TOHOKU UNIVERSITY Researchers - Tomoteru Fukumura

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Tomoteru Fukumura

Section

Graduate School of Science

Job title

Professor

Degree

博士（工学）（東京大学）
修士（工学）（東京大学）

researchmap

https://researchmap.jp/read0075749

J-GLOBAL ID

200901021668155443

ORCID

https://orcid.org/0000-0002-8957-3520

Researcher ID

C-2081-2009

Committee Memberships 2

日本化学会　速報誌編集委員

2013/01 - Present
日本化学会　速報誌編集委員

2013/01 - Present

Professional Memberships 2

日本化学会
応用物理学会

Research Interests 4

superconductivity
magnetism
spintronics
oxide electronics

Research Areas 5

Natural sciences / Magnetism, superconductivity, and strongly correlated systems /
Nanotechnology/Materials / Thin-film surfaces and interfaces /
Manufacturing technology (mechanical, electrical/electronic, chemical engineering) / Electronic devices and equipment /
Nanotechnology/Materials / Crystal engineering /
Nanotechnology/Materials / Applied materials /

Awards 9

第7回日本学術振興会賞

2011/03/03　日本学術振興会　磁性酸化物半導体の創成
Best Presentation Award

2009/09/25　International Center of Education and Research, Tohoku University　Transparent oxide spintronics
The Young Scientists' Prize, The Commendation for Science and Technology by the Minister of Education,Culture, Sports, Science and Technology

2009/04/14　文部科学省　磁性酸化物半導体の合成と物性およびデバイスの研究
第19回トーキン科学技術振興財団研究奨励賞

2009/03/17　財団法人トーキン科学技術振興財団　磁性酸化物半導体の開発とその応用に関する研究
2nd Thomson Scientific Research Front Award

2007/09/19　トムソンサイエンティフィック　酸化物磁性半導体のコンビナトリアル探索と室温強磁性の発見
The 10th Marubun Research and Encouragement Award

2007/03/05　丸文研究交流財団　高温強磁性酸化物半導体の創製とそのデバイス実証に関する研究
The Japanese Society of Appied Physics: 26th JJAP journal promotion award

2004/09/01　応用物理学会　Magneto-Optical Spectroscopy of Anatase TiO2 Doped with Co
44th Harada Research Promotion Award

2004/07/12　財団法人本多記念会　高いキュリー温度を持つ透明強磁性半導体の創成と強磁性スピン分極の実証
第10回先端技術学生論文佳作

1996/06　日本工業新聞社　走査型ホール素子顕微鏡の開発

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Papers 274

Rocksalt rare earth monoxides as electronic and magnetic materials

Tomoteru Fukumura, Satoshi Sasaki, Masamichi Negishi, Daichi Oka

Trends in Chemistry　2025/07

DOI： 10.1016/j.trechm.2025.04.011 　
Millimeter-Sized Single-Crystalline Anatase Nb-Doped TiO2 Membranes Exhibiting High Electrical Conduction and Transparency

Yuzuki Uchida, Jiyang Huang, Masamichi Negishi, Seung Sae Hong, Tomoteru Fukumura

ACS Applied Electronic Materials　2025/04/22

DOI： 10.1021/acsaelm.4c02342 　
Thin film epitaxy of high quality ferromagnetic semiconductor EuO using pulsed laser deposition equipped with Nd:YAG laser

Ramchandra Sahoo, Yusuke Sato, Satoshi Sasaki, Masamichi Negishi, Ryota Takahashi, Tomoteru Fukumura

Chemistry Letters　2025/02/05

DOI： 10.1093/chemle/upaf005 　
Thickness-induced metal–semiconductor transition in LaH2 epitaxial thin films grown by reactive rf magnetron sputtering

Sumireno Uramoto, Hideyuki Kawasoko, Satoru Miyazaki, Tomoteru Fukumura

RSC Applied Interfaces　2025

DOI： 10.1039/D4LF00367E 　
Selective heteroepitaxial synthesis of 2D bismuth-based mixed-anion compounds with interfacial spin–orbit interaction via atmospheric solution routes

Zhengkang Peng, Daichi Oka, Yasushi Hirose, Tomoteru Fukumura

Journal of Materials Chemistry C　2025
Publisher: Royal Society of Chemistry (RSC)
DOI： 10.1039/d4tc05433d 　

