SUL, we clarified the following points: (1) the thermal stability of NiFeP plated on an Al/NiP disk is 280°C, which is the crystallization temperature of the amorphous NiP layer; (2) to induce large unidirectial magnetic anisotropy in the SUL, it is necessary to introduce a soft magnetic buffer layer and apply dry etching to the NiFeP surface; (3) a unidirectional magnetic anisotropy field can be induced in an SM layer fabricated by plating as well as in one fabricated by sputtering, which results in the whole disk having a single-domain structure.
Enhancement of Interlayer Exchange Coupling in Stacked Soft-Magnetic Layers with RKKY Interaction for Perpendicular Recording Media

Shin SAITO, Atsushi HASHIMOTO, Migaku TAKAHASHI

Technical Report of the Institute of Electronics, Information and Communication Engineers　MR2003-27　(2003-11)　1-6　2003/11
Study of Nanocrystalline Soft Magnetic Material of an Fe-Si-Al-N Film with High Saturation Magnetization and Low SUL Noise

Shin SAITO, Atsushi HASHIMOTO, Kenichi HIRAI, Migaku TAKAHASHI

Technical Report of the Institute of Electronics, Information and Communication Engineers　MR2003-2　(2003-06)　7-12　2003/06
Publisher: The Institute of Electronics, Information and Communication Engineers
ISSN： 0913-5685

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To develop nanocrystalline soft magnetic underlayer (SUL) material with high saturation magnetization and low SUL noise, we studied the properties of an Fe-Si-Al-N film. To obtain SUL with high stray-field stability, the Fe-Si-Al-N film is applied to antiferro/ferromagnetic (AFM/FM) multilayer films. As the results, the following points are clarified: 1) As the composition of FeSiAlN film, with increasing nitrogen flow ratio, Fe is replace with N on constant Al + Si concentration line. 2) With increasing nitrogen content, soft magnetic properties of FeSiAlN film are increased due to nanocrystalline effect. 3) As the grain size of FeSiAlN film is decreased, the SUL noise of FeSiAlN film is reduced. Since subsequent high temperature annealing process is not necessary, this process is promising to be applied for moderate temperature process. 4) In the AFM/FM stacked SUL film, the unidirectionOal exchange energy J_k is decreased with the total magnetization of the film.
Characterization to realize CoCr-based perpendicular magnetic recording media with high squareness and normalized coercivity Peer-reviewed

S Saito, F Hoshi, N Itagaki, M Takahashi

JOURNAL OF APPLIED PHYSICS　93　(10)　6775-6777　2003/05

DOI： 10.1063/1.1557818 　

ISSN： 0021-8979
Improvement of magnetocrystalline anisotropy of columnar structure for epitaxially grown CoCr-based perpendicular media Peer-reviewed

S Saito, N Itagaki, F Hoshi, M Takahashi

JOURNAL OF APPLIED PHYSICS　93　(10)　8182-8184　2003/05

DOI： 10.1063/1.1558093 　

ISSN： 0021-8979
Guideline for Selecting Materials to be used in CoCr-Based Perpendicular Media with High Squareness and Normalized Coercivity Peer-reviewed

S. Saito, F. Hoshi, N. Itagaki, M. Takahashi

Journal of the Mangetics Society of Japan　27　(4)　204-209　2003/04
Publisher: The Magnetics Society of Japan
DOI： 10.3379/jmsjmag.27.204 　

ISSN： 0285-0192

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A guideline for selecting materials to be used in CoCr-based perpendicular media with high squareness and normalized coercivity was investigated by taking the effects of thermal agitation and intergranular exchange coupling into consideration. The main results are as follows: (1) The current media have a low maximum value of H_c/H_k^grainof 0.35, which is considered to be due to the effects of thermal agitation for K_u^grain V_act/kT <150, and intergranular exchange coupling for K_u^grain V_act/kT > 200. (2) Media with low 4πM_s/H_k^grain and large α tend to show a low positive H_n/H_k^grain. (3) Media with large 4πM_s/H_k^grain and large α tend to show a low effective nucleation field H_n^eff. On the other hand, some media that have low α, with a value of about 1, show positive H_n^eff. The behavior of H_n^eff is considered to be caused by thermal agitation. (4) To realize a medium with S = 1 and α as low as possible, the selection of a material with 4πM_s/H_k^grain = 0.2-0.3 (for α = 1.6) is promising. This medium is expected to show values of K_u^grain V_act/kT of 150-200, and of H_c/H_k^grain of 0.22-0.28. To realize a medium with high H_c/H_k^grain, 4πM_s/H_k^grain = 0.6-0.7 (for α = 1.3) is promising. This medium is expected to show values of K_u^grain V_act/kT of 150, and of H_c/H_k^grain of 0.35.
Material Problems in Soft-Magnetic Underlayers with High Stray-Field Stability Using Interlayer Magnetic Coupling Peer-reviewed

S. Saito, K. Hirai, A. Hashimoto, M. Tsunoda, M. Takahashi

Journal of the Mangetics Society of Japan　27　(4)　224-229　2003/04
Publisher: The Magnetics Society of Japan
DOI： 10.3379/jmsjmag.27.224 　

ISSN： 0285-0192

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To reduce the spike noise caused by stray magnetic fields, we investigated layered stacking soft-magnetic underlayers (SULs) with interlayer magnetic coupling. To reduce SUL noise as well, nanocrystalline or amorphous materials are used in the large part of the soft-magnetic layer. Through investigation of material problems in ferromagnetic (FM)/nonmagnetic (NM) stacked SULs and antiferromagnetic (AFM)/ferromagnetic (FM) stacked SULs, the following points were clarified: (1) In the case of FM/NM stacked layers using Ru as the NM layer and CoZrNb as the FM layer, when the layer structure of CoZrNb (150 nm)/Ru (0.6 nm)/CoZrNb (150 nm) was adopted, the M-H loop was shifted due to RKKY interlayer exchange coupling. The value of the interlayer exchange coupling constant J was derived at a small value of 0.015 erg/cm². (2) In the above layer structure, by sputtering the Ru layer under At + O₂ atmosphere, or by introducing a Co₇₀Fe₃₀ layer which has high saturation magnetization M_s, between the Ru layer and CoZrNb layer, the value of H_ex and J were enhanced. The J value shows prospects of enhancement over one digit if appropriate materials and process are introduced. (3) In AFM/FM stacked SULs, the unidirectional anisotropy constant J_k between the AFM and FM layers was reduced by increasing the thickness of the FM layer. The principal problem is how to suppress the reduction of J_k by controlling the soft magnetic properties of the FM layer.
Effects of very thin carbon seedlayer on formation of hcp phase for CoCrPtB/Co60Cr40 perpendicular magnetic recording media Peer-reviewed

S Saito, F Hoshi, M Takahashi

IEEE TRANSACTIONS ON MAGNETICS　38　(5)　1985-1987　2002/09

DOI： 10.1109/TMAG.2002.801795 　

ISSN： 0018-9464
Thin Film Growth and Evaluation Method for Conventional Co-Cr Based Perpendicular Magnetic Recording Media: Problems and New Solutions

Shin Saito, Fumikazu Hoshi, Daiji Hasegawa, Migaku Takahashi

Journal of Magnetics (Korean Magnetics Society)　7　(3)　115-125　2002/09

DOI： 10.4283/JMAG.2002.7.3.115 　
Microstructural Analysis for CoCrPtB/Co₆₀Cr₄₀ Perpendicular Magnetic Recording Media with Very Thin C Seedlayer

Shin SAITO, Fumikazu HOSHI, Migaku TAKAHASHI

Technical Report of the Institute of Electronics, Information and Communication Engineers　MR2002-14　(2002-07)　1-6　2002/07
Evaluation of thickness of initial growth layer in CoCr-based perpendicular media by perpendicular torquemetry Peer-reviewed

S Saito, F Hoshi, M Takahashi

JOURNAL OF APPLIED PHYSICS　91　(10)　8028-8030　2002/05

DOI： 10.1063/1.1452270 　

ISSN： 0021-8979
Study of magnetic field determined from vanishing rotational hysteresis loss in CoCrPtB perpendicular thin film media Peer-reviewed

S Saito, Y Sato, F Hoshi, DD Djayaprawira, M Takahashi

JOURNAL OF APPLIED PHYSICS　91　(10)　8351-8353　2002/05

DOI： 10.1063/1.1452278 　

ISSN： 0021-8979
Analysis of growing mechanism for MnSb epitaxial films fabricated on a Si substrate by dc sputtering Peer-reviewed

Y Ashizawa, S Saitan, M Takahashi

JOURNAL OF APPLIED PHYSICS　91　(10)　8096-8098　2002/05

DOI： 10.1063/1.1452236 　

ISSN： 0021-8979
Temperature dependence of perpendicular magnetic anisotropy for c-plane-oriented MnSb sputtered films Peer-reviewed

Y Ashizawa, S Saito, M Takahashi

JOURNAL OF APPLIED PHYSICS　91　(10)　8240-8242　2002/05

DOI： 10.1063/1.1452223 　

ISSN： 0021-8979
Thickness Dependence of the Magnetic Field Determined from the Vanishing Rotational Hysteresis Loss for CoCr-Based Perpendicular Thin-Film Media Peer-reviewed

S. Saito, Y. Sato, F. Hoshi, M. Takahashi

Journal of the Mangetics Society of Japan　26　(4)　215-218　2002/04
Publisher: The Magnetics Society of Japan
DOI： 10.3379/jmsjmag.26.215 　

ISSN： 0285-0192

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The thickenss dependence of a magnetic field from which the rotational hysteresis loss has vanished was experimentally investigated for Co-CrPtB perpendicular recording media. It was clarified that (1) in Co₇₂Cr₁₆Pt₈B₄ media with film thickenss d_mag. under 200 nm and Co₆₄Cr₂₄Pt₈B₄ media with d_mag. under 100nm, a homogeneous structure was realized, except for the existence of an initial growth region with a thickness of about 2 nm; (2) for both media, the perpendicular rotational hysteresis loss W_r, the maximum field of W_r, H_p, and the field where W_r=0, H_Wr=0, increase with increasing d_mag.; (3) for both media,H_Wr=0 increase with increasing d_mag. and saturates at a field of about magnetic anisotropy H_k^gain; and (4) for a medium with a thim magnetic film, at an applied field H_Wr=0 < H < H_k^gain in a direction parallel to the film plane, a multi-domain state is realized, even though no hysteresis loss has been observed in torque measurement at this field. The last of these findings is considered to be due to the existence of thermal agitation between the multi-domains.
Magnetic Properties and Microstructure of CoCrPtB Perpendicular Thin-Film Media with a Co₆₀Cr₄₀ Layer and a Very Thin C Layer Peer-reviewed

S. Saito, F. Hoshi, M. Takahashi

Journal of the Mangetics Society of Japan　26　(4)　210-214　2002/04
Publisher: The Magnetics Society of Japan
DOI： 10.3379/jmsjmag.26.210 　

ISSN： 0285-0192

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The perpendicular magnetic properties and structures of CoCrPtB/Ti, CoCrPtB/Co₆₀Cr₄₀/Ti, and CoCrPtB/Co₆₀Cr₄₀/C/Ti perpendicular media were investigated. By examining the growth forms of a Co₆₀Cr₄₀ intermediate layer and a magnetic layer, as well as the effects of inserting a very thin C layer, the following points were clarified: (1) in the case of a Co₆₀Cr₄₀ intermediate layer fabricated without a C layer, hcp phase with a high concentration of Cr is formed at T_sub.≤ 250°C, and both σ phase and hcp phase with low Cr concentrations are formed at T_sub.≥ 300°C; (2) in the case of a Co₆₀Cr₄₀ intermediate layer fabricated on a very thin C layer, hcp phase with high concentration of Cr is formed only at T_sub.≤ 150°C. At T_sub.≥ 200°C, only the initial nucleation growth of hcp phase with low Cr concentration is formed, which inhibits the formation of σ phase; (3) in the case of a CoCrPtB/Co₆₀Cr₄₀/C/Ti medium, nanocrystalline grains are formed in the initial growth region. In the upper region, c-plane-oriented grains of hcp phase with Cr segregated structure grow in a columnar shape. As a result, the grains of the magnetic layer grow epitaxially on the intermediate layer and the perpendicular magnetic properties are improved remarkably.
Induced Magnetic Anisotropy and Noise Property for the Soft Underlayer of an FeTaN Thin film Controlled by an In-line Process Peer-reviewed

S. Saito, K. Hirai, M. Takahashi

Journal of the Mangetics Society of Japan　26　(4)　248-252　2002/04
Publisher: The Magnetics Society of Japan
DOI： 10.3379/jmsjmag.26.248 　

ISSN： 0285-0192

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To find a soft underlayer with low noise characteristics for double-layer perpendicular media, we investigated the establishment of methods to control the soft-magnetic properties of FeTaN thin film fabricated by an in-line process, and studied the correlation between the soft-magnetic and noise characteristics of FeTaN thin films. As a result, it was clarified that (1) a uniaxial amisotropy field as high as 7.9 Oe with the easy axis in the radial direction of the disk can be induced by maintaining the nitrogen gas flow ratio (F_N2/F_total) between 10% and 30%, while keeping the saturation magnetization as high as 1.4 T to 1.6 T and the film roughness R_a as low as 0.3 nm; (2) in FeTaN thin film fabricated with F_N2/F_total larger than 15%, it is possible to control the easy axis of the induced uniaxial anisotropy in the radial or circumferential direction, by the combining magnetic field application with annealing and cooling processes; (3) it is important to control the stripe domain structure in order to reduce UL noise, even in FeTaN thin film; (4) in FeTaN thin films that have no stripe domain structure, as the coercivity in the easy direction decreases, the media noise tends to decrease a little; (5) FeTaN is a material that shows very low UL noise in comparison with other soft-magnetic materials such as FeBN, FeSiAl, and NiFeMo.
Quantitative evaluation of magnetocrystalline anisotropy of columnar grains and thickness of initial layer in CoCr-based perpendicular media Peer-reviewed

S Saito, D Hasegawa, F Hoshi, DD Djayaprawira, M Takahashi

APPLIED PHYSICS LETTERS　80　(5)　811-813　2002/02

DOI： 10.1063/1.1445467 　

ISSN： 0003-6951
Variation of magnetic properties along the film thickness in perpendicular thin film media investigated by optical method Peer-reviewed

S Saito, Y Hatta, M Takahashi

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS　235　(1-3)　120-125　2001/10

DOI： 10.1016/S0304-8853(01)00370-5 　

ISSN： 0304-8853
Optical Analysis of Magnetization Process Dependence on Film Depth for Perpendicular Thin-Film Media Peer-reviewed

S. Saito, Y. Hatta, M. Takahashi

Journal of the Mangetics Society of Japan　25　(4-2)　587-590　2001/04
Publisher: The Magnetics Society of Japan
DOI： 10.3379/jmsjmag.25.587 　

ISSN： 0285-0192

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Heterogeneity of the perpendicular magnetization process dependence on film depth for CoNiCrTa and CoCrTaPt perpendicular thin-film media is discussed based on a magneto-optical analysis. Results show that: (1) by means of longitudinal Kerr equipment, evaluation for separating longitudinal magnetization of a columnar structure and initial layer is possible; (2) in a perpendicular magnetization process, the top of the medium has high coercive force and high squareness compared with the bottom of the medium; and (3) the top of the medium has homogeneous magnetization thicker than 25 nm, and the bottom has a thickness of about 10 nm. The top and bottom of the medium are considered to be a columnar structure and initial layer, respectively.
Evaluation for Separating Magnetic Properties of Columnar Structure and Initial Layer in CoCr-based Perpendicular Thin-Film Media Peer-reviewed

S. Saito, D. Hasegawa, D. D. Djayaprawira, M. Takahashi

Journal of the Mangetics Society of Japan　25　(4-2)　583-586　2001/04
Publisher: The Magnetics Society of Japan
DOI： 10.3379/jmsjmag.25.583 　

ISSN： 0285-0192

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We proposed a new analysis using perpendicular torquemetry to evaluate the thickness of the initial growth layer, and to define the intrinsic magnetocrystalline anisotropy of columnar structure. In CoNiCrTa media, the initial growth layer consists of nano-crystalline grains whose c-axes are randomly oriented in three dimensions, and the columnar structure consists of grains with the c-plane parallel to the film plane. The plotted product of perpendicular anisotropy to magnetic film thickness versus magnetic film thickness (K_u^⊥ × d_mag. vs d_mag.) for these media reveals that magnetic grains in the columnar structure have a constant uniaxial magnetocrystalline anisotropy of the order of 10⁶ erg/cm³, independent of the magnetic film thickness. By taking account of magneto-optical analysis, we can derive the magnetization process of the initial layer, which is mutually coupled with the neighboring columnar structure, due to its soft magnetic property.
Decrease in Surface Roughness of c-Plane-oriented MnSb Films Prepared by Sputtering Peer-reviewed

S. Saito, Y. Ashizawa, H. Shoji, M. Takahashi

Journal of the Mangetics Society of Japan　25　(4-2)　855-858　2001/04
Publisher: The Magnetics Society of Japan
DOI： 10.3379/jmsjmag.25.855 　

ISSN： 0285-0192

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To decrease surface roughness of c-plane-oriented epitaxial MnSb films fabricated on Si (111) single crystal substrates, reduction of the optimum substrate temperature for formation of c-plane-oriented MnSb films was explored based on the results obtained from precise analyses of initial film growth of c-plane-oriented MnSb films. The main results are as follows: (1) during MnSb film deposition on the Si (111) substrate at T_sub. = 250°C, (a) with an initial layer of MnSb film less than 70 nm thick, Mn reacted with Si, resulting in formation of MnSi, and Sb re-evaporated; (b) with this film region thicker than 70 nm, MnSb was formed on MnSi; (2) the MnSi (111) epitaxial buffer layer played an important role in achieving c-plane-oriented MnSb grains on the Si (111) substrate; (3) by using two-step sputtering, which is a method for fabricating MnSb films on the MnSi layer after changing substrate temperature, (a) we reduced the substrate temperature for preparing the c-plane-oriented MnSb film from 250°C to 200°C, and (b) expanded the temperature range where c-plane-oriented MnSb grains were created, from 150°C to 230°C; and (4) the use of two-step sputtering at T_sub. = 150°C decreased the surface roughness of the film to R_a= 3.6 nm.
Epitaxial Growth of MnSb Films Fabricated by Planar Sputtering: Effect of Substrate Temperature and Bias on Epitaxial Growth Peer-reviewed

S. Saito, Y. Ashizawa, H. Shoji, M. Takahashi, T. Miyazaki

Journal of the Mangetics Society of Japan　24　(4-2)　547-550　2000/04
Publisher: The Magnetics Society of Japan
DOI： 10.3379/jmsjmag.24.547 　