ISSN： 2050-7526

eISSN： 2050-7534

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Bi₂OS₂ and Bi₃O₂S₂Cl epitaxial thin films with strong spin–orbit interaction were selectively synthesized by mist chemical vapor deposition.
Rocksalt-type heavy rare earth monoxides TbO, DyO, and ErO exhibiting metallic electronic states and ferromagnetism

Satoshi Sasaki, Daichi Oka, Daisuke Shiga, Ryunosuke Takahashi, Suguru Nakata, Koichi Harata, Yuichi Yamasaki, Miho Kitamura, Hironori Nakao, Hiroki Wadati, Hiroshi Kumigashira, Tomoteru Fukumura

Dalton Transactions　2025
Publisher: Royal Society of Chemistry (RSC)
DOI： 10.1039/d4dt03214d 　

ISSN： 1477-9226

eISSN： 1477-9234

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Rocksalt-type heavy rare earth monoxides REOs (RE = Tb, Dy, Er) were synthesized as single phase epitaxial thin films for the first time. They exhibited metallic electronic states and a much higher T_C than the corresponding rare earth nitrides.
Photoreflectance spectroscopy of BiOCl epitaxial thin films

T. Nishiwaki, Z. Sun, D. Oka, T. Fukumura, T. Makino

Japanese Journal of Applied Physics　2024/02/29

DOI： 10.35848/1347-4065/ad0306 　
Semimetallic electrical properties of rock salt-type LaBi thin films grown by solid-phase reaction of La/Bi multilayer precursors

Kenshin Yoshikawa, Hideyuki Kawasoko, Tomoteru Fukumura

CrystEngComm　26　(22)　2940-2944　2024
Publisher: Royal Society of Chemistry (RSC)
DOI： 10.1039/d4ce00198b 　

eISSN： 1466-8033

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Highly crystalline LaBi thin films, grown by solid-phase reaction of La/Bi multilayer precursors, showed metallic conduction and nonlinear Hall resistance, indicating the semimetallic nature with electron and hole carriers.
Enhanced Curie temperature near 300 K in highly crystalline GdO epitaxial thin films concomitant with an anomalous Hall effect

Takato Fukasawa, Dai Kutsuzawa, Daichi Oka, Kenichi Kaminaga, Daichi Saito, Hirokazu Shimizu, Hiroshi Naganuma, Tomoteru Fukumura

Journal of Materials Chemistry C　2024
Publisher: Royal Society of Chemistry (RSC)
DOI： 10.1039/d4tc00738g 　

ISSN： 2050-7526

eISSN： 2050-7534

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The Curie temperature of a ferromagnetic semiconductor GdO was enhanced to 303 K due to the improved crystallinity and electron mobility.
Multilayer Solid-Phase Epitaxy of La₂O₂Bi Thin Films toward Higher Electrical Conduction in a Monatomic Bi Square Net Semimetal

Yuki Yamamoto, Hideyuki Kawasoko, Tomoteru Fukumura

ACS Applied Nano Materials　6　(22)　20673-20677　2023/11/06
Publisher: American Chemical Society (ACS)
DOI： 10.1021/acsanm.3c03344 　

ISSN： 2574-0970

eISSN： 2574-0970
Moiré‐Assisted Realization of Octahedral MoTe₂ Monolayer

Yasuaki Saruta, Katsuaki Sugawara, Hirofumi Oka, Tappei Kawakami, Takemi Kato, Kosuke Nakayama, Seigo Souma, Takashi Takahashi, Tomoteru Fukumura, Takafumi Sato

Advanced Science　2023/10/22
Publisher: Wiley
DOI： 10.1002/advs.202304461 　

ISSN： 2198-3844

eISSN： 2198-3844

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Abstract A current key challenge in 2D materials is the realization of emergent quantum phenomena in hetero structures via controlling the moiré potential created by the periodicity mismatch between adjacent layers, as highlighted by the discovery of superconductivity in twisted bilayer graphene. Generally, the lattice structure of the original host material remains unchanged even after the moiré superlattice is formed. However, much less attention is paid for the possibility that the moiré potential can also modify the original crystal structure itself. Here, it is demonstrated that octahedral MoTe₂ which is unstable in bulk is stabilized in a commensurate MoTe₂/graphene hetero‐bilayer due to the moiré potential created between the two layers. It is found that the reconstruction of electronic states via the moiré potential is responsible for this stabilization, as evidenced by the energy‐gap opening at the Fermi level observed by angle‐resolved photoemission and scanning tunneling spectroscopies. The present results provide a fresh approach to realize novel 2D quantum phases by utilizing the moiré potential.
Thermally Reentrant Crystalline Phase Change in Perovskite‐Derivative Nickelate Enabling Reversible Switching of Room‐Temperature Electrical Resistivity Peer-reviewed