ISSN： 0285-0192

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Ferromagnetic MnSb films were fabricated on Si(100) and (111) single crystal substrates by dc planar sputtering. The effects of the substrate temperature and bias on the epitaxial growth are discussed. The main findings are as follows: (a) MnSb grains grown at T_sub. < 170°C were (110) oriented irrespective of the crystal planes of the Si substrates; (b) MnSb grains with (101), (102), and (001) orientations existed in films prepared at T_sub. > 170°C on Si(100) substrate; (c) MnSb grains epitaxially grown on Si(111) substrate were (101)-oriented at T_sub. = 200°C and (001)-oriented at T_sub. = 250°C; (d) in the sputtering method used, the substrate voltage changed from 0 to - 200 V, corresponding to a change in the ion assist energy from 0 to 40 eV/atom; and (e) the use of an ion assist of 15 eV/atom to Si(111) substrate decreased the epitaxial growth temperature of MnSb(001)-oriented grains from 250°C to 200°C.
Epitaxial Growth of MnSb Sputtered Films: Influence of Charged Particles of Epitaxial Growth Peer-reviewed

H. Oguma, H. Kudo, S. Saito, H. Shoji, M. Takahashi

Journal of the Mangetics Society of Japan　23　(4-2)　1225-1228　1999/04
Publisher: The Magnetics Society of Japan
DOI： 10.3379/jmsjmag.23.1225 　

ISSN： 0285-0192

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Ferromagnetic MnSb films were fabricated on Si (001), (110), and (111) single-crystal substrates by facing-target sputtering and conventional planar sputtering. As a result, epitaxial growth of MnSb was realized by facing-target sputtering. However, it was not realized by planar sputtering. According to the plasma diagnosis, this difference in epitaxial growth was caused either (1) by the damage of Si substrate and MnSb film by the bombardment of high energy electron and/or negative ion or (2) due to the lack of energy supply to MnSb clusters on substrate by the incidence of the positive ions so that MnSb clusters were restricted thus lattice matching to the Si single-crystal substrate. From these results, control of the energy and density of the charged particles was found to be very important for realizing epitaxial growth of MnSb sputtered films.
A Study of Dispersed-precipitates Microstructure and Giant Magneto-optical Properties for MnSbPt Films Peer-reviewed

SAITO Shin

Department of Engineering, Graduate School of Engineering, Tohoku University　1-228　1999/03

DOI： 10.11501/3150057 　

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The mechanism of the enhancement of the MO Kerr rotation in the shortwavelength region for Mn50Sb44Pt6 films was investigated from the viewpoints of the dispersed-precipitates microstructure and of their components of the dielectric tensor. As results, it was found that (1) the PtMnSb phase with fcc structure coherently precipitated at grain boundaries of the host solid solution of the hex. MnSb(Pt) phase at the annealing temperatures less than 300°C, (2) the PtMnSb phase recrystallized to be the size of about 1000 Å, with changing the crystal orientation from (110) to a high atomic density plane of (111) at the annealing temperatures more than 300°C, (3) the PtSb2 phases nucleated and grew to be dendrite as a result of the diffusion of Pt atoms from the PtMnSb phase after annealing over 400°C, (4) for the Mn50Sb44Pt6 film, the maximum of K, where xx' was relatively small, was originated from xy', (5) the appearance and the shift of the K maximum were caused by the xy' maximum, and (6) in the sharing layers between the MnSb phase and the PtMnSb phase under the coherent precipitation process, only the magneto-optical transition (xy' maximum) of the MnSb phase at 2.50 eV was observed.
Influence of Microstructure on Magneto-Optical Kerr Effect for MnSbPt Films: Effect of Precipitated and Recrystallized PtMnSb Phase Peer-reviewed

S. Saito, M. Watanabe, H. Shoji, M. Takahashi

Journal of the Mangetics Society of Japan　23　(1-2)　373-375　1999/01
Publisher: The Magnetics Society of Japan
DOI： 10.3379/jmsjmag.23.373 　

ISSN： 0285-0192

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The relationship between the maximum of a magneto- optical Kerr rotation, θ_K, in the region of 500∼550 nm (2.48∼2.25 eV) and the formation process of the PtMnSb phase for the Mn₅₀Sb₄₄Pt₆ films was discussed. As results, it was found; (1) The PtMnSb phase coherently precipitated at grain boundaries of the host solid solution of the hex. MnSb(Pt) phase at the annealing temperature less than 300°C. (2) The PtMnSb phase recrystallized to be the size of about 1000Å, with changing the crystal orientation into a high atomic density plane of (111) at the annealing temperature more than 300°C. (3) The appearance and the shift of the θ_K maximum were caused by the ε_xy' maximum. (4) The ε_xy'maximum of the PtMnSb phase at 2.00 eV was inactive in the coherent precipitation process, but active in the recrystallization process.
Dielectric Tensor and Magneto-Optical KerrDielectric Tensor and Magneto-Optical Kerr Effect for Mn-Sb-M (M=Au, Pd) Films Consisting of MnSb and MMnSb Phases Peer-reviewed

W. B. Shu, S. Saito, D. Hasegawa, H. Shoji, M. Takahashi

Journal of the Mangetics Society of Japan　23　(1-2)　370-372　1999/01
Publisher: The Magnetics Society of Japan
DOI： 10.3379/jmsjmag.23.370 　

ISSN： 0285-0192

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The contribution of the unique magneto-optical structure with the MnSb and MMnSb (M=Au, Pd) phases to the magneto-optical spectra of the composites films with various MnSb-MMnSb volume fraction was discussed in connection with the dielectric tensor analysis. As results, it was found; (1) The Mn-Sb-M (M=Au, Pd) films after annealing at 300°C consisted of MnSb with the hexagonal phase and MMnSb with the f. c. c. phase. (2) For the Mn-Sb-Au films, the magneto-optical Kerr effect was originated from the off-diagonal part of dielectric tensor, ε_xy', of the hex. MnSb phase. (3) For the Mn-Sb-M (M=Pd, Pt) films, the ε_xy' maxima of ferromagnetic MMnSb (M=Pd, Pt) phases did not change monotonously against volume fraction of MnSb-MMnSb phases.
Influence of Microstructures on Magneto-Optical Kerr Effect for MnSbPt Films (Effect of Precipitation and Recrystallization of PtMnSb Phase)

S. Saito, M. Watanabe, H. Shoji, M. Takahashi

電気学会マグネティックス研究会資料　MAG-98-223　(216)　37-42　1998/12
Microstructure and Magneto-Optical Effect for MnSbPt Films Peer-reviewed

H. Shoji, M. Watanabe, S. Saito, M. Takahashi

Journal of the Magnetics Society of Japan　22　(4-2)　309-312　1998/04
Publisher: The Magnetics Society of Japan
DOI： 10.3379/jmsjmag.22.309 　

ISSN： 0285-0192

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The magneto-optical (MO) Kerr effect for MnSbPt films with a giant magnetic Kerr rotation was investigated in connection with the microstructure. The results revealed that (1) the PtMnSb phase with fcc structure coherently precipitated at the grain-boundary of the matrix MnSb phase with hcp structure after annealing in the range from 200°C to 300°C, (2) both the MnSb phase and the PtMnSb phase were recrystallized after annealing in the range from 300°C to 400°C, (3) the PtSb₂ phases nucleated and grew to be dendrite as a result of the diffusion of Pt atoms from the PtMnSb phase after annealing at over 400°C, and (4) the change in the MO Kerr effect for MnSbPt films annealed at over 300°C corresponded to the decrease in the volume-ratio of the PtMnSb phase to the MnSb phase, owing to the formation and growth of the PtSb₂ phase.
Dielectric Tensor and Magneto-Optical Effect for MnSbPt Films Peer-reviewed

S. Saito, M. Watanabe, H. Shoji, M. Takahashi

Journal of the Magnetics Society of Japan　22　(4-2)　313-316　1998/04
Publisher: The Magnetics Society of Japan
DOI： 10.3379/jmsjmag.22.313 　

ISSN： 0285-0192

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The mechanism of the enhancement of the MO Kerr rotation for Mn₅₀Sb₄₄Pt₆ film was investigated from the view-points of the phases and their components of the dielectric tensor. As a result, it was found that after annealing at 300°C, (1) for (MnSb)_50-0.5xPt_x (x < 14 at%) films, the PtMnSb phase made a larger contribution to the ε'_xx spectrum than would be expected from the Pt concentration, (2) concerning the ε'_xy at 2.3 eV and 4.7 eV, where the PtMnSb phase showed ε'_xy structure, with increasing Pt concentration x along the line of (MnSb)_50-0.5xPt_x, the value of ε'_xy at 4.7 eV decreased monotonously, but the value of ε'_xy at 2.3 eV was maximum at x=17at%, and (3) for the Mn₅₀Sb₄₄Pt₆ film, the maximum of θ_K, where ε'_xx was relatively small, was originated from ε'_xy.
Epitaxial Growth of MnSb Sputtered Films on Si Substrates: Control of Grain Orientation in MnSb Films Peer-reviewed

H. Oguma, S. Saito, H. Shoji, M. Takahashi

Journal of the Magnetics Society of Japan　22　(4-2)　461-464　1998/04
Publisher: The Magnetics Society of Japan
DOI： 10.3379/jmsjmag.22.461 　

ISSN： 0285-0192

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Ferromagnetic MnSb films were fabricated on Si (001), (110), and (111) single-crystal substrates by facing-targets sputtering at various substrate temperatures T_s (R.T. to 400°C). As a result, epitaxial growth of MnSb was realized at a relatively low substrate temperature of T_s=200°C. The crystal orientation between the MnSb and the Si substrate was found to be as follows: (a) MnSb (001)//Si (111). MnSb[210]//Si[112], (b) MnSb (100)//Si (110), MnSb [001]//Si[001], and (c) MnSb (101)//Si (001), MnSb[010]//Si <110>. The value of the surface roughness R_a for an MnSb epitaxial film (3000Å, T_s=200°C) is about 80Å. According to the torque measurement, the easy axis and hard axis of magnetization for MnSb are [010] and [001], respectively. The value of the uniaxial magnetocrystalline anisotropy K_u is −4 × 10⁶ erg/cm³. The easy axis and hard axis of magnetization in the (001) plane of MnSb were found to be [210] and [100], respectively. The value of K'₃ is about 10³ erg/cm³.
Structure and MO Kerr effect for MnSbM(M=Pt, Au, Pd) films Peer-reviewed

WB Shu, S Saito, H Shoji, M Takahashi

IEEE TRANSACTIONS ON MAGNETICS　34　(2)　447-449　1998/03

DOI： 10.1109/20.667788 　

ISSN： 0018-9464
Structure and optical properties of MnSbPt films with giant magnetic Kerr rotation Peer-reviewed

S Saito, M Watanabe, H Shoji, M Takahashi

IEEE TRANSACTIONS ON MAGNETICS　33　(5)　3253-3255　1997/09

DOI： 10.1109/20.617908 　

ISSN： 0018-9464
Structure and Giant Magneto-Optical Effect of MnSbPt Films Peer-reviewed

Shin Saito, Makoto Watanabe, Hiroki Shoji, Migaku Takahashi

Journal of the Magnetics Society of Japan　21　(4-2)　345-348　1997/04
Publisher: The Magnetics Society of Japan
DOI： 10.3379/jmsjmag.21.345 　

ISSN： 0285-0192

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MnSbPt films containing 50 at%Mn, 44 at%Sb, and 6 at% Pt were prepared by RF sputtering. XRD, TEM, and NMR studies revealed that in the as-deposited state, MnSbPt films had a disordered hexagonal structure, and that after annealing at 300°C NiAs-type structure and an fee-type structure were formed, promoting phase separation in MnSbPt films with a giant magneto-optical Kerr rotation. The assumption of a two-phase mixture of NiAs and fee structures is difficult to explain the giant magneto-optical effect in the short wevelength region (∼500 nm) for MnSbPt films. The giant magneto-optical effect is thought to be associated with the microstructure due to the phase separation process.
GIANT MAGNETO-OPTICAL TRANSITION FOR Pt SUBSTITUTED MnSb FILMS WITH NiAs STRUCTURE Invited Peer-reviewed

M. TAKAHASHI, H. SHOJI, M. TSUNODA, S. SAITO, T. WAKIYAMA, Y. TAKEDA, Y. ITAKURA

Journal of the Magnetics Society of Japan　19　(No. S1)　23-28　1995/12
Publisher: The Magnetics Society of Japan
DOI： 10.3379/jmsjmag.19.S1_23 　

ISSN： 0285-0192

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MnSbPt films (thickness of 1000Å) with the concentration of 50at%Mn. 44at%Sb and 6at%Pt annealed 300°C showed giant Kerr rotation angle of about 0.9° at short wavelength of λ=500nm. The results of structural analysis with X-ray and NMR revealed that the giant Kerr rotation angle observed in present films is closely related to the MnSb compound including Pt atom in NiAs structure. The experiments using powder alignment samples prepared under external magnetic field showed that the direction of the easy axis of magnetization of present MnSbPt with NiAs structure was found to change from c-plane to c-axis with increasing Pt concentration.

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Misc. 10

Development of Kerr effect microscope with detection of local magnetization direction and its application to spatial magnetic field detection Invited Peer-reviewed

Sakae Meguro, Shin Saito

KENBIKYOU　52　(3)　119-123　2017/12
Publisher: 日本顕微鏡学会
Nanostructure Control for Thin Film Magnetic Recording Media Invited Peer-reviewed

Shin Saito, Satoru Yoshimura

Magnetics Japan　12　(4)　169-176　2017/08
Publisher: Magnetic Society of Japan
ISSN： 1880-7208
Development of Magnetic Domain Observation System Using Magneto-optical Effect, and its Application to Stress Analysis Invited Peer-reviewed

Sakae Meguro, Shin Saito

Journal of Japanese Society for Non-Destructive Inspection　66　(1)　22-28　2017/01
Publisher: Japanese Society for Non-Destructive Inspection
ISSN： 0367-5866
Advancement of Nano-structured Thin Film for Magnetic Recording Media Based on Analysis of Physical Properties Invited Peer-reviewed

Shin Saito

Magnetics Japan　11　(2)　82-91　2016/04
Publisher: Magnetic Society of Japan
ISSN： 1880-7208
Fabrication process and control of nanostructures for granular perpendicular magnetic recording media; Breakthrough in HD media by low-gas-pressure process Invited Peer-reviewed

Shin Saito, Migaku Takahashi

Magnetics Japan　7　(1)　5-11　2012/02
Publisher: Magnetic Society of Japan
ISSN： 1880-7208
Remind again; Quality of thin film fabrication process Invited Peer-reviewed

Shin Saito, Michitaka Takasaki, Shinichi Ishibashi, Yoshito Ashizawa, Masanobu Onodera, Migaku Takahashi

Journal of the Vacuum Society of Japan　53　(9)　521-526　2010

DOI： 10.3131/jvsj2.53.521 　

ISSN： 1882-2398
グラニュラー型垂直磁気記録媒体における界面制御 Invited Peer-reviewed

Shin SAITO, Tomonori UENO, Shingo SASAKI, Migaku TAKAHASHI

Journal of Vacuum Society of Japan　51　(9)　578-582　2008/09
Publisher: The Vacuum Society of Japan
DOI： 10.3131/jvsj2.51.578 　

ISSN： 1882-2398

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For realizing perpendicular magnetic recording media (PRM) for hard disk drive (HDD), precisely controlled fabrication technology with angstrom scale according to the required properties is essential from material, processes, and physical view point. PRM presently consist of three functional parts; a soft magnetic underlayer (SUL), a nonmagnetic intermediate layer, and a recording layer (RL). The control of domain structure through interlayer coupling induced by RKKY-like interaction in SUL and narrower size distribution of the magnetic particles with magnetically decoupling in recording layer are indispensable for advanced PRM with high signal to noise ratio and thermal stability. In this paper, structure and magnetic properties for SUL and RL in a real fabricated PRM is discussed in connection with sputtering process parameters and also target materials.
Sputtering Target for Information Network Devices -Present and Future- Invited Peer-reviewed

Migaku TAKAHASHI, Shin SAITO, Masakiyo TSUNODA

Journal of Vacuum Society of Japan　49　2007/01

DOI： 10.3131/jvsj.50.22 　
Control of Microstructure and Interface of Magnetic Thin Films for Ultra High Density Data Storage Devices Invited Peer-reviewed

Migaku TAKAHASHI, Masakiyo TSUNODA, Shin SAITO

Journal of the Surface Finishing Society of Japan　56　(10)　558-564　2005/10

DOI： 10.4139/sfj.56.558 　
Kerr Microscope for Laboratory Observation of Micron-Scale Magnetic Domain Structure Invited Peer-reviewed

K. Akahane, E. Yanagisawa, S. Meguro, S. Saito, M. Takahashi

Journal of Magnetic Society of Japan　29　(8)　779-784　2005/08
Publisher: 日本応用磁気学会
ISSN： 0285-0192

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Since the performance of magnetic devices depends on the local magnetic properties of micron- or submicron-sized regions in their materials, the need for sophisticated observation of magnetic domains is stronger than ever. The Kerr microscope has the great advantage of allowing easy handling and smooth observation without any auxiliary preparation. In this report, we describe two types of Kerr microscope using the scanning method and the photographic method, which allow both in-plane and out-of-plane domain observation. Recent results of domain observation of elements or materials used in magnetic recording devices and spintronics devices are also briefly introduced.