Kota Matsumoto, Hideyuki Kawasoko, Eiji Nishibori, Tomoteru Fukumura

Advanced Science　10　(26)　2304978　2023/09
Publisher: Wiley
DOI： 10.1002/advs.202304978 　

ISSN： 2198-3844

eISSN： 2198-3844

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Abstract Reversible switching of room‐temperature electrical resistivity due to crystal‐amorphous transition is demonstrated in various chalcogenides for development of non‐volatile phase change memory. However, such reversible thermal switching of room‐temperature electrical resistivity has not reported in transition metal oxides so far, despite their enormous studies on the electrical conduction like metal‐insulator transition and colossal magnetoresistance effect. In this study, a thermally reversible switching of room‐temperature electrical resistivity is reported with gigantic variation in a layered nickelate Sr_2.5Bi_0.5NiO₅ (1201‐SBNO) composed of (Sr_1.5Bi_0.5)O₂ rock‐salt and SrNiO₃ perovskite layers via unique crystalline phase changes between the conducting 1201‐SBNO with ordered (O‐1201), disordered Sr/Bi arrangements in the (Sr_1.5Bi_0.5)O₂ layer (D‐1201), and insulating oxygen‐deficient double perovskite Sr₂BiNiO_4.5 (d‐perovskite). The O‐1201 is reentrant by high‐temperature annealing of ≈1000 °C through crystalline phase change into the D‐1201 and d‐perovskite, resulting in the thermally reversible switching of room‐temperature electrical resistivity with 10²‐ and 10⁹‐fold variation, respectively. The 1201‐SBNO is the first oxide to show the thermally reversible switching of room‐temperature electrical resistivity via the crystalline phase changes, providing a new perspective on the electrical conduction for transition metal oxides.
Slow magnetic relaxation in a ferromagnetic Cu^II chain complex, induced by a phonon bottleneck effect

Sailaja S. Sunkari, Abhineet Verma, Om Pandey, Shraddha Gupta, Masanori Wakizaka, Shinya Takaishi, Hideyuki Kawasoko, Tomoteru Fukumura, Masahiro Yamashita

Dalton Transactions　52　(36)　12604-12607　2023/09
Publisher: Royal Society of Chemistry (RSC)
DOI： 10.1039/d3dt02244g 　

ISSN： 1477-9226

eISSN： 1477-9234

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First observation of slow magnetic relaxation induced by a phonon bottleneck effect in a ferromagnetically coupled Cu^II polymer chain compound, Cu(dipic)(OH₂)₂, is reported.
Near-Ultraviolet Light-Driven Photocathodic Activity for (001)-Oriented BiOCl Thin Films Synthesized by Mist Chemical Vapor Deposition

Zaichun Sun, Shaoyong Qin, Daichi Oka, Huijuan Zhang, Tomoteru Fukumura, Yuji Matsumoto, Bingchu Mei

Inorganic Chemistry　62　(23)　8914-8922　2023/05/31
Publisher: American Chemical Society (ACS)
DOI： 10.1021/acs.inorgchem.3c00466 　

ISSN： 0020-1669

eISSN： 1520-510X
Charge-density wave associated with higher-order Fermi-surface nesting in monolayer VS2

Tappei Kawakami, Katsuaki Sugawara, Hirofumi Oka, Kosuke Nakayama, Ken Yaegashi, Seigo Souma, Takashi Takahashi, Tomoteru Fukumura, Takafumi Sato

npj 2D Materials and Applications　7　(1)　2023/05/02
Publisher: Springer Science and Business Media LLC
DOI： 10.1038/s41699-023-00395-z 　