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Books and Other Publications 2

薄膜工学第3版

金原粲, 吉田貞史, 近藤高志, 北川雅俊, 須田淳, 森本章治, 杉山正和, 宇山晴夫, 田畑仁, 酒井朗, 宮崎誠一, 佐々木信也, 浅野種正, 藤原康文, 潮嘉次郎, 大見俊一郎, 斉藤伸, 関谷毅, 德田崇

丸善出版　2016/11/30
薄膜工学第2版

金原粲, 多賀康訓, 吉田貞史, 森本章治, 宮崎誠一, 杉山正和, 藤田浩, 安藤富雄, 田畑仁, 酒井朗, 北川雅俊, 馬場茂, 財満鎮明, 近藤高志, 尾山卓司, 浅野種正, 高橋研, 斉藤伸, 二本正昭, 高井治, 八瀬清志

丸善出版　2011/06

Presentations 355

MgO/bcc-CrMn積層下地層の表面形態とその上に成膜したFePt薄膜の磁気特性

齊藤節, 清水章弘, 斉藤伸

電子情報通信学会磁気記録・情報ストレージ研究会、映像情報メディア学会マルチメディアストレージ研究会共催研究会　2019/06/13

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MRIS2019-6
The network-shaped upheaval structure in (002) textured MgO layer for L1₀ FePt-based granular media with columnar nanostructure International-presentation

A. Shimizu, S. Hinata, S. Jo, Shin Saito

14th Joint MMM-INTERMAG Conference　2019/01/17
Large uniaxial anisotropy Co₅₀(Pt_1-xRh_x)₅₀ thin films for microwave assisted magnetic recording International-presentation

D. Kumar, T. Jin, V. Chaudhary, K. Tham, S. Saito, S. Piramanayagam

14th Joint MMM-INTERMAG Conference　2019/01/17
Challenge to the synthesis of α”-(Fe, Co)₁₆N₂ nanoparticles obtained by hydrogen reduction and subsequent nitrogenation starting from α-(Fe, Co)OOH International-presentation

M. Tobise, S. Saito, M. Doi

14th Joint MMM-INTERMAG Conference　2019/01/17
Proposal of granular-type capping layer with high K_u CoPt grains and ferromagnetic oxide grain boundaries for full granular cap media International-presentation

K. Tham, R. Kushibiki, T. Kamada, S. Saito

14th Joint MMM-INTERMAG Conference　2019/01/16
Near infrared magneto-optical reflectance changes for antiferro-magnetically exchange coupled Co/Ru multilayer films International-presentation

S. Saito, H. Sato, K. Ooki, S. Kinno, K. Akahane, H. Uchida

14th Joint MMM-INTERMAG Conference　2019/01/15
表面プラズモン励起による近赤外磁気光学効果の増強 ― Co/Ru多層膜の磁気カー効果とマグネトリフラクティブ効果 ― Invited

斉藤伸

第220回日本磁気学会研究会　2018/11/22

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中央大学，駿河台記念館320号室, 東京
垂直磁気記録媒体用コンポジットターゲットとCoPt酸化物グラニュラ膜

タムキムコング, 櫛引了輔, 斉藤伸

2018/11/02

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長岡技術科学大学, 物質・材料1号棟大学院講義室, 長岡市, MAG18-115
Challenge to the synthesis of semi-hard α”-(Fe, Co)₁₆N₂ nanoparticles obtained by hydrogen reduction and subsequent nitrogenation starting from α-(Fe, Co)OOH

Masahiro Tobise, Shin Saito

2018/09/13
Strobe method magnetic domain observation of oriented electrical steel sheet in condition of excitation using LED light source

Y. Odagiri, E. Yanagisawa, S. Meguro, S. Saito

2018/09/13
Enhancement of NIR magneto-refractive effect for Co/Ru multilayer film by surface plasmon resonance

S. Saito, K. Ooki, K. Akahane, H. Uchida

2018/09/13
Condition of surface plasmon resonance in near-infrared region for magnetic multilayer film

S. Saito, K. Ooki, K. Akahane, H. Uchida

2018/09/13
Development of compact and convenient HAMR evaluation equipment

K. Akahane, S. Meguro, S. Saito

2018/09/12
Proposal of network-formed upheaval structure using grain boundary diffusion in underlayer for L1₀ FePt-based granular media with columnar nanostructure

Akihiro Shimizu, Shintaro Hinata, Shin Jo, Shin Saito

2018/09/12
Intergranular exchange decoupling of CoPt-B2O3 granular media by introducing RuCoCr-oxide buffer layer

Kim Kong Tham, Ryosuke Kushibiki, Tomonari Kamada, Shin Saito

2018/09/11
FDTD simulation of optical and magnetooptical response for composite structure with rectangularly arranged Au particles/Bi: YIG

Y. Itabashi, J. Schlipf, K. Ooki, S. Saito, T. Goto, Y. Nakamura, P. B. Lim, I. Fischer, J. Schulze, H. Uchida, M. Inoue

2018/09/11
LARGE UNIAXIAL ANISOTROPY Co₅₀(Pt_1-xRh_x)₅₀ THIN FILMS FOR MICROWAVE ASSISTED MAGNETIC RECORDING International-presentation

Durgesh Kumar, Tianli Jin, Tham Kim Kong, Shin Saito, S. N. Piramanayagam

The 29th Magnetic Recording Conference (TMRC 2018)　2018/08/08

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Western Digital Milpitas Campus, Milpitas, California, USA, P1-14
Ion Implantation Induced Disorder in FePt-C Thin Films International-presentation

Durgesh Kumar, Surbhi Gupta, Tham Kim Kong, R. Nongjai, Shin Saito, K. Asokan, S. N. Piramanayagam

The 29th Magnetic Recording Conference (TMRC 2018)　2018/08/08

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Western Digital Milpitas Campus, Milpitas, California, USA, P1-10
Observation of magnetic domain by compact magneto-optical Kerr effect microscope combination uses of probing apparatus

Yusuke Odagiri, Eiji Yanagisawa, Sakae Meguro, Shin Saito

2018/06/08
Synthesis and Magnetic Properties of α”-(Fe,Co)₁₆N₂ Nanoparticles Obtained HydrogenReduction of α-(Fe,Co)OOH and Subsequent Nitrogenation International-presentation

Masahiro Tobise, Shin Saito

5th International Conference of the Asian Union of Magnetics Societies (IcAUMS 2018)　2018/06/06

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Ramada Plaza Jeju Hotel, Jeju, Korea, G7-1784
Magneto-plasmonic Properties for Au/MnSb/Au Nanostructure at around Curie Temperature International-presentation

Shin Saito, Tatsuaki Sasaki

5th International Conference of the Asian Union of Magnetics Societies (IcAUMS 2018)　2018/06/05

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Ramada Plaza Jeju Hotel, Jeju, Korea, G10-2145
Angular Dependence of Low Field Microwave Absorption in NiFe Thin Film International-presentation

Dong Young Kim, Seok Soo Yoon, Shintaro Hinata, Shin Saito

5th International Conference of the Asian Union of Magnetics Societies (IcAUMS 2018)　2018/06/04

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Ramada Plaza Jeju Hotel, Jeju, Korea, G2-1036
Reduction of intergranular exchange coupling for CoPt-B₂O₃ granular media by employing a RuCoCr-oxide buffer layer with oxide of various melting points International-presentation

Kim Kong Tham, Ryosuke Kushibiki, Tomonari Kamada, Shintaro Hinata, Shin Saito

International Magnetics Conference (INTERMAG 2018)　2018/04/24

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Marina Bay Sands Convention Center, Singapore, Singapore, BQ-11
EFFECT OF UTILIZING MULTIPLE OXIDES ON MAGNETIC PROPERTIES AND MICROSTRUCTURE OF CoPt-B₂O₃ GRANULAR MEDIA International-presentation

Kim Kong Tham, Ryosuke Kushibiki, Shintaro Hinata, Shin Saito

Magnetics and Optics Research International Symposium 2018 (MORIS2018)　2018/01/09

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Queens College of CUNY, New York, USA, Tu-P-03
INFLUENCE OF CRISTALLINITY OF FERROMAGNETIC LAYER ON MAGNETO- REFRACTIVE EFFECT FOR Co_100-xB_x (x = 0, 12, 20)/Ru MULTILAYER FILM IN REFLECTION CONFIGURATION International-presentation

Shin Saito, Keisuke Ooki, Haruhiko Sato, Shiho Kinno, Koichi Akahane, Hironaga Uchida

Magnetics and Optics Research International Symposium 2018 (MORIS2018)　2018/01/08

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Queens College of CUNY, New York, USA, Mo-P-14
PLASMONIC ARTIFICIAL MAGNETIC LATTICE International-presentation

H. Uchida, K. Ooki, S. Saito, T. Goto, H. Takagi, P. B. Lim, Y. Nakamura, M. Inoue

Magnetics and Optics Research International Symposium 2018 (MORIS2018)　2018/01/08

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Queens College of CUNY, New York, USA, Mo-P-07
Au/MnSb/Au magneto-plasmonic nanostructure for the challenge of controlling self temperature device International-presentation

Shin Saito, Tatsuaki Sasaki

The 4th International Symposium on Advanced Magnetic Materials and Applications (ISAMMA 2017)　2017/12/10

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MMA-P10
Rotational hysteresis loss analysis for SiO₂ coated α”-Fe₁₆N₂ nanoparticles assembly International-presentation

Masahiro Tobise, Shin Saito

The 4th International Symposium on Advanced Magnetic Materials and Applications (ISAMMA 2017)　2017/12/10

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MNM-06
Volume ratio effect of dual oxides with different melting point on microstructure of high K_u Co₈₀Pt₂₀ granular media International-presentation

Kim Kong Tham, Ryosuke Kushibiki, Shintaro Hinata, Shin Saito

The 4th International Symposium on Advanced Magnetic Materials and Applications (ISAMMA 2017)　2017/12/10

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SMD-P4
Compact MOKE microscopes for a combination use with probing apparatus International-presentation

Yusuke ODAGIRI, Eiji YANAGISAWA, Sakae MEGURO, Shin SAITO

The 4th International Symposium on Advanced Magnetic Materials and Applications (ISAMMA 2017)　2017/12/10

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HSM-08
Q-band強磁性共鳴を用いたc面配向CoPtCr薄膜の実効ダンピング定数の評価

日向慎太朗, 斉藤伸

電気学会マグネティックス研究会　2017/11/17

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東北大学工学部、電子情報システム・応物系1号館大会議室、仙台、MAG17-151
Near infrared magneto-optical properties for antiferro-magnetically exchange coupled Co/Ru multilayer film International-presentation

Shin Saito, Haruhiko Sato, Keisuke Ooki, Hironaga Uchida

62nd Annual Conference on Magnetism and Magnetic Materials　2017/11/10

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GV-16
Nodule- and boundary wall- free MgO layer underlying (002) oriented L1₀ FePt layer for heat assisted magnetic recording media International-presentation

Shintaro Hinata, Shin Jo, Shin Saito

62nd Annual Conference on Magnetism and Magnetic Materials　2017/11/09

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EE-07
A challenge to reduction of intergranular exchange coupling and grain size for CoPt-based granular media: metal-oxide buffer layer and multiple oxides boundary materials International-presentation

Kim Kong Tham, Ryosuke Kushibiki, Tomonari Kamada, Shintaro Hinata, Shin Saito

62nd Annual Conference on Magnetism and Magnetic Materials　2017/11/07

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BQ-02
透過型配置におけるCo/Ru多層膜のマグネトリフラクティブ効果の近赤外波長依存性

大木敬介, 佐藤春彦, 赤羽浩一, 内田裕久, 斉藤伸

第41回日本磁気学会学術講演会　2017/09/19

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九州大学伊都キャンパス、 6pE-02
反射型配置におけるCo/Ru多層膜の近赤外磁気カー効果とマグネトリフラクティブ効果

斉藤伸, 佐藤春彦, 大木敬介, 赤羽浩一, 内田裕久

第41回日本磁気学会学術講演会　2017/09/19

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九州大学伊都キャンパス、 6pE-02
裏面照射型CMOSカメラによる広視野磁区観察装置の高性能化

目黒栄, 斉藤伸

第41回日本磁気学会学術講演会　2017/09/19

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九州大学伊都キャンパス、 6pE-02
μmスポットレーザ光による局所磁気履歴計測が可能な磁区観察顕微鏡

小田切雄介, 柳沢栄二, 目黒栄, 斉藤伸

第41回日本磁気学会学術講演会　2017/09/19

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九州大学伊都キャンパス、 6pE-02
L1₀ FePt-酸化物グラニュラ媒体のコラム状成長促進のための配向制御凹凸下地層の作製

清水章弘, 日向慎太朗, 岡田翼, 斉藤伸

第41回日本磁気学会学術講演会　2017/09/19

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九州大学伊都キャンパス、 6pE-02
熱アシスト磁気記録媒体用Co-Y合金薄膜の構造と磁気特性

日向慎太朗, 林下斐, 斉藤伸

第41回日本磁気学会学術講演会　2017/09/19

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九州大学伊都キャンパス、 6pE-02
CoPt-B₂O₃グラニュラ媒体の磁気特性と微細組織におよぼす異種酸化物の混合効果

タムキムコング, 櫛引了輔, 日向慎太朗, 斉藤伸

第41回日本磁気学会学術講演会　2017/09/19

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九州大学伊都キャンパス、 6pE-02
10⁵ dyne・cm対応トルク磁力計による六方晶Coバルク単結晶の一軸性トルク曲線の計測

中村壮太, 佐藤和也, 金野志保, 五月女容之, 日向慎太朗, 菊地敏明, 玉川克紀, 小川智之, 斉藤伸

第41回日本磁気学会学術講演会　2017/09/19

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九州大学伊都キャンパス、 6pE-02
SiO₂で表面被覆したα”-Fe₁₆N₂ナノ粒子の回転ヒステリシス損失解析

飛世正博, 斉藤伸

第41回日本磁気学会学術講演会　2017/09/19

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九州大学伊都キャンパス、 6pE-02
PROPOSAL OF GRAIN BOUNDARY OXIDES FOR HIGH K_u Co₈₀Pt₂₀ GRANULAR MEDIA WITH SMALL GRAIN SIZE International-presentation

Ryosuke KUSHIBIKI, Kim Kong THAM, Shintaro HINATA, Shin SAITO

The 28th Magnetic Recording Conference (TMRC 2017)　2017/08/02

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BP-08
FERROMAGNETIC RESONANCE FOR EXCHANGE-COUPLED TWO-DIMENSIONAL ASSEMBLY OF NANO-COLUMNS International-presentation

Shintaro HINATA, Daiji HASEGAWA, Shin SAITO

The 28th Magnetic Recording Conference (TMRC 2017)　2017/08/02

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BP-09
Ru ALLOY-OXIDE BUFFER LAYER FOR INTERGRANULAR EXCHANGE DECOUPLING FOR CoPt-B₂O₃ GRANULAR MEDIA International-presentation

Kim Kong THAM, Ryosuke KUSHIBIKI, Tomonari KAMADA, Shintaro HINATA, Shin SAITO

The 28th Magnetic Recording Conference (TMRC 2017)　2017/08/02

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BP-11
LOW STACKING FAULTS CoPtRu ALLOY AS A BUFFER LAYER MATERIAL FOR PERPENDICULAR MAGNETIC RECORDING MEDIA International-presentation

Yu SUZUKI, Ken INOUE, Shintaro HINATA, Shin SAITO

The 28th Magnetic Recording Conference (TMRC 2017)　2017/08/02

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BP-27
SIMULTANEOUS ACQUISITION OF MAGNETIC DOMAIN STRUCTURE AND LOCAL MAGNETIZATION CHARACTERISTICS DURING FIELD SWEEPING International-presentation

Yusuke ODAGIRI, Eiji YANAGISAWA, Sakae MEGURO, Shin SAITO

The 28th Magnetic Recording Conference (TMRC 2017)　2017/08/02

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BP-28
AMORPHOUS Cr-Ti LAYER FOR A HIGHLY (002) TEXTURED BCC Cr BASED ALLOY SEED LAYER FOR FePt-C HEAT-ASSISTED MAGNETIC RECORDING MEDIA International-presentation

Akihiro SHIMIZU, Seong-Jae JEON, Shintaro HINATA, Shin SAITO

The 28th Magnetic Recording Conference (TMRC 2017)　2017/08/02

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BP-29
Morphology and magnetic properties of α”-Fe₁₆N₂ nanoparticles synthesized from iron hydroxide with various kinds of shape International-presentation

M. Tobise, H. Amano, Y. Yamaguchi, Y. Nomura, S. Saito

International Magnetics Conference (INTERMAG 2017)　2017/04/26

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FN-02
Hexagonal closed packed CoPtRu alloy as a buffer layer material for promoting heteroepitaxial growth for perpendicular magnetic recording media International-presentation

Shintaro Hinata, Yu Suzuki, Ken Inoue, Shin Saito

International Magnetics Conference (INTERMAG 2017)　2017/04/25

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AR-01
Magnetic properties and microstructure for CoPt alloy granular films with grain boundary oxides of various melting points International-presentation

Ryosuke Kushibiki, Kim Kong Tham, Shintaro Hinata, Shin Saito

International Magnetics Conference (INTERMAG 2017)　2017/04/25

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AR-08
MnSb薄膜の赤外光光学特性のキュリー温度付近での温度変化特性

赤羽浩一, Seong-Jae Jeo, 斉藤伸

電気学会マグネティックス研究会　2017/03/10

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名古屋大学、IB電子情報館北棟8階IB081講義室、名古屋、MAG17-036
Co/Pt原子層積層スパッタ堆積による傾斜異方性膜の作製

本多直樹, 日向慎太朗, 斉藤伸

電子情報通信学会磁気記録・情報ストレージ研究会、映像情報メディア学会マルチメディアストレージ研究会共催研究会　2016/12/09

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愛媛大学、松山、MR2016-38
CoPtCrSiターゲットの酸素リアクティブスパッタリングによるCoPtCr-SiO₂グラニュラー薄膜の低ガス圧成膜

佐々木晋五, Kim Kong Tha, 日向慎太朗, 斉藤伸

第57回真空に関する連合講演会　2016/11/30

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1PA26
High K_u and small grain size Co₈₀Pt₂₀ granular media with double oxide grain boundary materials consisting of B₂O₃ International-presentation

Ryosuke Kushibiki, Kim Kong Tham, Shintaro Hinata, Shin Saito

61st Annual Conference on Magnetism and Magnetic Materials　2016/11/01

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AP-06
Effective damping factor for CoPt-based alloy film with stacking faults and compositional modulated atomic layered structure International-presentation

Shintaro Hinata, Shin Saito

61st Annual Conference on Magnetism and Magnetic Materials　2016/11/01

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AP-07
Layer stacked Co/Pt films with high perpendicular anisotropy sputter deposited at room temperature International-presentation

Naoki Honda, Shintaro Hinata, Shin Saito

61st Annual Conference on Magnetism and Magnetic Materials　2016/11/01

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AP-10
CoPt 基グラニュラ媒体の磁気特性と微細組織におよぼす粒界酸化物種の効果

タムキムコング, 櫛引了輔, 日向慎太朗, 斉藤伸

第40回日本磁気学会学術講演会　2016/09/08

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金沢大学角間キャンパス、8aB-01
局所領域の面内/ 垂直磁化成分同時測定Kerr効果測定装置の開発

小田切雄介, 柳沢栄二, 目黒栄, 斉藤伸

第40回日本磁気学会学術講演会　2016/09/07

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金沢大学角間キャンパス、7aB-01
Challenge to magnetization dynamics observation by Kerr microscope with real-time processing of differential-polarization images

S. Meguro, S. Saito

第40回日本磁気学会学術講演会　2016/09/06

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金沢大学角間キャンパス、6pC-03
α-FeOOHを用いて作製したα’-Fe₁₆N₂磁性ナノ粒子の磁気特性

飛世正博, 斉藤伸

第40回日本磁気学会学術講演会　2016/09/06

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金沢大学角間キャンパス、6pE-02
Q-band強磁性共鳴を用いたCoPt基グラニュラ媒体の異方性磁界分散の評価

日向慎太朗, 斉藤伸

電気学会マグネティックス研究会　2016/08/10

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電気学会マグネティックス研究会, 豊橋技術科学大学, 豊橋市, MAG16-104
磁気光学プラズモニック構造体における光学および磁気光学効果

内田裕久, 大木敬介, 斉藤伸, Fedyanin Andrey A, 後藤太一, 高木宏幸, 中村雄一, リムパンボイ, 井上光輝

電気学会マグネティックス研究会　2016/08/09

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電気学会マグネティックス研究会, 豊橋技術科学大学, 豊橋市, MAG16-101
Rotational hysteresis loss analysis for randomly oriented α”-Fe₁₆N₂ nanoparticles assembly International-presentation

Masahiro Tobise, Tomoyuki Ogawa, Shin Saito

4th International Conference of the Asian Union of Magnetics Societies (ICAUMS 2014)　2016/08/03

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DA-03
Ferromagnetic resonance for CoPtCr-based granular media with intergranular exchange coupling International-presentation

Shin Saito, Sintaro Hinata, Daiji Hasegawa

4th International Conference of the Asian Union of Magnetics Societies (ICAUMS 2014)　2016/08/03

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DC-02
CoPt-B₂O₃ granular media with high K_u and low intergranular exchange coupling International-presentation

Kim Kong Tham, Sintaro Hinata, Shin Saito

4th International Conference of the Asian Union of Magnetics Societies (ICAUMS 2014)　2016/08/02

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PG-05
Curie temperature measurement of FePt film by infrared reflectivity International-presentation

Seong-Jae Jeon, Koichi Akahane, Shin Saito

4th International Conference of the Asian Union of Magnetics Societies (ICAUMS 2014)　2016/08/01

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AC-05
粒間相互作用を有するCoPt基グラニュラ媒体のQ-band強磁性共鳴によるキャラクタリゼーション

日向慎太朗, 長谷川大二, 斉藤伸

電子情報通信学会磁気記録・情報ストレージ研究会、映像情報メディア学会マルチメディアストレージ研究会共催研究会　2016/06/09

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東北大学電気通信研究所、MR2016-1
Compositional dependence of Cr_100-xTi_x texture-inducing layer underlying (002) textured bcc-Cr alloy seed layer for FePt-C based heat-assisted magnetic recording media

Jeon Seong-Jae, Shintaro Hinata, Shin Saito

電子情報通信学会磁気記録・情報ストレージ研究会、映像情報メディア学会マルチメディアストレージ研究会共催研究会　2016/06/09

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東北大学電気通信研究所、MR2016-2
CoPt基グラニュラ媒体の磁気特性におよぼす粒界酸化物種の効果

タムキムコング, 櫛引了輔, 日向慎太朗, 斉藤伸

電子情報通信学会磁気記録・情報ストレージ研究会、映像情報メディア学会マルチメディアストレージ研究会共催研究会　2016/06/09

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東北大学電気通信研究所、MR2016-3
Centimeter-order view for magnetic domain imaging with local magnetization direction by longitudinal Kerr effect International-presentation

S. Meguro, K. Akahane, S. Saito

13th Joint MMM/Intermag Conference　2016/01/14

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(FW-09)
Effective damping factor for stacked medium with CoPt continuous/ CoPt-SiO₂ granular film International-presentation

S. Hinata, S. Saito

13th Joint MMM/Intermag Conference　2016/01/14
Effect of additional elements on compositional modulated atomic layered structure of hexagonal Co₈₀Pt₂₀ alloy films with superlattice diffraction International-presentation

S. Hinata, A. Yamane, S. Saito

13th Joint MMM/Intermag Conference　2016/01/12

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AU-07
VARIATION OF EFFECTIVE DAMPING FACTOR FOR COPT-BASED ALLOY FILMS WITH VARIOUS ATOMIC STACKING STRUCTURES International-presentation

S. Hinata, S. Saito

15th Magnetics and Optics Research International Symposium (MORIS 2015)　2015/12/01

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TU-P-02
HIGH COERCIVITY COPT-OXIDE GRANULAR FILMS WITH LOW MELTING POINT OXIDE International-presentation

K. K. Tham, S. Hinata, S. Saito

15th Magnetics and Optics Research International Symposium (MORIS 2015)　2015/12/01

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TU-P-03
MAGNETIC DOMAIN OBSERVATION SYSTEM WITH DETERMINATION OF THE THREE-DIMENSIONAL LOCAL MAGNETIZATION DIRECTION International-presentation

S. Meguro, K. Akahane, S. Saito

15th Magnetics and Optics Research International Symposium (MORIS 2015)　2015/11/30

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MO-P-14
OPTICAL AND MAGNETO-OPTICAL RESPONCES ON PLASMONIC COMPOSITE STRUCTURES WITH SQUARELY ARRANGED GOLD PARTICLES AND MAGNETIC GARNET International-presentation

H. Uchida, K. Ooki, H. Sato, S. Saito, Y. Mizutani, K. Isogai, M. Inoue

15th Magnetics and Optics Research International Symposium (MORIS 2015)　2015/11/30

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MO-P-15
RKKY的層間結合膜の光学特性に現れるスピン依存散乱の効果

佐藤春彦, 斉藤伸, 水野翔太, 赤羽浩一, 内田裕久

平成27年電気学会基礎・材料・共通部門大会　2015/09/18

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金沢大学角間キャンパス自然科学本館、18-B-p2-1
CoPt 基合金/グラニュラ積層媒体の実効ダンピングファクター

日向慎太朗, 斉藤伸

第39回日本磁気学会学術講演会　2015/09/11

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名古屋大学東山キャンパス、11aD-06
六方晶Co₈₀Pt₂₀合金薄膜の原子層組成変調構造に及ぼす添加元素の効果 (I)

日向慎太朗, 山根明, 斉藤伸

第39回日本磁気学会学術講演会　2015/09/11

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名古屋大学東山キャンパス、11aD-07
六方晶Co₈₀Pt₂₀合金薄膜の原子層組成変調構造に及ぼす添加元素の効果 (II)

日向慎太朗, 山根明, 斉藤伸

第39回日本磁気学会学術講演会　2015/09/11

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名古屋大学東山キャンパス、11aD-08
MgO/Rh/Fe_100-xCo_x 膜の正方歪と一軸磁気異方性

吉田真司, 潟口嵩, 髙橋海里, 金谷峻介, 大宮裕之, 荒川明, 長谷川崇, 早坂浩二, 斉藤伸, 石尾俊二

第39回日本磁気学会学術講演会　2015/09/10

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名古屋大学東山キャンパス、10aC-09
六方晶Co₈₀Pt₂₀合金薄膜の原子層積層構造におよぼす下地層凹凸の影響

タムキムコング, 日向慎太朗, 斉藤伸

第39回日本磁気学会学術講演会　2015/09/10

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名古屋大学東山キャンパス、10aC-11
赤外光を用いたキュリー温度測定システムの開発

赤羽浩一, 佐藤春彦, 斉藤伸

第39回日本磁気学会学術講演会　2015/09/10

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名古屋大学東山キャンパス、10pD-09
磁気Kerr 効果測定／変位校正機能を備えた10^-8オーダの薄膜磁歪測定装置の開発

目黒栄, 飯田達矢, 旗持純, 小田切雄介, 斉藤伸

第39回日本磁気学会学術講演会　2015/09/08

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名古屋大学東山キャンパス、8aD-10
Au/Bi:YIG 周期構造体の光学および磁気光学応答

内田裕久, 大木敬介, 佐藤春彦, 磯谷亮介, 斉藤伸, 井上光輝

第39回日本磁気学会学術講演会　2015/09/08

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名古屋大学東山キャンパス、8pB-03
Co/Ru 多層膜におけるマグネトリフラクティブ効果の近赤外域での波長依存性

佐藤春彦, 水野翔太, 赤羽浩一, 内田裕久, 斉藤伸

第39回日本磁気学会学術講演会　2015/09/08

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名古屋大学東山キャンパス、8pB-06
無配向α^”-Fe₁₆N₂ナノ粒子集合体の回転ヒステリシス損失解析

飛世正博, 小川智之, 斉藤伸

第39回日本磁気学会学術講演会　2015/09/08

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名古屋大学東山キャンパス、8pC-15
CoPt基グラニュラ薄膜の歳差運動に及ぼす磁化反転状態の効果

佐藤春彦, 水野翔太, 赤羽浩一, 斉藤伸, 内田裕久

電気学会マグネティックス研究会　2015/08/05

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電気学会マグネティックス研究会, 長岡技術科学大学、長岡、MAG15-087
Effective Damping Factor for CoPt-based Granular Media with Reversed Domains (Invited) International-presentation

Sintaro Hinata, Shin Saito

7th International Conference on Materials for Advanced Technologies (ICMAT 2013) & 16th IUMRS International Conference in Asia (IUMRS-ICA2015)　2015/07/01

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(X6-1, ICMAT15-A-3990)
基板加熱成膜により作製したCoPtCr-SiO₂グラニュラ媒体の成長組織と磁気特性

日向慎太朗, タムキムコング, 斉藤伸

電子情報通信学会磁気記録・情報ストレージ研究会、映像情報メディア学会マルチメディアストレージ研究会共催研究会　2015/06/05

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東北大学電気通信研究所、MR2015-9
CoPt基グラニュラ媒体の磁気特性及び微細組織へのポストアニールの効果

タムキムコング, 日向慎太朗, 斉藤伸

電子情報通信学会磁気記録・情報ストレージ研究会、映像情報メディア学会マルチメディアストレージ研究会共催研究会　2015/06/05

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東北大学電気通信研究所、MR2015-10
Co/Ru多層膜のマグネトリフラクティブ効果の積層構造依存性

佐藤春彦, 水野翔太, 斉藤伸, 赤羽浩一, 内田裕久

平成27年東北地区若手研究者研究発表会「音・光・電波・エネルギー・システムとその応用」　2015/02/28

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日本大学工学部、YS-13-D13
室温作製Co/Pt積層膜の磁気特性の積層構造依存性

土屋垂穂, 本多直樹, 内田裕久, 斉藤伸, 日向慎太朗

電子情報通信学会磁気記録・情報ストレージ研究会、映像情報メディア学会マルチメディアストレージ研究会共催研究会　2014/12/12

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愛媛大学、松山、MR2014-38
FDTD法による磁気光学プラズモニック構造体の光学応答の検討

大木敬介, 大槻健也, 佐藤丈敏, 佐藤春彦, Fedyanin Andrey, 斉藤伸, 内田裕久, 井上光輝

電気学会マグネティックス研究会　2014/12/12

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日本大学理工学部船橋キャンパス先端材料科学センター、船橋、MAG14-191
反強磁性的層間結合多層膜の光学応答に現れるスピン依存散乱の効果

佐藤春彦, 水野翔太, 赤羽浩一, 斉藤伸, 内田裕久

電気学会マグネティックス研究会　2014/12/12

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日本大学理工学部船橋キャンパス先端材料科学センター、船橋、MAG14-198
Compositional modulated atomic layer stacking and uniaxial magnetocrystalline anisotropy of CoPt alloy sputtered films with close-packed plane orientation International-presentation

Shin Saito, Naoki Nozawa, Shintaro Hinata, Migaku Takahashi, Kazunari Shibuya, Kazuya Hoshino, Satoru Awaya

59th Annual Conference on Magnetism and Magnetic Materials　2014/11/07

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GU-03
Metal-oxide buffer layer for maintaining topological bumpy surface underlayer of columnar CoPt-SiO₂ granular media deposited at high substrate temperature International-presentation

Kim Kong Tham, Shintaro Hinata, Shin Saito, Migaku Takahashi

59th Annual Conference on Magnetism and Magnetic Materials　2014/11/06

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FQ-08
Effect of large grain CrMn seed layer on magnetic properties of FePt-C granular media International-presentation

Seong-Jae Jeon, Sintaro Hinata, Shin Saito, Migaku Takahashi

59th Annual Conference on Magnetism and Magnetic Materials　2014/11/06

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FQ-16
Effect of capping layer on effective damping factor for CoPtCr-SiO₂ media with exchange coupled up- and downwardly magnetized domains International-presentation

Sintaro Hinata, Shin Saito, Sahashi Masashi

59th Annual Conference on Magnetism and Magnetic Materials　2014/11/04

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BP-11
Effect of grain size of seed layer on magnetic property of FePt-C granular film International-presentation

Seong-Jae Jeon, Sintaro Hinata, Shin Saito, Migaku Takahashi

3rd International Conference of the Asian Union of Magnetics Societies (ICAUMS 2014)　2014/10/30

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???-??
Thermally Assisted Magnetic Recording Applying Localized Plasmon Effect with Ultra Short Laser Pulse International-presentation

Hiroshi Mano, Hiroki Yoshikawa, Yoshito Ashizawa, Arata Tsukamoto, Yuzo Sasaki, Shin Saito, Migaku Takahashi, Shinichiro Ohnuki, Katsuji Nakagawa

3rd International Conference of the Asian Union of Magnetics Societies (ICAUMS 2014)　2014/10/30

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???-??
積層欠陥を含むhcp Coの磁気異方性に関する第一原理計算

小峰啓史, 斉藤伸

第38回日本磁気学会学術講演会　2014/09/05

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慶應大学日吉キャンパス、5aC-10
MgO(001)基板上に成長させたRh/FeCo膜の磁気特性

大宮裕之, 吉田真司, 王博羽中, 金谷峻介, 高橋海里, 荒川明, 長谷川崇, 斉藤伸, 石尾俊二

第38回日本磁気学会学術講演会　2014/09/04

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慶應大学日吉キャンパス、4aE-1
超短パルスレーザによる局所プラズモン効果を用いた熱アシスト磁気記録

眞野敬史, 吉川大貴, 芦澤好人, 塚本新, 佐々木有三, 斉藤伸, 高橋研, 大貫進一郎, 中川活二

第38回日本磁気学会学術講演会　2014/09/03

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慶應大学日吉キャンパス、3aA-5
稠密面配向CoPt 合金スパッタ薄膜の原子積層構造および一軸結晶磁気異方性（Ⅰ）

斉藤伸, 野沢直樹, 日向慎太朗, 高橋研

第38回日本磁気学会学術講演会　2014/09/03

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慶應大学日吉キャンパス、3pE-4
稠密面配向CoPt 合金スパッタ薄膜の原子積層構造および一軸結晶磁気異方性（Ⅱ）

斉藤伸, 野沢直樹, 日向慎太朗, 高橋研, 澁谷一成, 星野和哉, 粟屋聡

第38回日本磁気学会学術講演会　2014/09/03

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慶應大学日吉キャンパス、3pE-5
Large grain size of Cr seed layer deposited on CrTi amorphous layer for future high K_u FePt-C granular medium

全成宰, 日向慎太朗, 斉藤伸, 高橋研

第38回日本磁気学会学術講演会　2014/09/02

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慶應大学日吉キャンパス、2pA-2
CoPt-WO₃ グラニュラ媒体の磁気特性及び微細組織へのポストアニールの効果

タムキムコング, 日向慎太朗, 斉藤伸, 高橋研

第38回日本磁気学会学術講演会　2014/09/02

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慶應大学日吉キャンパス、2pA-10
CoPtCr-SiO₂ 媒体の反転磁区形成時の実効ダンピング定数

日向慎太朗, 斉藤伸, 高橋研, 佐橋政司

第38回日本磁気学会学術講演会　2014/09/02

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慶應大学日吉キャンパス、2pA-13
CoPtCr-SiO₂ 媒体の反転磁界分布に及ぼすマイクロ波アシスト磁化反転の効果

日向慎太朗, 斉藤伸, 高橋研, 佐橋政司

第38回日本磁気学会学術講演会　2014/09/02

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慶應大学日吉キャンパス、2pA-14
Co/Ru多層膜の光学応答に現れるスピン依存散乱の効果

斉藤伸, 水野翔太, 赤羽浩一, 佐藤春彦, 内田裕久

第38回日本磁気学会学術講演会　2014/09/02

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慶應大学日吉キャンパス、2pC-10
Co/Ru多層膜の光学応答に現れるスピン依存散乱の効果

水野翔太, 斉藤伸, 赤羽浩一, 内田裕久

平成26年東北地区若手研究者研究発表会「音・光・電波・エネルギー・システムとその応用」　2014/02/28

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東北工業大学工学部、YS-12-B15
Kerr効果顕微鏡～微小偏光変化の高時間・空間分解能検出を求めて～

目黒栄, 斉藤伸, 柳沢栄二, 赤羽浩一, 高橋研

電気学会マグネティックス研究会　2013/12/11

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信州大学、長野、MAG13-124
Time Resolved Photographic Detection of Spatial Magnetic Field Distribution by Magneto-Optical Imaging Technique with Magnetic Transfer Film International-presentation

S. Meguro, K. Konishi, E. Yanagisawa, T. Ishibashi, S. Saito, M. Takahashi

14th Magnetics and Optics Research International Symposium (MORIS 2013)　2013/12/03

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Tu-03-04
Successful fabrication of high K_u columnar CoPt-SiO₂ granular film sputtered under high substrate temperature International-presentation

K. Tham, S. Hinata, S. Saito, M. Takahashi

58th Annual Conference on Magnetism and Magnetic Materials　2013/11/08

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HF-09
Alloying effect of Cr-based seed layer on control of sheet texture of MgO and thermal conductivity International-presentation

H. Yakabe, S. Hinata, S. Saito, M. Takahashi

58th Annual Conference on Magnetism and Magnetic Materials　2013/11/05

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BT-02
超高密度磁気記録媒体実現のための微細構造制御技術－現状と今後の課題－

高橋研, 斉藤伸

第74回応用物理学会秋季学術講演会　2013/09/16

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同志社大学京田辺キャンパス、16p-D1-2 分科企画シンポジウム (薄膜・表面)
CoPtCrSiターゲットのリアクティブスパッタリングによるCoPtCr-SiO₂グラニュラー膜の作製

佐々木晋五, 日向慎太朗, 斉藤伸, 高橋研, Kim Kong Tham

第37回日本磁気学会学術講演会　2013/09/06

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北海道大学工学部、6aD-5
加熱プロセスにより作製されたCoPtCr-SiO₂グラニュラ薄膜の構造制御（Ⅰ）－Ru下地層の再結晶化と下地上のグラニュラ磁性層の成長様式－