eISSN： 2397-7132

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Abstract Fermi-surface (FS) nesting originating from Peierls’ idea of electronic instabilities in one-dimensional materials is a key concept to stabilize charge-density wave (CDW), whereas its applicability to two-dimensional (2D) materials is under intensive debate. Here we report unusual CDW associated with the higher-order FS nesting in monolayer 2D VS2. Angle-resolved photoemission spectroscopy and scanning tunneling microscopy uncovered stripe CDW with $$\sqrt {21} R10.9^\circ \times \sqrt 3 R30^\circ$$ periodicity together with an energy-gap opening on the entire FS. We suggest that this CDW involves the higher-order FS-nesting vector 2q twice larger than that of the normal one (q), as supported by the anomalies in the calculated phonon dispersion and electronic susceptibility. The present results suggest that the cooperation of q and 2q nesting leads to the fully gapped CDW state unlike the case of conventional single q nesting which produces a partial gap, pointing to an intriguing mechanism of CDW transition.
Rock-salt Type LaSb Epitaxial Thin Film Grown by Multilayer Solid-phase Epitaxy at High Temperature Close to 1000 °C

Noriyuki Ishigane, Hideyuki Kawasoko, Yuki Yamamoto, Tomoteru Fukumura

Chemistry Letters　52　(4)　263-266　2023/04/05
Publisher: The Chemical Society of Japan
DOI： 10.1246/cl.230020 　

ISSN： 0366-7022

eISSN： 1348-0715
Charge order with unusual star-of-David lattice in monolayer <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msub><mml:mrow><mml:mi>NbTe</mml:mi></mml:mrow><mml:mn>2</mml:mn></mml:msub></mml:math>

Taiki Taguchi, Katsuaki Sugawara, Hirofumi Oka, Tappei Kawakami, Yasuaki Saruta, Takemi Kato, Kosuke Nakayama, Seigo Souma, Takashi Takahashi, Tomoteru Fukumura, Takafumi Sato

Physical Review B　107　(4)　2023/01/17
Publisher: American Physical Society (APS)
DOI： 10.1103/physrevb.107.l041105 　

ISSN： 2469-9950

eISSN： 2469-9969
A transparent room-temperature ferromagnetic semiconductor on glass: anatase Co-doped TiO₂ oriented thin films with improved electrical conduction

Jiyang Huang, Daichi Oka, Yasushi Hirose, Masamichi Negishi, Tomoteru Fukumura

CrystEngComm　25　(34)　4907-4913　2023
Publisher: Royal Society of Chemistry (RSC)
DOI： 10.1039/d3ce00364g 　

eISSN： 1466-8033

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(101)-Oriented anatase Ti_0.95Co_0.05O_2−δ thin films were grown on rigid and flexible glass substrates by using TiO₂ seed layers. The thin films exhibited ferromagnetic semiconducting properties comparable to those of epitaxial thin films.
Thickness-dependent magnetotransport properties of rocksalt NdO epitaxial thin films: observation of a ferromagnetic phase far above the Curie temperature

Daichi Saito, Daichi Oka, Kenichi Kaminaga, Miho Kitamura, Daisuke SHIGA, Hiroshi Kumigashira, Tomoteru Fukumura

Journal of Materials Chemistry C　2023
Publisher: Royal Society of Chemistry (RSC)
DOI： 10.1039/d3tc02478d 　

ISSN： 2050-7526

eISSN： 2050-7534

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We investigated magnetotransport properties of rock-salt NdO (001) epitaxial thin films with different thicknesses. For the thickness of 45 nm, the NdO thin film behaved as a ferromagnetic metal with...
Rocksalt CeO epitaxial thin film as a heavy-fermion system transiting from <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mi>p</mml:mi></mml:math> -type metal to partially compensated <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mi>n</mml:mi></mml:math> -type metal by <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mn>4</mml:mn><mml:mi>f</mml:mi></mml:mrow></mml:math> delocalization

Nobuto Abe, Daichi Oka, Kenichi Kaminaga, Daisuke Shiga, Daichi Saito, Taku Yamamoto, Noriaki Kimura, Hiroshi Kumigashira, Tomoteru Fukumura

Physical Review B　106　(12)　2022/09/06
Publisher: American Physical Society (APS)
DOI： 10.1103/physrevb.106.125106 　

ISSN： 2469-9950

eISSN： 2469-9969
Superconductivity and improved electrical conduction in anti-ThCr2Si2-type RE2O2Sb and RE2O2Bi with pnictogen square net Peer-reviewed

Hideyuki Kawasoko, Tomoteru Fukumura

iScience　25　(8)　104742-104742　2022/08
Publisher: Elsevier {BV}
DOI： 10.1016/j.isci.2022.104742 　
Rock salt-type HoO epitaxial thin film as a heavy rare-earth monoxide ferromagnetic semiconductor with a Curie temperature above 130 K

Tahta Amrillah, Daichi Oka, Hirokazu Shimizu, Satoshi Sasaki, Daichi Saito, Kenichi Kaminaga, Tomoteru Fukumura

Applied Physics Letters　120　(8)　082403-082403　2022/02/21
Publisher: AIP Publishing
DOI： 10.1063/5.0081040 　

ISSN： 0003-6951

eISSN： 1077-3118

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Ho monopnictides (Ho Pn: Pn = N, P, As, Sb, and Bi) and monochalcogenides (Ho Ch: Ch = S, Se, and Te) are known to possess a nontrivial magnetic structure, while solid-phase HoO has not been synthesized yet. In this study, a rock salt-type HoO epitaxial thin film was grown by using the pulsed laser deposition method, which had a bandgap of 0.11 eV and tunable electrical conduction via its oxygen nonstoichiometry. Its Curie temperature, above 130 K, was much higher than those of Ho Pn and Ho Ch, most likely due to an enhanced direct exchange interaction. Similar to Ho Pn and Ho Ch, a HoO thin film showed a metamagnetic behavior below the Curie temperature in spite of its dominant ferromagentic ordering.
Temperature-dependent optical properties of ε-Ga2O3 thin films International-journal Peer-reviewed

Takayuki Makino, Subaru Yusa, Daichi Oka, Tomoteru Fukumura

Japanese Journal of Applied Physics　2022/02/01
Publisher: Institute of Physics
DOI： 10.35848/1347-4065/ac2215 　
Rocksalt-type PrO epitaxial thin film as a weak ferromagnetic Kondo lattice

Hirokazu Shimizu, Daichi Oka, Kenichi Kaminaga, Daichi Saito, Taku Yamamoto, Nobuto Abe, Noriaki Kimura, Daisuke Shiga, Hiroshi Kumigashira, Tomoteru Fukumura

Physical Review B　105　(1)　2022/01/31
Publisher: American Physical Society (APS)
DOI： 10.1103/physrevb.105.014442 　

ISSN： 2469-9950

eISSN： 2469-9969
Heterospin frustration in a metal-fullerene-bonded semiconductive antiferromagnet International-coauthorship Peer-reviewed

Shen, Yongbing, Cui, Mengxing, Takaishi, Shinya, Kawasoko, Hideyuki, Sugimoto, Kunihisa, Tsumuraya, Takao, Otsuka, Akihiro, Kwon, Eunsang, Yoshida, Takefumi, Hoshino, Norihisa, Kawachi, Kazuhiko, Kasama, Yasuhiko, Akutagawa, Tomoyuki, Fukumura, Tomoteru, Yamashita, Masahiro

Nature Communications　13　(1)　495-495　2022/01/25
Publisher: Springer Science and Business Media {LLC}
DOI： 10.1038/s41467-022-28134-w 　

eISSN： 2041-1723

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Abstract Lithium-ion-encapsulated fullerenes (Li⁺@C₆₀) are 3D superatoms with rich oxidative states. Here we show a conductive and magnetically frustrated metal–fullerene-bonded framework {[Cu₄(Li@C₆₀)(L)(py)₄](NTf₂)(hexane)}_n (1) (L = 1,2,4,5-tetrakis(methanesulfonamido)benzene, py = pyridine, NTf₂⁻ = bis(trifluoromethane)sulfonamide anion) prepared from redox-active dinuclear metal complex Cu₂(L)(py)₄ and lithium-ion-encapsulated fullerene salt (Li⁺@C₆₀)(NTf₂⁻). Electron donor Cu₂(L)(py)₂ bonds to acceptor Li⁺@C₆₀ via eight Cu‒C bonds. Cu–C bond formation stems from spontaneous charge transfer (CT) between Cu₂(L)(py)₄ and (Li⁺@C₆₀)(NTf₂⁻) by removing the two-terminal py molecules, yielding triplet ground state [Cu₂(L)(py)₂]⁺(Li⁺@C₆₀^•−), evidenced by absorption and electron paramagnetic resonance (EPR) spectra, magnetic properties and quantum chemical calculations. Moreover, Li⁺@C₆₀^•− radicals (S = ½) and Cu²⁺ ions (S = ½) interact antiferromagnetically in triangular spin lattices in the absence of long-range magnetic ordering to 1.8 K. The low-temperature heat capacity indicated that compound 1 is a potential candidate for an S = ½ quantum spin liquid (QSL).
A high-T_C heavy rare earth monoxide semiconductor TbO with a more than half-filled 4f orbital