日向慎太朗, 斉藤伸, 井上健, 高橋研, 佐橋政司

第37回日本磁気学会学術講演会　2013/09/05

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北海道大学工学部、5aA-1
加熱プロセスにより作製されたCoPtCr-SiO₂グラニュラ薄膜の構造制御（Ⅱ）－CoCr-SiO₂バッファ層の導入によるコラム状成長磁性層の実現－

タムキムコング, 日向慎太朗, 斉藤伸, 高橋研

第37回日本磁気学会学術講演会　2013/09/05

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北海道大学工学部、5aA-2
規則線を有する合金スパッタ薄膜の原子層間組成変調構造－STEM–HAADF法による直接観察－

日向慎太朗, 斉藤伸, 野沢直樹, 星野和哉, 澁谷一成, 高橋研, 佐橋政司

第37回日本磁気学会学術講演会　2013/09/04

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北海道大学工学部、4aD-8
PtのRh置換によるCo₅₀Pt₅₀不規則合金薄膜の六方原子積層化と一軸結晶磁気異方性の増大

斉藤伸, 野沢直樹, 日向慎太朗, 高橋研

第37回日本磁気学会学術講演会　2013/09/04

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北海道大学工学部、4aD-9
強磁性金属薄膜の光学特性に及ぼすスピン依存散乱の効果

斉藤伸, 佐々木龍昭, 杜関祥, 王文秀, 高橋研

第37回日本磁気学会学術講演会　2013/09/03

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北海道大学工学部、3aF-6
高磁場Kerr効果顕微鏡における対物レンズのファラデー効果補正法

目黒栄, 柳沢栄二, 赤羽浩一, 斉藤伸, 高橋研

第37回日本磁気学会学術講演会　2013/09/03

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北海道大学工学部、3pF-3
Stacking Sequence Coherency And Chemical Ordering In hcp/fcc Transition Metal Alloys - Magnetocrystalline Anisotropy For hcp Co Based Alloys And fcc Non-Ferromagnetic Materials For Designed Pseudo-hcp Structure (Invited) International-presentation

Shin Saito, Shintaro Hinata, Migaku Takahashi

The 24th Magnetic Recording Conference (TMRC 2013)　2013/08/22

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(F6)
Stacking Sequence Coherency in hcp/fcc Transition Metal Alloys: Magnetocrystalline Anisotropy for hcp Co Based Alloys and Uniaxial Symmetry of Non-ferromagnetic Alloys with Stacking Faults. (Invited) International-presentation

Shin Saito, Migaku Takahashi

7th International Conference on Materials for Advanced Technologies (ICMAT 2013)　2013/07/01

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(T1-2, ICMAT13-A-1900)
エネルギーアシスト用垂直磁気記録媒体のための材料と評価法

斉藤伸, 日向慎太朗, 高橋研

スピニクス研究会　2013/06/21

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東北大学電気通信研究所
Spectrometric detection of magneto-optical hysteresis loop at single magnetic field sweep International-presentation

S. Saito, T. Sasaki, G. Du, M. Takahashi

12th Joint MMM/Intermag Conference　2013/01/18

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(HY-15)
Field induced magnetic anisotropy in Fe-based amorphous alloys International-presentation

D. Azuma, R. Hasegawa, S. Saito, M. Takahashi

12th Joint MMM/Intermag Conference　2013/01/17

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(EG-02)
Giant shifting in optical constants around Curie temperature for ferromagnetic metal in infrared region: a possible candidate for T_c measurement International-presentation

W. Wang, S. Saito, G. Du, M. Matsuda, M. Suzuki, M. Takahashi

12th Joint MMM/Intermag Conference　2013/01/15

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(AB-08)
Uniaxial magnetocrystalline anisotropy for hcp Co-Pt disordered alloy films by reducing the stacking faults with adding third element based on valence electron engineering International-presentation

N. Nozawa, S. Saito, S. Hinata, M. Takahashi

12th Joint MMM/Intermag Conference　2013/01/15

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(AV-05)
hcp積層および組成変調原子積層構造を有するCo-Irスパッタ薄膜の負の一軸結晶磁気異方性

野沢直樹, 斉藤伸, 木村拓也, 澁谷一成, 星野和哉, 日向慎太朗, 高橋研

平成24年度スピニクス特別研究会　2012/11/26

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秋田大学工学部、(12-6-12)
Q-band FMR; Characterization of magnetic properties for CoPt-based alloy films International-presentation

Shintaro Hinata, Shin Saito, Daiji Hasegawa, Migaku Takahashi

2nd International Conference of the Asian Union of Magnetics Societies (ICAUMS 2012)　2012/10/05

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5aB-05
Stacking sequence coherency in hcp/fcc transition metal alloys ― Magnetocrystalline anisotropy for hcp Co based alloys and fcc non-ferromagnetic materials for designed pseudo-hcp structure International-presentation

Shin Saito, Migaku Takahashi

2nd International Conference of the Asian Union of Magnetics Societies (ICAUMS 2012)　2012/10/03

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3aA-2
Giant negative uniaxial magnetocrystalline anisotropy of Co80Ir20 sputtered film with perfect hcp and composition modulated atomic layers International-presentation

Naoki Nozawa, Takuya Kimura, Kazunari Shibuya, Kazuya Hoshino, Shintaro Hinata, Shin Saito, Migaku Takahashi

2nd International Conference of the Asian Union of Magnetics Societies (ICAUMS 2012)　2012/10/03

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3pE-1
First principle study of hcp Co with stacking faults International-presentation

K. Iwai, T. Komine, S. Saito, R. Sugita

2nd International Conference of the Asian Union of Magnetics Societies (ICAUMS 2012)　2012/10/03

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4pPS-12
Thermally Assisted Magnetic Recording Applying Optical Near Field with Ultra Short-Time Heating International-presentation

Atsumu Tajiri, Kyosuke Tamura, Shingo Toriumi, Yoshito Ashizawa, Katsuji Nakagawa, Arata Tsukamoto, Akiyoshi Itoh, Yuzo Sasaki, Shin Saito, Migaku Takahashi, Shinichiro Ohnuki

2nd International Conference of the Asian Union of Magnetics Societies (ICAUMS 2012)　2012/10/02

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2pA-2
Parallel measurements of magnetic hysteresis loop and magneto-optical effect by spectrometric detection International-presentation

Guan Xiang Du, Tatsuaki Sasaki, Shin Saito, Migaku Takahashi

2nd International Conference of the Asian Union of Magnetics Societies (ICAUMS 2012)　2012/10/02

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2pPS-16
Impurity gas analysis in the sputtering process under high Ar gas pressure International-presentation

Shingo Sasaki, Shinichi Ishibashi, Shin Saito, Migaku Takahashi

2nd International Conference of the Asian Union of Magnetics Societies (ICAUMS 2012)　2012/10/02

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2pPS-76
Influence of magnetic dipole interaction on ferromagnetic resonance in nanoparticle assembly International-presentation

Daiji Hasegawa, Shin Saito, Migaku Takahashi

2nd International Conference of the Asian Union of Magnetics Societies (ICAUMS 2012)　2012/10/02

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2pPS-85
Photographic Detection of Spatial Magnetic Field Distribution by Magneto-Optical Imaging Technique with Magnetic Transfer Film International-presentation

S. Meguro, Y. Konishi, E. Yanagisawa, T. Ishibashi, S. Saito, M. Takahashi

2nd International Conference of the Asian Union of Magnetics Societies (ICAUMS 2012)　2012/10/02

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2pPS-105
Efficient Approach to Measure Crystallization Temperature by Infrared Reflectivity International-presentation

Wen-Xiu Wang, Shin Saito, Hidetaka Yakabe, Migaku Takahashi

2nd International Conference of the Asian Union of Magnetics Societies (ICAUMS 2012)　2012/10/02

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2pPS-137
Quantification of inter granular exchange coupling for stacked media by analyzing energy state of magnetic domain structure International-presentation

Kim Kong Tham, Daiji Hasegawa, Norikazu Itagaki, Shintaro Hinata, Shinichi Ishibashi, Shin Saito, Migaku Takahashi

2nd International Conference of the Asian Union of Magnetics Societies (ICAUMS 2012)　2012/10/02

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2pPS-140
Au膜への表面プラズモン励起による増強型磁気光学効果をプローブとした空間磁場の走査型検出

斉藤伸, 鈴木理明, 杜関祥, 高橋研

平成24年電気学会基礎・材料・共通部門大会　2012/09/21

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秋田大学手形キャンパス、B-6
磁気転写膜と広視野磁区観察装置を用いた空間磁場の一括観察法

目黒栄, 小西泰司, 柳沢栄二, 石橋隆幸, 斉藤伸, 高橋研

平成24年電気学会基礎・材料・共通部門大会　2012/09/21

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秋田大学手形キャンパス、B-7
磁気光学ヒステリシスループの分光検出法

杜関祥, 佐々木龍昭, 斉藤伸, 高橋研

平成24年電気学会基礎・材料・共通部門大会　2012/09/21

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秋田大学手形キャンパス、B-8
強磁性共鳴によるCo基グラニュラ型垂直磁気記録媒体のキャラクタリゼーション

日向慎太朗, 斉藤伸, 長谷川大二, 高橋研

電子情報通信学会磁気記録・情報ストレージ研究会、映像情報メディア学会マルチメディアストレージ研究会共催研究会　2012/07/20

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茨城大学工学部日立キャンパス
基板加熱成膜によるc面配向Coスパッタ薄膜の完全六方晶化

野沢直樹, 斉藤伸, 日向慎太朗, 高橋研

電子情報通信学会磁気記録・情報ストレージ研究会、映像情報メディア学会マルチメディアストレージ研究会共催研究会　2012/07/20

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茨城大学工学部日立キャンパス
磁気光学効果による2次元ナノ構造を有する貴金属のプラズモンモードの研究

杜関祥, 斉藤伸, 高橋研

電気学会マグネティックス研究会　2011/11/25

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青葉記念会館、仙台、MAG11-111
垂直磁気記録媒体用擬似六方晶薄膜における六方晶原子層積層のコヒーレンシー ―Ru代替材料の発見からCo基強磁性薄膜の結晶磁気異方性の向上まで―

斉藤伸, 高橋研

第52回真空に関する連合講演会　2011/11/18

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学習院創立百周年記念会館、東京、18Ba-10
グラニュラー型垂直磁気記録媒体における成長初期部への高ガス圧成膜層挿入による磁気的交換結合の抑制

佐々木晋五, 斉藤伸, 高橋研

第52回真空に関する連合講演会　2011/11/17

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学習院創立百周年記念会館、東京、17P-37
Quantitative Evaluation of Intergranular Exchange Field for Granular Media by Ferromagnetic Resonance International-presentation

Shintaro Hinata, Shin Saito, Daiji Hasegawa, Migaku Takahashi

56th Annual Conference on Magnetism and Magnetic Materials　2011/11/03

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GU-06
Domain structure and magnetization loss in a toroidal core International-presentation

Daichi Azuma, Ryusuke Hasegawa, Shin Saito, Migaku Takahashi

56th Annual Conference on Magnetism and Magnetic Materials　2011/11/01

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CB-02
逆磁区形成状況でのQ-band FMR測定によるグラニュラ型媒体の粒間交換結合磁界の定量評価

日向慎太朗, 斉藤伸, 長谷川大二, 高橋研

第35回日本磁気学会学術講演会　2011/09/29

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朱鷺メッセ新潟コンベンションセンター、29aA-6
c面配向Coスパッタ薄膜の原子積層構造の完全六方晶化（Ⅰ）

斉藤伸, 日向慎太朗, 高橋研

第35回日本磁気学会学術講演会　2011/09/29

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朱鷺メッセ新潟コンベンションセンター、29aA-9
c面配向Coスパッタ薄膜の原子積層構造の完全六方晶化（Ⅱ）

日向慎太朗, 斉藤伸, 木村拓也, 長谷川大二, 高橋研

第35回日本磁気学会学術講演会　2011/09/29

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朱鷺メッセ新潟コンベンションセンター、29aA-10
Faraday effect in plasmonic nanorod measured by laser diode

Guan-Xiang Du, Shin Saito, Migaku Takahashi

第35回日本磁気学会学術講演会　2011/09/29

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朱鷺メッセ新潟コンベンションセンター、29pE-7
CoPtCrグラニュラ媒体上に積層した近接場光アンテナによる熱アシスト磁気記録媒体

長勇次, 田尻集, 芦澤好人, 大貫進一郎, 中川活二, 佐々木有三, 斉藤伸, 高橋研

第35回日本磁気学会学術講演会　2011/09/28

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朱鷺メッセ新潟コンベンションセンター、28pA-2
3次元局所磁化方向の検出が可能な磁区観察装置の開発

目黒栄, 斉藤伸, 赤羽浩一, 高橋研

第35回日本磁気学会学術講演会　2011/09/27

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朱鷺メッセ新潟コンベンションセンター、27pD-13
Proposal of effective SFD evaluation by saturation field in minor loop International-presentation

Shintaro Hinata, Shin Saito, Norikazu Itagaki, Migaku Takahashi

International Magnetics Conference (INTERMAG 2011)　2011/04/28

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FW-04
Evaporated Ru layer for reduction of the interlayer thickness of perpendicular recording media International-presentation

Shin Saito, Ken Inoue, Migaku Takahashi

International Magnetics Conference (INTERMAG 2011)　2011/04/28

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FW-06
Magnetic field effect on the localized plasmon resonance in patterned noble metal nanostructures International-presentation

Guan Xiang Du, Shin Saito, Migaku Takahashi

International Magnetics Conference (INTERMAG 2011)　2011/04/27

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CT-04
The Role of Stacking Sequence Coherency on Magnetocrystalline Anisotropy for CoPt Based Granular Film and on Microstructure of Non-ferromagnetic Intermediate Layer International-presentation

Shin Saito, Migaku Takahashi

International Conference of Asia Union of Magnetic Societies　2010/12/08

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GC01
Simulating Magneto-optical Effect in Multilayers with Propagating Surface Plasmon International-presentation

Guan Xiang Du, Shin Saito, Michiaki Suzuki, Migaku Takahashi

International Conference of Asia Union of Magnetic Societies　2010/12/08

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IT02
CoPtCr-based Granular Films for Thermally Assisted Magnetic Recording International-presentation

Y. Ashizawa, S. Saito, Y. Osa, A. Tajiri, K. Inoue, M. Takahashi, K. Nakagawa

International Conference of Asia Union of Magnetic Societies　2010/12/08

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GC04
Oblique-incidence sputtering of Ru for reduction of the interlayer thickness of perpendicular recording media International-presentation

Shin Saito, Ken Inoue, Migaku Takahashi

55th Annual Conference on Magnetism and Magnetic Materials　2010/11/15

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BW-01
低ガス圧プロセスでのCo基グラニュラー磁性膜作製のためのCo基貴金属+CoSi+CoO焼結ターゲットの提案

佐々木晋五, 斉藤伸, 高橋研

第34回日本磁気学会学術講演会　2010/09/07

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つくば国際会議場、7aA-1
c面配向Co-Pt-Ru擬似六方晶合金薄膜の積層欠陥の定量評価

鈴木雄, 斉藤伸, 日向慎太朗, 井上健, 高橋研

第34回日本磁気学会学術講演会　2010/09/07

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つくば国際会議場、7aA-2
局所磁化方向の検出が可能なmmオーダーの広視野磁区観察装置の開発

目黒栄, 斉藤伸, 赤羽浩一, 高橋研

第34回日本磁気学会学術講演会　2010/09/07

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つくば国際会議場、7aF-10
強磁性共鳴を用いた積層垂直記録媒体の層間結合評価～LLG計算による解析

長谷川大二, 日向慎太朗, 斉藤伸, 高橋研

第34回日本磁気学会学術講演会　2010/09/07

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つくば国際会議場、7pA-2
Q-band FMRを用いた積層媒体の層間結合の定量評価

日向慎太朗, 斉藤伸, 長谷川大二, 高橋研

第34回日本磁気学会学術講演会　2010/09/07

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つくば国際会議場、7pA-6
斜め入射成膜による垂直磁気記録媒体用Ru中間層の薄膜化

井上健, 斉藤伸, 高橋研

第34回日本磁気学会学術講演会　2010/09/07

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つくば国際会議場、7pA-5
Magnetic isolation for Hf-capped CoPtCr-SiO₂ perpendicular media by post-annealing International-presentation

S. Hinata, S. Saito, M. Takahashi

The 2nd International Symposium on Advanced Magnetic Materials and Applications　2010/07/16

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SF-06
Effect of Deposition under low-Ar-gas-pressure on microstructure in Co-Si-O granular film International-presentation

S. Sasaki, S. Saito, M. Takahashi

The 2nd International Symposium on Advanced Magnetic Materials and Applications　2010/07/16

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SF-07
Grain growth of Ru interlayer on Ni-W seed layer International-presentation

T. Ueno, M. Fujimoto, S. Saito, S. Ishibashi, N. Itagaki, M. Takahashi

The 2nd International Symposium on Advanced Magnetic Materials and Applications　2010/07/16

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SF-08
Synthetic-antiferromagnetic coupling in Subnanocrystalline FeCoB/Rh/FeCoB films International-presentation

W. X. Xia, K. Inoue, S. Saito, M. Takahashi

The 2nd International Symposium on Advanced Magnetic Materials and Applications　2010/07/16

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SF-10
Quantitative evaluation of interlayer ferromagnetic coupling between granular and cap layers for perpendicular recording media International-presentation

K. K. Tham, S. Saito, N. Itagaki, S. Hinata, D. Hasegawa, M. Takahashi

The 2nd International Symposium on Advanced Magnetic Materials and Applications　2010/07/16

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SG-08
Evaluation of interlayer exchange coupling in the stacked perpendicular recording media by LLG calculation fitting of ferromagnetic resonance spectra International-presentation

D. Hasegawa, S. Hinata, S. Saito, M. Takahashi

The 2nd International Symposium on Advanced Magnetic Materials and Applications　2010/07/16

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SG-09
Influence of intergranular exchange coupling on reversal domain size for stacked perpendicular recording media — LLG calculation — International-presentation

D. Hasegawa, K. K. Tham, S. Saito, M. Takahashi

The 2nd International Symposium on Advanced Magnetic Materials and Applications　2010/07/16

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SG-09
Plasmon enhanced Faraday ellipticity in nanodisk array International-presentation

G. X. Du, T. Mori, S. Saito, H. Fukuda, M. Takahashi

The 2nd International Symposium on Advanced Magnetic Materials and Applications　2010/07/15

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EY-07
Stacking Faults and uniaxial magnetocrystalline anisotropy for c-plane oriented CoPtRu films International-presentation

Y. Suzuki, S. Saito, S. Hinata, K. Inoue, M. Takahashi

The 2nd International Symposium on Advanced Magnetic Materials and Applications　2010/07/13