Satoshi Sasaki, Daichi Oka, Kenichi Kaminaga, Daichi Saito, Taku Yamamoto, Nobuto Abe, Hirokazu Shimizu, Tomoteru Fukumura

Dalton Transactions　2022
Publisher: Royal Society of Chemistry (RSC)
DOI： 10.1039/d2dt02710k 　

ISSN： 1477-9226

eISSN： 1477-9234

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A rock-salt structured terbium monoxide, TbO, was synthesized for the first time in the solid phase. This TbO is a high T_C (231 K) ferromagnetic semiconductor, probably forming 4f and 5f magnetic sublattices at a single magnetic Tb²⁺ site.
Versatile control of the superconducting transition temperature in anti-ThCr2Si2-type Y2O2Bi via H, Li, or F doping

Kyohei Terakado, Hideyuki Kawasoko, Tomoteru Fukumura

Dalton Transactions　51　(3)　847-851　2022
Publisher: Royal Society of Chemistry (RSC)
DOI： 10.1039/d1dt04023e 　

ISSN： 1477-9226

eISSN： 1477-9234

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In anti-ThCr₂Si₂-type Y₂O₂Bi with a Bi square net, the superconducting transition temperature (<italic>T</italic>_c) is scaled by unit cell tetragonality (<italic>c</italic>/<italic>a</italic>) <italic>via</italic> not only O intercalation but also H/F substitution and Li intercalation.
Electron localization induced by intrinsic anion disorder in a transition metal oxynitride

Daichi Oka, Yasushi Hirose, Shoichiro Nakao, Tomoteru Fukumura, Tetsuya Hasegawa

Communications Physics　4　(1)　2021/12
Publisher: Springer Science and Business Media LLC
DOI： 10.1038/s42005-021-00777-z 　

eISSN： 2399-3650

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<title>Abstract</title>Anderson localization derived from randomness plays a crucial role in various kinds of phase transitions. Although treated as a free variable parameter in theory, randomness in electronic materials is hard to control experimentally owing to the coexisting Coulomb interaction. Here we demonstrate that the intrinsic anion disorder in a mixed-anion system of SrNbO₂N induces a significant random potential that overwhelms the Coulomb potential while maintaining the lattice structure. A metal-to-insulator transition is triggered by a chemical modulation of the electron density where the critical electron density is more than three orders of magnitude greater than that predicted by the well-known Mott criterion. The localized electrons show characteristic electrical properties such as temperature-dependent multiple crossovers of conduction mechanisms and a positive magnetoresistance above 50% at low temperature. The large magnetoresistance is attributed to wave-function shrinkage of the localized states and clearly visualizes the anisotropy in the band structure, which indicates a compatibility of the periodicity and randomness.
Large magnetoresistance of a compensated metal Cu2Sb correlated with its Fermi surface topology

Mizuki Endo, Hideyuki Kawasoko, Seigo Soma, Kunihiko Yamauchi, Miho Kitamura, Koji Horiba, Hiroshi Kumigashira, Noriaki Kimura, Tamio Oguchi, Takafumi Sato, Tomoteru Fukumura

Physical Review Materials　5　(10)　2021/10/06
Publisher: American Physical Society (APS)
DOI： 10.1103/physrevmaterials.5.105002 　

eISSN： 2475-9953
Robust charge-density wave strengthened by electron correlations in monolayer 1T-TaSe2 and 1T-NbSe2

Yuki Nakata, Katsuaki Sugawara, Ashish Chainani, Hirofumi Oka, Changhua Bao, Shaohua Zhou, Pei-Yu Chuang, Cheng-Maw Cheng, Tappei Kawakami, Yasuaki Saruta, Tomoteru Fukumura, Shuyun Zhou, Takashi Takahashi, Takafumi Sato

NATURE COMMUNICATIONS　12　(1)　2021/10

DOI： 10.1038/s41467-021-26105-1 　

eISSN： 2041-1723
Single Molecular Adsorption of Terbium(III) Bis-phthalocyaninato (TbPc2) Governed by Two Surface Reconstructions of Perovskite Type SrVO3 Epitaxial Ultrathin Film

Hirofumi Oka, Keiichi Katoh, Yoshinori Okada, Daichi Oka, Taro Hitosugi, Masahiro Yamashita, Tomoteru Fukumura

Chemistry Letters　50　(8)　1489-1492　2021/08/05
Publisher: The Chemical Society of Japan
DOI： 10.1246/cl.210270 　

ISSN： 0366-7022

eISSN： 1348-0715
Erratum: Temperature dependence of dielectric functions in Yb2O3and Lu2O3epitaxial thin films on sapphire (0001) (Jpn. J. Appl. Phys. (2020) 59 (SCCB13) DOI: 10.7567/1347-4065/ab4a88)

Takayuki Makino, Takaho Asai, Tomoya Takeuchi, Kenichi Kaminaga, Daichi Oka, Tomoteru Fukumura

Japanese Journal of Applied Physics　60　(8)　2021/08/01
Publisher: IOP Publishing Ltd
DOI： 10.35848/1347-4065/ac1734 　

ISSN： 1347-4065 0021-4922
Systematic Application of Extremely Large Strain to Rutile-Type RuO2(100) Epitaxial Thin Films on Substrates with Large Lattice Mismatches

Zainab Fatima, Daichi Oka, Tomoteru Fukumura

Crystal Growth & Design　21　(7)　4083-4089　2021/07/07
Publisher: American Chemical Society (ACS)
DOI： 10.1021/acs.cgd.1c00377 　

ISSN： 1528-7483

eISSN： 1528-7505
B-Site Stoichiometry Control of the Magnetotransport Properties of Epitaxial Sr2FeMoO6 Thin Film

Nand Kumar, Raveena Gupta, Ripudaman Kaur, Daichi Oka, Sonali Kakkar, Sanjeev Kumar, Surendra Singh, Tomoteru Fukumura, Chandan Bera, Suvankar Chakraverty

ACS Applied Electronic Materials　3　(2)　597-604　2021/02/23
Publisher: American Chemical Society ({ACS})
DOI： 10.1021/acsaelm.0c00933 　

ISSN： 2637-6113

eISSN： 2637-6113
Synthesis of Stoichiometric SrTiO3 and Its Carrier Doping from Air-Stable Bimetallic Complexes

Ebube E. Oyeka, Daichi Oka, Eunsang Kwon, Tomoteru Fukumura

Inorganic Chemistry　2021/02/01
Publisher: American Chemical Society ({ACS})
DOI： 10.1021/acs.inorgchem.0c03457 　

ISSN： 0020-1669

eISSN： 1520-510X
Low-temperature topotactic oxidation using the solid-state oxidant Zr-doped CeO2

Masanagi Abe, Hideyuki Kawasoko, Tomoteru Fukumura

Chemical Communications　57　(86)　11326-11329　2021
Publisher: Royal Society of Chemistry (RSC)
DOI： 10.1039/d1cc03772b 　

ISSN： 1359-7345

eISSN： 1364-548X

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Zr-doped CeO₂ is an efficient solid-state oxidant for topotactic oxidation to make Y₂O₂Bi superconducting with the highest transition temperature.
Increased hole mobility in anti-ThCr2Si2-type La2O2Bi co-sintered with alkaline earth metal oxides for oxygen intercalation and hole carrier doping

Kota Matsumoto, Hideyuki Kawasoko, Noriaki Kimura, Tomoteru Fukumura

Dalton Transactions　50　(19)　6637-6641　2021
Publisher: Royal Society of Chemistry (RSC)
DOI： 10.1039/d0dt04288a 　

ISSN： 1477-9226

eISSN： 1477-9234

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La₂O₂Bi co-sintered with alkaline earth oxides showed higher hole mobility than ever due to effective oxygen intercalation. SrO also served as a hole dopant.
High electrical conduction of the Sb square net in an anti-ThCr2Si2 type La2O2Sb thin film grown by multilayer solid-phase epitaxy

Yuki Yamamoto, Hideyuki Kawasoko, Tomoteru Fukumura

Journal of Materials Chemistry C　2021
Publisher: Royal Society of Chemistry (RSC)
DOI： 10.1039/d1tc00747e 　