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PA-10
Material guide for formation of stacking faults in pseudo-hcp structure International-presentation

S. Saito, M. Takahashi

The 2nd International Symposium on Advanced Magnetic Materials and Applications　2010/07/13

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PA-15
垂直磁気記録媒体のための擬似六方晶薄膜の開発

斉藤伸, 高橋研

電子情報通信学会磁気記録・情報ストレージ研究会、映像情報メディア学会マルチメディアストレージ研究会共催研究会　2010/07/08

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茨城大学工学部日立キャンパス
mmオーダーの磁区観察可能な広視野縦Kerr効果ベクトル磁区観察装置の開発

目黒栄, 斉藤伸, 赤羽浩一, 高橋研

電子情報通信学会磁気記録・情報ストレージ研究会、映像情報メディア学会マルチメディアストレージ研究会共催研究会　2010/07/08

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茨城大学工学部日立キャンパス
Evaluation of the Interlayer Ferromagnetic Coupling in Stacked Perpendicular Recording Media using Q-band Ferro Magnetic Resonance International-presentation

Shintaro Hinata, Shin Saito, Daiji Hasegawa, Migaku Takahashi

The 9th Perpendicular Magnetic Recording Conference　2010/05/18

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18aD-12
Evaluation of Inter-granular Coupling in Stacked Perpendicular Recording Media International-presentation

Kim Kong Tham, Shin Saito, Norikazu Itagaki, Shintaro Hinata, Daiji Hasegawa, Migaku Takahashi

The 9th Perpendicular Magnetic Recording Conference　2010/05/18

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18aD-13
Proposal of metal-CoSi-CoO sintered target for low gas pressure deposition of CoPtCr-SiO₂ granular media International-presentation

Shingo Sasaki, Shin Saito, Migaku Takahashi

The 9th Perpendicular Magnetic Recording Conference　2010/05/18

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18aD-23
Current Perspectives of CoPt Based Granular Media -Materials and Processes- International-presentation

Migaku Takahashi, Shin Saito

The 9th Perpendicular Magnetic Recording Conference　2010/05/17

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17pA-3
NiFe/GaAs ハイブリッド構造の室温ゼロ磁場におけるスピン相互作用

西林一彦, 川添忠, 斉藤伸, 高橋研, 守哲司, 福田浩章, 大津元一

2010年春季第57回応用物理学関係連合講演会　2010/03/18

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東海大学湘南キャンパス、17p-ZH-10
超高周波帯超音波トランスデューサ用多結晶ZnO薄膜の作製

高麗友輔, 高橋正太, 石川一夫, 荒川元孝, 櫛引淳一, 斉藤伸, 高橋研

2010年春季第57回応用物理学関係連合講演会　2010/03/17

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東海大学湘南キャンパス、17p-R-10
Growth mechanism of granular-type magnetic layer on Ru intermediate layer in perpendicular recording media International-presentation

Norikazu Itagaki, Shin Saito, Migaku Takahashi

11th Joint MMM/Intermag Conference　2010/01/20

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(CX-08)
Magneto-optic effect in nano sandwich array with plasmonic structure of Au/[Co/Pt]n/Au International-presentation

Guanxiang Du, Tetsuji Mori, Michiaki Suzuki, Shin Saito, Hiroaki Fukuda, Migaku Takahashi

11th Joint MMM/Intermag Conference　2010/01/20

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(DF-04)
Q-band Ferro Magnetic Resonance in stacked perpendicular magnetic recording media International-presentation

Shintaro Hinata, Shin Saito, Migaku Takahashi

11th Joint MMM/Intermag Conference　2010/01/20

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(ED-06)
Probing magneto-optical properties of non-magnetic metals in Kretschmann configuration International-presentation

Shin Saito, Michiaki Suzuki, Guang Xiang Du, Migaku Takahashi

11th Joint MMM/Intermag Conference　2010/01/19

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(BU-09)
Plasmonic nanodisk array with enhanced magneto-optical effect

Guanxiang Du, Tetsuji Mori, Michiaki Suzuki, Shin Saito, Hiroaki Fukuda, Migaku Takahashi

日本磁気学会第32回ナノマグネティックス専門研究会　2009/11/27

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日本大学理工学部駿河台校舎
表面プラズモンを励起したCoFeB/ Au積層膜の縦カー効果

斉藤伸, 鈴木理明, 杜関祥, 守哲司, 福田浩章, 高橋研

平成21年度スピニクス特別研究会　2009/10/22

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山形大学工学部、(09-5-9)
Ｑバンド強磁性共鳴を用いたc面配向CoPtCr合金膜の異方性磁界およびg因子の同時評価

日向慎太朗, 斉藤伸, 高橋研

平成21年度スピニクス特別研究会　2009/10/22

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山形大学工学部、(09-5-10)
表面プラズモン励起によるCoFeB軟磁性膜の縦カー効果の増強

斉藤伸, 鈴木理明, 杜関祥, 守哲司, 福田浩章, 高橋研

第33回日本磁気学会学術講演会　2009/09/14

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長崎大学文教キャンパス、14aE-3
Fabrication and optic properties of nano structure array

G. X. Du, T. Mori, M. Suzuki, S. Saito, H. Fukuda, M. Takahashi

第33回日本磁気学会学術講演会　2009/09/14

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長崎大学文教キャンパス、14aE-4
局在プラズモン励起ナノドット磁性体の光学・磁気光学特性

守哲司, 杜関祥, 鈴木理明, 斉藤伸, 福田浩章, 高橋研

第33回日本磁気学会学術講演会　2009/09/14

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長崎大学文教キャンパス、14aE-5
mmオーダーの磁区観察可能な広視野縦Kerr効果磁区観察装置の開発

目黒栄, 斉藤伸, 小林昌博, 赤羽浩一, 高橋研

第33回日本磁気学会学術講演会　2009/09/14

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長崎大学文教キャンパス、14pF-3
Ｑバンドを用いたc面配向Co-Pt-Cr合金膜の強磁性共鳴

日向慎太朗, 斉藤伸, 高橋研

第33回日本磁気学会学術講演会　2009/09/12

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長崎大学文教キャンパス、12aB-5
c面配向Co-Pt-Cr擬似六方晶合金薄膜の積層欠陥の定量評価

斉藤伸, 井上健, 日向慎太朗, 鈴木雄, 高橋研

第33回日本磁気学会学術講演会　2009/09/12

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長崎大学文教キャンパス、12aB-6
CoSi溶解ターゲットのリアクティブスパッタによるCo-SiO₂グラニュラー膜の作製プロセスの低ガス圧化

佐々木晋五, 斉藤伸, 高橋研

第33回日本磁気学会学術講演会　2009/09/12

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長崎大学文教キャンパス、12aB-7
c面配向Co_100-xGe_x薄膜の擬似六方晶構造と一軸結晶磁気異方性

日向慎太朗, 柳沢龍一, 斉藤伸, 高橋研

第33回日本磁気学会学術講演会　2009/09/12

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長崎大学文教キャンパス、12pC-1
積層欠陥導入による擬似六方晶形成のための材料条件; 臨界価電子数「９」

斉藤伸, 井上健, 柳沢龍一, 高橋研

第33回日本磁気学会学術講演会　2009/09/12

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長崎大学文教キャンパス、12pC-2
垂直磁気記録媒体のための層状不整擬似六方晶材料の開発

斉藤伸, 高橋研

日本磁気学会光機能性磁気デバイス・磁性材料専門研究会, 電気学会熱と磁気によるナノ領域スピン制御ストレージ技術調査専門委員会共催　2009/07/03

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日本大学理工学部駿河台校舎
c面配向擬似六方晶Co_100-xGe_x薄膜の一軸結晶磁気異方性

日向慎太朗, 斉藤伸, 柳沢龍一, 高橋研

電子情報通信学会磁気記録・情報ストレージ研究会　2009/06/11
高機能・高性能新規デバイスのためのスピンナノ構造体の創製

高橋研, 角田匡清, 斉藤伸, 小川智之

日本学術振興会第144委員会　2009/05/28
今、改めて問われる成膜プロセスの質 ―高機能磁気記録デバイスのナノ構造制御を一例として－

高橋研, 斉藤伸, 角田匡清

日本真空協会第231回産業部会　2009/01/22
Extreme Nano-structure Control by Sputtering for the High Density Perpendicular Recording Media and Head International-presentation

Migaku Takahashi, Masakiyo Tsunoda, Shin Saito

Asian Magnetics Conference 2008　2008/12/10
Uniaxial magnetocrystalline anisotropy for c-plane oriented Co_100-xM_x (M: Cr, Mo, W) film with stacking faults International-presentation

Shintaro Hinata, Ryuichi Yanagisawa, Shin Saito, Migaku Takahashi

53rd Annual Conference on Magnetism and Magnetic Materials　2008/11/13
Small and highly oriented Ru grains in intermediate layer realized by suppression of relaxation of low-angle grain boundaries for perpendicular recording media International-presentation

Norikazu Itagaki, Shin Saito, Migaku Takahashi

53rd Annual Conference on Magnetism and Magnetic Materials　2008/11/13
Extreme Nano-structure Control by Sputtering for the High Density Perpendicular Recording Media and Head International-presentation

Migaku Takahashi, Masakiyo Tsunoda, Shin Saito

The 5th Asia Forum on Magnetics　2008/10/17
Extreme Nano-structure Control by Sputtering for the High Density Perpendicular Recording Media and Head International-presentation

Migaku Takahashi, Masakiyo Tsunoda, Shin Saito

214th Electrochemical Society Fall Meeting　2008/10/13
Ni-Wシード層上におけるRu中間層の金属組織

上野友典, 藤本光晴, 斉藤伸, 石橋信一, 板垣憲和, 高橋研

第32回日本磁気学会学術講演会　2008/09/14
ストロボ法による高時間分解縦Kerr効果顕微鏡像のノイズ評価

目黒栄, 斉藤伸, 小林昌博, 赤羽浩一, 高橋研

第32回日本磁気学会学術講演会　2008/09/14
Co-Si-O素材組換ターゲットにより作製されるグラニュラー薄膜の成膜条件と構造および磁気特性

佐々木晋五, 斉藤伸, 高橋研

第32回日本磁気学会学術講演会　2008/09/12
大粒径シード層を用いた高配向かつ微細粒径のRu中間層の実現

板垣憲和, 斉藤伸, 高橋研

第32回日本磁気学会学術講演会　2008/09/12
X線回折法による層状不整擬似六方晶材料の積層欠陥の定量評価

斉藤伸, 柳沢龍一, 長谷川大二, 高橋研

第32回日本磁気学会学術講演会　2008/09/12
c面配向擬似六方晶Co_100-xM_x(M: Cr, Mo, W)薄膜の一軸結晶磁気異方性

日向慎太朗, 柳沢龍一, 斉藤伸, 高橋研

第32回日本磁気学会学術講演会　2008/09/12
Crystal structure as an origin of high anisotropy field of FeCoB films with Ru underlayer International-presentation

A. Hashimoto, K. Hirata, T. Matsuu, S. Saito, S. Nakagawa

International Magnetics Conference (INTERMAG2008)　2008/05/08
Pseudo-hcp material and its evaluation for perpendicular recording media International-presentation

S. Saito, M. Takahashi

International Magnetics Conference (INTERMAG2008)　2008/05/06
Al-N; a hexagonal-nitride seed layer underlayered Ru in granular-type perpendicular media International-presentation

S. Ishibashi, S. Saito, A. Hashimoto, M. Takahashi

International Magnetics Conference (INTERMAG2008)　2008/05/06
グラニュラー型垂直磁気記録媒体における金属／酸化物複合界面の制御

斉藤伸, 高橋研

日本真空協会平成19年度 12月仙台研究例会　2007/12/13
New media design concept by applying a direct/ indirect exchange coupling with a negative K_u^grain material International-presentation

S. Saito, D. Kim, Migaku Takahashi

52th Annual Conference on Magnetism and Magnetic Materials　2007/11/06
Advanced Granular-Type Perpendicular Recording Media --New materials and new stacked layer form-- International-presentation

Migaku Takahashi, Shin Saito

The 8th Perpendicular Magnetic Recording Conference　2007/10/16
Angular dependent remanent magnetization curve for perpendicular magnetic recording media determined by precise polar-Kerr detection system International-presentation

Daiji Hasegawa, Shin Saito, Norikazu Itagaki, Sakae Meguro, Yasushi Konishi, Eiji Yanagisawa, Koichi Akahane, Migaku Takahashi

The 8th Perpendicular Magnetic Recording Conference　2007/10/15
Al-N, Ta-N; a hexagonal-nitride seed layer underlayered Ru in granular-type perpendicular media International-presentation

Shinichi Ishibashi, Atsushi Hashimoto, Shin Saito, Migaku Takahashi

The 8th Perpendicular Magnetic Recording Conference　2007/10/15
Quantitative evaluation of surface roughness of RuCr intermediate layer for magnetic isolation of granular-type perpendicular media International-presentation

Shinji Yonemura, Shin Saito, Atsushi Hashimoto, Migaku Takahashi

The 8th Perpendicular Magnetic Recording Conference　2007/10/15
Degree of chemical reaction of carbon and oxygen to ferromagnetic grains for Co-based alloy-oxide granular structure International-presentation

Shingo Sasaki, Shin Saito, Migaku Takahashi

The 8th Perpendicular Magnetic Recording Conference　2007/10/15
RKKY的層間結合導入によるCoPtCr-SiO₂/Ru-SiO₂/CoIr-SiO₂積層媒体の反転磁界の変調効果

板垣憲和, 斉藤伸, 金東栄, 高橋研

第31回日本応用磁気学会学術講演会　2007/09/13
垂直磁気記録媒体のための層状不整擬似六方晶材料の構造評価

斉藤伸, 橋本篤志, 高橋研

第31回日本応用磁気学会学術講演会　2007/09/13
Co-SiO₂グラニュラ膜の飽和磁化の低下要因

佐々木晋吾, 斉藤伸, 高橋研

第31回日本応用磁気学会学術講演会　2007/09/13
窒化物六方晶シード層AlNを用いたグラニュラ型垂直媒体の粒径微細化およびc軸高配向化

石橋信一, 斉藤伸, 橋本篤志, 高橋研

第31回日本応用磁気学会学術講演会　2007/09/13
白色光を用いた縦Kerr効果顕微鏡による局所磁化方向の決定

目黒栄, 斉藤伸, 小林昌博, 赤羽浩一, 高橋研

第31回日本応用磁気学会学術講演会　2007/09/13
Tailor-Made Nano Structured Materials for Highly Qualified Spin Related Devices ― Exchange Coupling and Spin Dynamics ― International-presentation

M. Takahashi, M. Tsunoda, S.Saito, T. Ogawa

The 7th IEEE International Conference on Nanotechnology　2007/08/03
Kerr効果顕微鏡～μmオーダーの迅速な磁区構造観察と磁区内局所磁化方向の決定

斉藤伸, 目黒栄, 赤羽浩一, 高橋研

日本応用磁気学会第155回研究会　2007/07/20
Negative-K_u^grain Material for SUL and Exchange Coupled Media Application International-presentation

Shin Saito, Dong-Young Kim, Migaku Takahashi

The 1st ISAMMA Conference　2007/05/30
超高密度垂直磁気記録媒体実現に向けてのスピンナノテクノロジー開発

斉藤伸, 高橋研

日本学術振興会第144委員会　2007/01/26
Guideline for Selecting Materials of Nonmagnetic Intermediate Layer for Granular-type Perpendicular Recording Media International-presentation

Shin Saito, Atsushi Hashimoto, Norikazu Itagaki, Migaku Takahashi

10th Joint MMM/Intermag Conference　2007/01/10
The effect of intrinsic magnetic properties of negative-K_u material for p-/n-K_u stacked ECC media International-presentation

Norikazu Itagaki, Shin Saito, Atsushi Hashimoto, Migaku Takahashi

10th Joint MMM/Intermag Conference　2007/01/10
Duplex top recording layered structure for Longitudinal Magnetic Recording Media with double recording layer system (Compatibility of low media noise and high resolution) International-presentation

T. Q. Li, H. Ohyama, D. Hasegawa, S. Saito, M. Imakawa, M. Takahashi

10th Joint MMM/Intermag Conference　2007/01/10
Duplex bottom recording layered structure for Longitudinal Magnetic Recording Media with double recording layer system (Exchange-decoupling and high controllability of media properties) International-presentation

H. Ohyama, T. Q. Li, D. Hasegawa, S. Saito, M. Imakawa, M. Takahashi

10th Joint MMM/Intermag Conference　2007/01/10
NiAs型Mn₅₀(Te_50-xSb_x)スパッタリング薄膜の構造と磁性

芦沢好人, 斉藤伸, 角田匡清, 高橋研

第30回日本応用磁気学会学術講演会　2006/09/14
FeCoB/Ru/FeCoB積層スパッタ膜における巨大反平行結合の導出

橋本篤志, 斉藤伸, 大森一美, 高島洋, 上野友典, 高橋研

第30回日本応用磁気学会学術講演会　2006/09/13
positive-/negative-K_u^grain積層ECC媒体の提案

板垣憲和, 斉藤伸, 橋本篤志, 高橋研

第30回日本応用磁気学会学術講演会　2006/09/13
fcc構造を有する非磁性中間層への層状不整格子の導入によるグラニュラ型垂直媒体の磁気特性の向上 (1)

斉藤伸, 橋本篤志, 板垣憲和, 高橋研

第30回日本応用磁気学会学術講演会　2006/09/13
fcc構造を有する非磁性中間層への層状不整格子の導入によるグラニュラ型垂直媒体の磁気特性の向上 (2)

斉藤伸, 橋本篤志, 板垣憲和, 高橋研

第30回日本応用磁気学会学術講演会　2006/09/13
グラニュラ型垂直磁気記録媒体の成膜条件と成長機構

佐々木晋五, 橋本篤志, 板垣憲和, 斉藤伸, 高橋研

第30回日本応用磁気学会学術講演会　2006/09/13
磁化方向検出可能な縦Kerr効果レーザ顕微鏡の作製

斉藤伸, 目黒栄, 青戸孝至, 吉滝慎一郎, 小林昌博, 赤羽浩一, 高橋研

第30回日本応用磁気学会学術講演会　2006/09/11
縦Kerr効果顕微鏡の性能評価方法および観察条件の最適化法

目黒栄, 斉藤伸, 赤羽浩一, 高橋研

第30回日本応用磁気学会学術講演会　2006/09/11
Development of High Resolution and High Contrast Kerr Microscope for Observation of Longitudinal and Perpendicular µm-scale Magnetic Domain Structure International-presentation

K. Akahane, E. Yanagisawa, S. Meguro, S. Saito, M. Takahashi

The 16th International Microscopy Congress　2006/09/07
Magnetization reversal of positive/negative-K_u^grain stacked perpendicular media International-presentation

N. Itagaki, S. Saito, M. Takahashi

9th International Colloquium on Magnetic Films and Surfaces (ICMFS 2006)　2006/08/17
垂直磁気記録媒体用物理的/化学的分離テンプレート中間層の作製

斉藤伸, 橋本篤志, 平井健一, 高橋研

電子情報通信学会磁気記録・情報ストレージ研究会、映像情報メディア学会マルチメディアストレージ研究会, IEEE Mag. Soc. Japan Chapter共催研究会　2006/07/06
New concept of material design for CoPtCr-SiO₂ based ECC media ― Application of hcp disordered Co-Ir alloy with negative K_u^grain to the soft-mag part ― International-presentation

S. Saito, N. Itagaki, A. Hashimoto, M. Takahashi

International Magnetics Conference (INTERMAG2006)　2006/05/11
Enhancement of interlayer exchange coupling for antiparallel coupled soft magnetic underlayers using FeCoB amorphous material International-presentation

A. Hashimoto, S. Saito, M. Takahashi

International Magnetics Conference (INTERMAG2006)　2006/05/10
Structure and magnetism of c-plane-oriented Mn₅₀(Te_50-xSb_x) pseudo-single crystal films International-presentation

Y. Ashizawa, S. Saito, M. Tsunoda, M. Takahashi

International Magnetics Conference (INTERMAG2006)　2006/05/10
Investigation of diffusion elements for intergranular decoupling of post-annealed CoCrPt perpendicular media International-presentation

Norikazu Itagaki, Shin Saito, Migaku Takahashi

International Symposium on Creation of Magnetic Recording Materials with Nano-Interfacial Technologies　2005/12/08
垂直磁気記録媒体用物理的/化学的分離テンプレート中間層の作製

斉藤伸, 志摩智之, 板垣憲和, 高橋研

平成17年度スピニクス特別研究会　2005/11/18
Novel proposal of SUL utilizing soft magnetic material with negative uniaxial magnetocrystalline anisotropy ― For suppression of both WATE and spike noise ― International-presentation

A. Hashimoto, S. Saito, Migaku Takahashi

50th Annual Conference on Magnetism and Magnetic Materials　2005/11/03
負の一軸結晶磁気異方性をもつ軟磁性材料を用いた裏打ち膜の提案 ― WATEおよびスパイクノイズの同時抑制のために ―

橋本篤志, 斉藤伸, 高橋研

第29回日本応用磁気学会学術講演会　2005/09/22
無電界めっき法による量産対応型軟磁性裏打ち膜付き基板の開発

迎展彰, 橋本篤志, 斉藤伸, 高橋研

第29回日本応用磁気学会学術講演会　2005/09/22
自己組織化マスクを用いてミリングした多層膜媒体の磁気特性

斉藤伸, 橋本篤志, 高橋研

第29回日本応用磁気学会学術講演会　2005/09/22
ウルツ鉱型MnTeスパッタリング薄膜の構造と磁性

芦沢好人, 斉藤伸, 角田匡清, 篠田弘造, 田路和幸, 高橋研

第29回日本応用磁気学会学術講演会　2005/09/22
縦Kerr効果顕微鏡による磁区履歴画像からの局所磁化過程の検出

目黒栄, 赤羽浩一, 斉藤伸, 高橋研

第29回日本応用磁気学会学術講演会　2005/09/22
c面配向[MnSb/α-MnTe]エピタキシャル人工格子の作製と磁気特性

芦沢好人, 斉藤伸, 角田匡清, 高橋研

第29回日本応用磁気学会学術講演会　2005/09/21
Effect of bottom recording layer on medium structure and magnetic properties International-presentation

M. Imakawa, D. Hasegawa, S. Saito, T. Q. Li, H. Ohyama, M. Takahashi

6th International Symposium on Physics of Magnetic Materials (ISPMM 2005)　2005/09/16
Recent Nano Structured Magnetics for Ultra High Density Recording Media ― Material, process and physics ― International-presentation

Migaku Takahashi, Shin Saito, Tomoyuki Ogawa

International Symposium on Spintronics and Advanced Magnetic Technologies and International Symposium on Magnetic Materials and Applications 2005 (ISAMT/SOMMA 2005)　2005/08/25
テラビット磁気記録対応パターンド媒体の開発

小川智之, 斉藤伸, 高橋研

日本学術振興会第144委員会　2005/07/19
Material development of non-ferromagnetic element by diffusion analyses for CoCrPt post annealed perpendicular media International-presentation

Norikazu Itagaki, Shin Saito, Migaku Takahashi

International Magnetics Conference (INTERMAG ASIA 2005)　2005/04/08
Role of bottom layer in double recording layer for antiferromagnetically coupled media International-presentation

T. Q. Li, D. Hasegawa, S. Saito, H. Ohyama, M. Imakawa, Migaku Takahashi

International Magnetics Conference (INTERMAG ASIA 2005)　2005/04/08
Noble development of Al/NiP substrate with soft magnetic underlayer ― Formation of nano-crystalline and (111) orientation of plated NiFe film ― International-presentation

A. Hashimoto, S. Saito, M.Takahashi, N. Mukai

International Magnetics Conference (INTERMAG ASIA 2005)　2005/04/07
光学的手法による磁区像の観察～高コントラスト磁区観察顕微鏡の開発

赤羽浩一, 目黒栄, 斉藤伸, 仲真美子, 高橋研

電気学会第11回磁気利用センシングシステム調査専門委員会　2005/01/28
高明暗比縦Kerr効果顕微鏡の開発～μm磁区の観察のために

目黒栄, 赤羽浩一, 斉藤伸, 仲真美子, 高橋研

スピンエレクトロニクスにおけるナノ加工と計測ワークショップ ―ナノスピントロニクス機能とプロセス技術のデザイン・実証に向けて―　2005/01/13
垂直磁気記録媒体実現のためのプロセス設計とナノ構造制御

斉藤伸, 高橋研

電子情報通信学会磁気記録研究会　2004/11/14
Antiferromagnetic exchange coupling and magnetic properties for Co/(Pd, Pt) multilayered perpendicular media International-presentation

Shin Saito, Shinya Fujio, Hiroki Domon, Migaku Takahashi

49th Annual Conference on Magnetism and Magnetic Materials　2004/11/08
サブμm孤立パターンの磁化過程検出を可能とする縦Kerr効果磁気履歴曲線検出装置の開発

赤羽浩一, 小西泰司, 柳沢栄二, 斉藤伸, 高橋研

第28回日本応用磁気学会学術講演会　2004/09/24
μm磁区観察を可能とする高明暗比縦Kerr効果顕微鏡の開発

目黒栄, 赤羽浩一, 斉藤伸, 仲真美子, 高橋研

第28回日本応用磁気学会学術講演会　2004/09/24
ポストアニールを用いた非磁性元素拡散によるCoCrPtエピタキシャル垂直磁気記録媒体の粒間相互作用の低減

板垣憲和, 斉藤伸, 高橋研

第28回日本応用磁気学会学術講演会　2004/09/22
反強磁性/軟磁性積層裏打ち膜における磁化過程の軟磁性膜厚依存性

橋本篤志, 斉藤伸, 高橋研

第28回日本応用磁気学会学術講演会　2004/09/21
めっき裏打ち膜付Al/NiP基板の開発 -強磁性層/反強磁性層の作製工程の低減-

橋本篤志, 斉藤伸, 高橋研, 迎展彰

第28回日本応用磁気学会学術講演会　2004/09/21
反強磁性的交換結合を有するCo/Pd系多層垂直磁化膜の磁気特性

斉藤伸, 藤尾真也, 土門宏紀, 高橋研

第28回日本応用磁気学会学術講演会　2004/09/21
Dependence of magnetization reversal on thickness of soft magnetic layer in antiferromagnetic/ferromagnetic bilayer film. International-presentation

Atsushi Hashimoto, Shin Saito, Migaku Takahashi

The 7th Perpendicular Magnetic Recording Conference (PMRC2004)　2004/05/31
Induced unidirectional anisotropy in electroless-plated soft magnetic underlayer of Al substrate by coating the extremely thin antiferromagnetic layer by sputtering and its effect on single-domain formation. International-presentation

Atsushi Hashimoto, Shin Saito, Migaku Takahashi, Noriaki Mukai

The 7th Perpendicular Magnetic Recording Conference (PMRC2004)　2004/05/31
Remarkable improvement of Perpendicular Magnetic Properties by post annealing for M’/CoCrPt/M stacked media (M, M’ = Ti, Ta, Ru, Pt, CoCr, CrMn, MnSi) –New role of traditional element Ti- International-presentation

S. Saito, N. Itagaki, M. Takahashi

9th joint MMM/INTERMAG Conference (INTERMAG 2004)　2004/01/06
垂直磁気記録媒体実現のためのプロセス設計とナノ構造制御

斉藤伸

電気学会第18回ナノスケール磁性構造体調査専門委員会　2003/12/18
Post annealing effect on perpendicular magnetic properties for CoCrPt media International-presentation

Shin Saito, Norikazu Itagaki, Migaku Takahashi

International Symposium on Magnetic Materials and Applications and Winter Conference of the Korean Magnetics Society (SOMMA2003)　2003/12/04
RKKY的層間結合を有する積層裏打ち膜の交換結合磁界の増大

斉藤伸, 橋本篤志, 高橋研

電子情報通信学会磁気記録研究会　2003/11/14
Mn-Si-Cスパッタリング薄膜の構造および強磁性

芦沢好人, 鈴木祐司, 斉藤伸, 高橋研

平成15年度スピニクス特別研究会　2003/11/13
L1₀型FePtナノ粒子の直接合成と単磁区化めっき裏打ち層付NiP/Al基板の開発

斉藤伸, 高橋研

日本学術振興会第144委員会　2003/09/25
Ti/CoCrPt/Ti垂直記録媒体におよぼすin situ Annealの効果

斉藤伸, 板垣憲和, 高橋研

第27回日本応用磁気学会学術講演会　2003/09/19
Ti下地、Tiキャップ層を用いたCoCrPt系in situ Anneal媒体の磁気特性の向上

斉藤伸, 板垣憲和, 高橋研

第27回日本応用磁気学会学術講演会　2003/09/19
Mn-Si-Cスパッタリング薄膜の構造および磁気特性

芦沢好人, 鈴木祐司, 斉藤伸, 高橋研

第27回日本応用磁気学会学術講演会　2003/09/19
RKKY的層間結合を有する積層裏打ち膜の交換結合磁界の増大

斉藤伸, 橋本篤志, 高橋研

第27回日本応用磁気学会学術講演会　2003/09/18
新規めっき裏打ち層付NiP/Al基板の作製 -磁気特性並びに単磁区化-

斉藤伸, 橋本篤志, 高橋研, 迎展彰

日本学術振興会第144委員会　2003/09/18
高飽和磁化かつ低SULノイズ特性導出のための窒素添加Fe-Si-Al-N微結晶軟磁性材料の検討

斉藤伸, 橋本篤志, 平井健一, 高橋研

電子情報通信学会磁気記録研究会　2003/06/12
Improvement of magnetocrystalline anisotropy of columnar structure by epitaxial growth for CoCrPt-based perpendicular media International-presentation

S.Saito, N. Itagaki, F.Hoshi, M.Takahashi

47th Annual Conference on Magnetism and Magnetic Materials　2002/11/14
Guiding principle to realize CoCr-based perpendicular magnetic recording media with high squareness and normalized coercivity International-presentation

S.Saito, F.Hoshi, M.Takahashi

47th Annual Conference on Magnetism and Magnetic Materials　2002/11/12
磁気的層間結合を利用した裏打ち膜の高浮遊磁界耐性化

斉藤伸, 平井健一, 橋本篤志, 高橋研

第26回日本応用磁気学会学術講演会　2002/09/17
FeTaN/CoCrPtB垂直二層膜媒体用中間層の構造制御と薄膜化

斉藤伸, 橋本篤志, 平井健一, 高橋研

第26回日本応用磁気学会学術講演会　2002/09/17
CoCr/C中間層の導入によるCoCrPt系垂直薄膜媒体の高Ku化

斉藤伸, 板垣憲和, 星文和, 高橋研

第26回日本応用磁気学会学術講演会　2002/09/17
CoCrPtB垂直薄膜媒体の磁気特性の温度変化

斉藤伸, 板垣憲和, 星文和, 高橋研

第26回日本応用磁気学会学術講演会　2002/09/17
高角型比・高規格化保磁力CoCr基垂直磁気記録媒体の材料設計

斉藤伸, 星文和, 板垣憲和, 高橋研

第26回日本応用磁気学会学術講演会　2002/09/17
CoCrPtBエピタキシャル垂直薄膜媒体用の中間層材料の検討

斉藤伸, 板垣憲和, 星文和, 高橋研

平成14年度スピニクス特別研究会　2002/07/25
低ノイズFeTaN裏打ち膜の軟磁気特性制御

斉藤伸, 平井健一, 橋本篤志, 高橋研

平成14年度スピニクス特別研究会　2002/07/25
極薄C層を用いたCoCrPtB/Co₆₀Cr₄₀垂直磁気記録媒体の微細構造解析

斉藤伸, 星文和, 高橋研

電子情報通信学会磁気記録研究会　2002/07/05
CoCrPt系垂直磁気記録媒体の薄膜成長制御による初期層の低減

斉藤伸, 高橋研

日本学術振興会第144委員会　2002/05/23
Thin film growth for traditional CoCr-based perpendicular recording media: ― Problems and new solution― International-presentation

S. Saito, M. Takahashi

ReCAMM-Takahashi Lab, Tohoku University Joint Symposium on Magnetic Memories　2002/05/17
Effects of Very Thin Carbon Layer on Formation of hcp Phase for CoCrPtB Perpendicular Media with Co₆₀Cr₄₀ Intermediate Layer International-presentation

S.Saito, F.Hoshi, M.Takahashi

International Magnetics Conference (INTERMAG 2002)　2002/05/02
ドライプロセス対応高Bsα'-Fe₁₆C₂の軟磁気特性の誘導と熱安定性

斉藤伸, 須永和晋, 高橋研

『原子界面設計による超高密度磁気記録デバイスの研究開発』合同公開シンポジウム　2002/01/29
CoCrPt系垂直磁気記録媒体の薄膜成長制御による初期層の低減

斉藤伸, 星文和, 高橋研

『原子界面設計による超高密度磁気記録デバイスの研究開発』合同公開シンポジウム　2002/01/29
強磁性-反強磁性積層膜の交換磁気異方性と裏打ち層の磁区制御

角田匡清, 平井健一, 斉藤伸, 高橋研

『原子界面設計による超高密度磁気記録デバイスの研究開発』合同公開シンポジウム　2002/01/29
Study on Magnetic Field Determined from Deminishing Rotational Hysteresis Loss for CoCr-Based Perpendicular Media International-presentation

S. Saito, Y. Sato, F. Hoshi, M. Takahashi

46th Annual Conference on Magnetism and Magnetic Materials　2001/11/16
Temperature Dependence of Perpendicular Magnetic Anisotropy for c-plane-Oriented MnSb Sputtered Films International-presentation

Y.Ashizawa, S.Saito, M.Takahashi

46th Annual Conference on Magnetism and Magnetic Materials　2001/11/15
Analysis of Mechanism of Growth for MnSb Epitaxial Films on Si Substrate Fabricated by DC Sputtering International-presentation

Y. Ashizawa, S. Saito, M. Takahashi

46th Annual Conference on Magnetism and Magnetic Materials　2001/11/15
Reduction of Thickness of Initial Growth Layer in CoCr-based Perpendicular Media Evaluated by Perpendicular Torquemetry International-presentation

S. Saito, F. Hoshi, Y. Sato, M. Takahashi

46th Annual Conference on Magnetism and Magnetic Materials　2001/11/15
Novel Materials and Sputtering Processes for High Density Data Storage International-presentation

M. Takahashi, D. D. Djayaprawira, S.Saito, M. Tsunoda

International Conference on Materials for Advanced Technologies 2001　2001/11/15
インラインプロセスにより制御した裏打ちFeTaN薄膜の軟磁気特性ならびにノイズ特性

斉藤伸, 平井健一, 高橋研

第25回日本応用磁気学会学術講演会　2001/09/26
c面配向MnSbスパッタ薄膜の垂直磁気異方性の温度特性

芦沢好人, 斉藤伸, 高橋研

第25回日本応用磁気学会学術講演会　2001/09/25
CoCr基垂直薄膜媒体の回転ヒステリシス損失消失磁界に関する考察

斉藤伸, 佐藤好浩, 星文和, 高橋研

第25回日本応用磁気学会学術講演会　2001/09/25
非磁性CoCr/極薄C中間層を用いたCoCrPtB垂直磁気記録媒体の磁気特性と微細構造

斉藤伸, 星文和, 高橋研

第25回日本応用磁気学会学術講演会　2001/09/25
種々の下地・磁性層材料を用いたCoCr基垂直薄膜媒体の初期層厚の定量解析

斉藤伸, 星文和, 高橋研

第25回日本応用磁気学会学術講演会　2001/09/25
Co基垂直薄膜媒体のコラム状晶内結晶磁気異方性 (垂直トルクの膜厚依存性の解析)

斉藤伸, 長谷川大二, D.D.ジャヤプラウィラ, 高橋研

平成12年度スピニクス特別研究会　2000/11/02
Co基垂直薄膜媒体のコラム状晶内結晶磁気異方性 (垂直トルクの膜厚依存性の解析)

斉藤伸, 長谷川大二, D.D.ジャヤプラウィラ, 高橋研

『原子界面設計による超高密度磁気記録デバイスの研究開発』合同公開シンポジウム　2000/10/31
Analysis of Magnetizing Process Depended on Film Depth by Optical Method for Perpendicular Thin Film Media International-presentation

S.Saito, Y.Hatta, F.Hoshi, M.Takahashi

The 5th Perpendicular Magnetic Recording Conference (PMRC2000)　2000/10/23
Co基垂直薄膜媒体のコラム状晶内結晶磁気異方性 (垂直トルクの膜厚依存性の解析)

斉藤伸, 長谷川大二, D.D.ジャヤプラウィラ, 高橋研

第24回日本応用磁気学会学術講演会　2000/09/13
光学的手法による垂直薄膜媒体磁化過程の膜厚方向解析

斉藤伸, 八田芳仁, 高橋研

第24回日本応用磁気学会学術講演会　2000/09/13
c面高配向MnSb薄膜作製プロセスの低温化

斉藤伸, 芦沢好人, 荘司弘樹, 高橋研

第24回日本応用磁気学会学術講演会　2000/09/12
Epitaxial Growth of MnSb Films Fabricated by Planar Sputtering; (Effect of Substrate Temperature and Bias on Epitaxial Growth) International-presentation

S.Saito, Y.Ashizawa, H.Shoji, M.Takahashi

16th International Colloquium of Magnetic Films and Surfaces (ICMFS 2000)　2000/04/14
“Epitaxial Growth of MnSb Films Fabricated by Planar Sputtering. (Effect of Substrate Bias for Epitaxial Growth) International-presentation

S.Saito, Y.Ashizawa, H.Shoji, M.Takahashi, T.Miyazaki

The 5th Symposium on the Physics and Application of Spin-Related Phenomena in Semiconductors　1999/12/17
MnSbスパッタ薄膜の成長過程に及ぼす基板バイアス効果

斉藤伸, 芦沢好人, 荘司弘樹, 高橋研, 宮崎照宣

第23回日本応用磁気学会学術講演会　1999/10/07
プレーナ配置式スパッタリング法によるMnSbエピタキシャル薄膜の作製 (種々のSi基板上に作製したMnSb薄膜の配向制御)

荘司弘樹, 芦沢好人, 斉藤伸, 高橋研, 宮崎照宣

第23回日本応用磁気学会学術講演会　1999/10/07
Epitaxial Growth of MnSb Sputtered Film. (Influence of Charged Particle for Epitaxial Growth) International-presentation

H.Oguma, H.Kudo, S.Saito, H.Shoji, M.Takahashi

The 4th Symposium on the Physics and Application of Spin-Related Phenomena in Semiconductors　1998/12/04
MnSbPt薄膜の微細構造と磁気光学効果 (PtMnSb相の析出・再結晶と磁気光学構造の波長シフト)

斉藤伸, 荘司弘樹, 高橋研

電気学会マグネティックス研究会　1998/12/01
スパッタリング法によるMnSbエピタキシャル薄膜の作製

小熊博, 工藤大弥, 斉藤伸, 荘司弘樹, 高橋研

第22回日本応用磁気学会学術講演会　1998/09/23
MnSbPt薄膜の微細構造と磁気光学効果 (PtMnSb相の析出・再結晶と磁気光学構造の波長シフト)

斉藤伸, 荘司弘樹, 高橋研

第22回日本応用磁気学会学術講演会　1998/09/23
Dielectric Tensor and Magneto-Optical Effect for MnSbM (M=Au, Pd, Pt) Films Consist of MnSb and MMnSb Phases International-presentation

W.B.Shu, S.Saito, D.Hasegawa, H.Shoji, M.Takahashi

4th International Symposium on Physics of Magnetic Materials (ISPMM 98)　1998/08/24
Influence of Microstructure on Magneto-Optical Kerr Effect for MnSbPt Films (Effect of Precipitated and recrystallized PtMnSb Phase) International-presentation

S.Saito, M.Watanabe, H.Shoji, M.Takahashi

4th International Symposium on Physics of Magnetic Materials (ISPMM 98)　1998/08/24
Epitaxial Growth of MnSb Films on Si Substrates by Sputtering International-presentation

H.Oguma, S.Saito, H.Shoji, M.Takahashi

The 3th Symposium on the Physics and Application of Spin-Related Phenomena in Semiconductors　1997/11/17
スパッタリング法によるMnSbエピタキシャル膜の作製 (Si基板上に作製したMnSb薄膜の配向制御)

荘司弘樹, 小熊博, 斉藤伸, 高橋研

第21回日本応用磁気学会学術講演会　1997/10/04
MnSbM(M=Pt, Au, Pd)薄膜の構造および磁気光学特性

許文彬, 斉藤伸, 荘司弘樹, 高橋研

第21回日本応用磁気学会学術講演会　1997/10/04
MnSbPt薄膜の誘電率テンソルと磁気光学効果

斉藤伸, 渡辺誠, 荘司弘樹, 高橋研

第21回日本応用磁気学会学術講演会　1997/10/04
MnSbPt薄膜の微細構造と磁気光学効果

荘司弘樹, 渡辺誠, 斉藤伸, 高橋研

第21回日本応用磁気学会学術講演会　1997/10/04
Structure and MO Kerr Effect for MnSbM (M=Au, Pd, Pt) Films International-presentation

W.B.Shu, S.Saito, H.Shoji, M.Takahashi

Asia-Pacific Data Strage Conference (97’APDSC)　1997/07/17
Structure and Optical Properties of MnSbPt Films with Giant Magnetic Kerr Rotation International-presentation

S.Saito, M.Watanabe, H.Shoji, M.Takahashi

International Magnetics Conference (INTERMAG 97)　1997/04/03
MnSbPd薄膜の構造および磁気光学特性

許文彬, 白石一雄, 斉藤伸, 荘司弘樹, 脇山徳雄

第20回日本応用磁気学会学術講演会　1996/09/23
巨大磁気カー回転角を有するMnSbPt薄膜の微細構造

斉藤伸, 荘司弘樹, 高橋研

第20回日本応用磁気学会学術講演会　1996/09/23
MnSbPt薄膜の光学および磁気光学特性

荘司弘樹, 渡辺誠, 斉藤伸, 脇山徳雄

第20回日本応用磁気学会学術講演会　1996/09/23
NiAs型MnSbAu薄膜の磁気および磁気光学特性

許文彬, 荘司弘樹, 斉藤伸, 脇山徳雄

第19回日本応用磁気学会学術講演会　1995/09/23
NiAs型MnSbPt薄膜の微細構造と巨大磁気光学効果

荘司弘樹, 斉藤伸, 高橋研, 脇山徳雄

第19回日本応用磁気学会学術講演会　1995/09/23
Giant Magneto-Optical Transition for Pt Substituted MnSb Films with NiAs Structure International-presentation

M.Takahashi, H.Shoji, M.Tsunoda, S.Saito, T.Wakiyama, Y.Takeda, Y.Itakura

Magneto-Optical Recording International Symposium '94 (MORIS '94)　1994/09/27
NiAs型MnSbPt薄膜の磁気光学特性

荘司弘樹, 高橋研, 穂積靖, 斉藤伸, 脇山徳雄

第18回日本応用磁気学会学術講演会　1994/09/12

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Industrial Property Rights 33

磁気記録媒体および磁気記憶装置

日向慎太朗, 斉藤伸, 福島隆之, 大橋栄久, 丹羽和也, 張磊, 村上雄二, 柴田寿人, 山口健博, 神邊哲也, 茂智雄

Property Type: Patent
スパッタリングターゲット

齊藤伸, 岩谷幸作

Property Type: Patent
磁気記録媒体用スパッタリングターゲット

久保木孔之, 丸子智弘, 鈴木雄, 齊藤伸, 日向慎太朗, 高橋研

特許6366095

Property Type: Patent
スパッタリングターゲットおよびその製造方法

キムコング, 山本俊哉, 齊藤伸, 日向慎太朗, 高橋研

特許6416497

Property Type: Patent
磁性薄膜、その製造方法、磁性薄膜を用いた、高周波発振素子、磁気ヘッド、磁気記録媒体、及び磁気記録再生装置

竹尾昭彦, 喜々津哲, 前田知幸, 高橋研, 斉藤伸, 井上健, 黒川剛平

Property Type: Patent
磁気記録媒体、磁気記録媒体の製造方法および磁気記録再生装置

柴田寿人, 井上健, 岡田翼, 黒川剛平, 斉藤伸, 日向慎太朗, 高橋研, 前田知幸, 礒脇洋介, 喜々津哲

特許6120261

Property Type: Patent
磁気記録媒体及び磁気記録再生装置

斉藤伸, 高橋研, 黒川剛平, 井上健, 喜々津哲, 前田知幸, 礒脇洋介

特許6124245

Property Type: Patent
磁気特性測定装置、磁気特性測定方法及び磁界測定方法

目黒栄, 齊藤伸, 高橋研

Property Type: Patent
磁気光学効果測定装置及び磁気光学効果測定方法

目黒栄, 齊藤伸, 杜関祥, 高橋研

Property Type: Patent
磁気記録媒体の製造方法、磁気記録媒体及び磁気記録再生装置

斉藤伸, 高橋研, 橋本篤志, 佐々木有三, 黒川剛平, 前田知幸, 竹尾昭彦

Property Type: Patent
磁気センサ、光スイッチ

守哲司, 福田浩章, 斉藤伸, 高橋研

Property Type: Patent
空間光変調器、光スイッチ、画像表示装置

守哲司, 高橋研, 斉藤伸

特許5507894

Property Type: Patent
磁気記録媒体の製造方法及び磁気記録媒体、並びに磁気記録再生装置

佐々木晋五, 斉藤伸, 高橋研, 橋本篤志, 佐々木有三, 黒川剛平, 前田知幸, 竹尾昭彦

特許5250838

Property Type: Patent
スパッタリングターゲット

古山晃一, 岡部文絵, 石橋信一, 斉藤伸, 高橋研

Property Type: Patent
磁気記録媒体、その製造方法および磁気記録再生装置

石橋信一, 斉藤伸, 高橋研, 佐々木有三, 橋本篤志, 黒川剛平, 前田知幸, 竹尾昭彦

特許5105333

Property Type: Patent
磁気記録媒体、その製造方法および磁気記録再生装置

石橋信一, 斉藤伸, 高橋研, 佐々木有三, 橋本篤志, 黒川剛平, 前田知幸, 竹尾昭彦

特許5105332

Property Type: Patent
磁気記録媒体、その製造方法および磁気記録再生装置

高橋研, 斉藤伸, 黒川剛平, 佐々木有三, 小松田辰, 橋本篤志, 竹尾昭彦, 前田知幸

特許5397926

Property Type: Patent
磁気記録媒体、その製造方法および磁気記録再生装置

高橋研, 斉藤伸, 前田知幸, 竹尾昭彦, 佐々木有三, 坂口竜二

特許5019955

Property Type: Patent
負異方性交換結合型磁気記録媒体及び磁気記録再生装置

高橋研, 斉藤伸, 前田知幸, 竹尾昭彦, 佐々木有三, 坂口竜二

Property Type: Patent
カー効果顕微鏡、磁化方向測定方法、及びカー効果顕微鏡校正方法

目黒栄, 赤羽浩一, 斉藤伸, 高橋研

特許5250879

Property Type: Patent
長手磁気記録媒体

大山浩永, 李図強, 長谷川大二, 斉藤伸, 高橋研

Property Type: Patent
情報記録装置とその情報記録再生方法

高橋研, 角田匡清, 斉藤伸, 小川智之, 藤村格, 三澤成嘉, 川崎俊之

特許4447570

Property Type: Patent
フェードインメモリと情報記録方法および情報再生方法

川崎俊之, 三澤成嘉, 藤村格, 高橋研, 角田匡清, 斉藤伸, 小川智之

特許4840975

Property Type: Patent
垂直磁気記録媒体とその製造方法および装置、並びに磁気記録装置

高橋研, 斉藤伸

Property Type: Patent

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2004 年 7 月 8 日出願、特願2004-201970 (優先権主張番号) 2005 年 7 月 8 日出願、特願2005-199549
垂直磁気記録媒体および垂直磁気記録装置

高橋研, 斉藤伸, 迎展彰

Property Type: Patent
磁気記録媒体とその製造方法

斉藤伸, 高橋研, 小宮山和弥

Property Type: Patent
垂直磁気記録媒体とそれを備えた磁気記録装置及び垂直磁気記録媒体の製造方法並びに製造装置

斉藤伸, ダビッドジャヤプラウィラ, 高橋研

Property Type: Patent
垂直磁気記録媒体、その製造方法及び製造装置、並びに磁気記録装置

斉藤伸, ダビッドジャヤプラウィラ, 高橋研

Property Type: Patent
垂直磁気記録媒体及びその製造方法並びに磁気記録装置

斉藤伸, ダビッドジャヤプラウィラ, 高橋研

Property Type: Patent

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2001 年 3 月 2 日出願、特願2001-058974 (優先権主張番号) 2002 年 3 月 1 日出願、特願2002-056452
炭化鉄材料の製造方法、及び炭化鉄薄膜材料

前田徹, 齊藤伸, 小川智之, 飛世正博

特許6294534

Property Type: Patent
ホウ化鉄材料の製造方法、及び炭化鉄薄膜材料

前田徹, 齊藤伸, 小川智之, 飛世正博

特許6294533

Property Type: Patent
磁気記録媒体、その製造方法および磁気記録再生装置

高橋研, 斉藤伸, 前田知幸, 竹尾昭彦, 佐々木有三, 坂口竜二

特許5061307

Property Type: Patent

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2006年 5 月 8 日出願、特願2006-129335 (優先権主張番号) 2007 年 1 月 23 日出願、特願2007-013026 (優先権主張番号) 2007 年 5 月 7 日出願、特願2008-514489号
垂直磁気記録媒体及びその評価方法

斉藤伸, ダビッドジャヤプラウィラ, 高橋研

特許3647031

Property Type: Patent

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WO01/069595 2000 年 3 月 17 日出願、特願2000-076021 (優先権主張番号) 2001 年 3 月 16 日出願、特願2001-567587

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Research Projects 4

Magneto-plasmonic materials Competitive

System: Grant-in-Aid for Scientific Research

2008/04 - Present
Development of material and fabrication process for perpendicular magnetic recording media Competitive

2000/04 - Present
Properties for Mn-based composite material Competitive

System: Grant-in-Aid for Scientific Research

2000/04 - Present
Development of Kerr microscope for magnetic domain observation Competitive

System: Grant-in-Aid for Scientific Research

2000/04 - Present

Social Activities 1

模擬講義の講師 (水戸第一高等学校)

2009/10/23 -

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茨城県立水戸第一高等学校第2学年の模擬授業の講師を担当。高等学校側の企画目的は、滝の通り。「２学年の生徒を対象に、大学で行われる講義を体験させることによって、学問に対する興味・関心を深めると同時に、進路決定のための具体的材料とする。」 324名中24名が受講。

Other 11

ホットカソード法による切削加工用酸化物・窒化物皮膜の高速スパッタ成膜技術の開発

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酸化物・窒化物薄膜の形成は、半導体メモリ・磁気記録デバイス等の先端電子デバイスから、光学素子の反射防止膜・波長フィルタ、切削工具用の超硬皮膜など、汎用製品を実現する上で必須な基盤技術である。古くは湿式メッキ法が活用され形成されることが多かったが、最近では皮膜の薄膜化・高機能化に伴い乾式 (真空) プロセスによる形成が主流となり、飛来粒子を基体に直接堆積させるPVD法、特にその中でも緻密・高強度・高密着性の点で優れているスパッタリング法が産業応用上では極めて重要である。しかしながら一般に酸化物・窒化物薄膜のスパッタ成膜では、組成制御と高速成膜とを両立することが困難であり、量産性を律速していた (一般に酸化物の成膜速度は金属の1/10以下)。そこで本研究では、組成制御が比較的容易なRFスパッタリング法を選択し、切削工具用の皮膜として必要とされるAl, Ti, Cr系の酸化物・窒化物を高速で成膜する技術の確立を目的とする。
ナノクラスター組織からなる革新的磁性材料の創製

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本研究は、
ホットカソード法を用いた酸化物絶縁体薄膜の高速スパッタ成膜技術の実用化開発

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入力待ち
高飽和磁化Fe-Co-C-N系軟磁性粉の創製に関する検討

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本研究は、
気相-固相反応を利用した超高飽和磁化Fe-C-N軟磁性粉の創製

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入力待ち
貴金属を含む合金薄膜の稠密面原子積層による一軸性のイノベーションと磁気ストレージデバイスへの展開

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本研究の目的は，ハードディスク用垂直磁気記録媒体，スピントロニクスデバイスへの応用を念頭に，磁性デバイスに必須な一軸結晶対称性を具備する機能性材料を創製し，代替非磁性材料の選択の自由度を大幅に拡張し，また一軸磁気異方性が高い強磁性薄膜材料を見出すことにある．実現手法は，価電子数の制御により，稠密面原子積層合金薄膜中に膜面と平行にのみ積層欠陥を導入する，もしくは極力排除することにより，層状不整度を制御した擬似六方晶薄膜を開発することによる．結晶相とアモルファス粒界相からなるグラニュラ材料の創製を目指す．
マグネトプラズモニック構造体の磁化のダイナミクス

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超Tbit/inch²級超高密度磁気記録システムの実現には、ナノサイズの単磁区磁性結晶粒（スピンクラスター）を整然と並べた構造体を媒体とし、超高速化を図った読み出し／書き込み技術を実現しなければなりません。本研究では、光－原子スピン相互作用を利用した新原理に基づく書き込み技術の可能性を追求するため、局在プラズモンを励起したスピンクラスター中でのスピンダイナミクスを把握することを目指します。
c面配向Co-M(M: Pt, Pd, Ir, Rh)合金薄膜における六方晶系規則相の探索とその組織ならびに一軸結晶磁気異方性

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本研究の目的は，材料開発が行き詰まりつつあるハードディスク用垂直磁気記録媒体への応用を念頭に，高い一軸結晶磁気異方性を有する新規Co基六方晶強磁性規則相を探索することにある．組成探索の指針は本研究代表者の斬新なアイデアにより行う．すなわちCo基不規則合金薄膜において価電子則を破って六方晶原子層積層が安定化する組成に注目して，超清浄雰囲気スパッタ法により集中的にプロセス条件を詰め規則相を探索する．
電子部品・デバイスの実装評価に必須な局所領域・空間における漏れ磁界磁化の動的挙動を可視化する技術の開発

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平行光学系と集光光学系との両立技術、レーザ光のインコヒーレント化による平行光学系の確立、及び上記要素技術を組み合わせ、磁区観察と局所磁化過程検出とを実現する汎用型動的電磁環境・磁化過程を可視化すること。
垂直磁気記録媒体用代替材料「層状不整擬似六方晶」の提案

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本研究の目的は、垂直磁気記録媒体用の材料開発を念頭に、新規一軸性結晶材料「層状不整擬似六方晶」を提案し、一軸性結晶の代替材料選択の自由度を大幅に拡張することにある。
自己組織化ナノ構造テンプレートを用いた超高密度グラニュラ媒体の開発

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本研究では、1Tbit/inch²を超える超高密度ハードディスク媒体の要素技術として、量産性に好適なドライプロセスのみによる自己組織化ナノ構造テンプレート中間層の形成・薄膜化技術ならびに磁性結晶粒の反転磁界制御技術を確立することを目標とする。これらの技術の組合せにより非磁性中間層厚5nm以下、平均粒径7nm以下、粒径分散幅1nm以下、に組織制御され、かつ、熱安定性と記録容易性を兼ね備えるグラニュラ型垂直磁気記録媒体の実現の見通しが立つ。

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