ISSN： 2050-7526

eISSN： 2050-7534

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Extremely large reduction of resistivity was demonstrated in La₂O₂Sb with a Sb square net by forming an epitaxial thin film.
Hard and soft x-ray photoemission spectroscopy study of the new Kondo system SmO thin film

Shoya Sakamoto, Kenichi Kaminaga, Daichi Oka, Ryu Yukawa, Masafumi Horio, Yuichi Yokoyama, Kohei Yamamoto, Kou Takubo, Yosuke Nonaka, Keisuke Koshiishi, Masaki Kobayashi, Arata Tanaka, Akira Yasui, Eiji Ikenaga, Hiroki Wadati, Hiroshi Kumigashira, Tomoteru Fukumura, Atsushi Fujimori

Physical Review Materials　4　(9)　2020/09/18
Publisher: American Physical Society (APS)
DOI： 10.1103/physrevmaterials.4.095001 　

eISSN： 2475-9953
Rock salt structure GdO epitaxial thin film with a high ferromagnetic Curie temperature Peer-reviewed

Taku Yamamoto, Kenichi Kaminaga, Daichi Saito, Daichi Oka, Tomoteru Fukumura

Applied Physics Letters　117　(5)　052402-052402　2020/08/03
Publisher: AIP Publishing
DOI： 10.1063/5.0017954 　

ISSN： 0003-6951

eISSN： 1077-3118
Direct growth and electrical properties of YH2 (111) epitaxial thin films on CaF2 (111) and (001) substrates by reactive magnetron sputtering

Tomoteru Fukumura

Chemistry Letters　49　(10)　1181-1184　2020/07/07
Publisher: The Chemical Society of Japan
DOI： 10.1246/cl.200420 　

ISSN： 1348-0715

eISSN： 1348-0715
Increased electrical conduction with high hole mobility in anti-ThCr2Si2-type La2O2Bi via oxygen intercalation adjacent to Bi square net Peer-reviewed

Kota Matsumoto, Hideyuki Kawasoko, Hidetaka Kasai, Eiji Nishibori, Tomoteru Fukumura

Applied Physics Letters　116　191901　2020/05/11

DOI： 10.1063/5.0005300 　
Metal-to-insulator transition in Ruddlesden-Popper-type Srn+1VnO3n+1 (n = 1, 2) epitaxial thin films as a function of strain and VO2 stacking layer number Peer-reviewed

Shintaro Fukuda, Daichi Oka, Tomoteru Fukumura

Applied Physics Letters　116　(12)　123101-123101　2020/03/23
Publisher: AIP Publishing
DOI： 10.1063/1.5136319 　

ISSN： 0003-6951

eISSN： 1077-3118
Temperature dependence of dielectric functions in Yb2O3 and Lu2O3 epitaxial thin films on sapphire (0001)

Tomoteru Fukumura

Japanese Journal of Applied Physics　59　(SC)　SCCB13-SCCB13　2020/02/01
Publisher: IOP Publishing
DOI： 10.7567/1347-4065/ab4a88 　

ISSN： 1347-4065

eISSN： 1347-4065
Synthesis and electronic properties of meso -tetra(3,4,5-trimethoxy)phenyl-porphyrin and -tetrabenzoporphyrin and their phosphorus complexes

Furuyama, T., Takahashi, Y., Fukumura, T., Bacilla, A.C.C., Kobayashi, N.

Journal of Porphyrins and Phthalocyanines　24　(1-3)　105-111　2020

DOI： 10.1142/S1088424619500871 　

ISSN： 1099-1409

eISSN： 1099-1409
Width-induced metal-insulator transition in SrVO<inf>3</inf>lateral nanowires spontaneously formed on the ultrathin film Peer-reviewed

Oka, H., Okada, Y., Kaminaga, K., Oka, D., Hitosugi, T., Fukumura, T.

Applied Physics Letters　117　(5)　051603-051603　2020
Publisher: AIP Publishing
DOI： 10.1063/5.0018240 　

ISSN： 0003-6951

eISSN： 1077-3118
Epitaxial growth of bismuth oxyhalide thin films using mist CVD at atmospheric pressure Peer-reviewed

Zaichun Sun, Daichi Oka, Tomoteru Fukumura

Chemical Communications　2020
Publisher: Royal Society of Chemistry ({RSC})
DOI： 10.1039/D0CC03431B 　

ISSN： 1359-7345

eISSN： 1364-548X

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Flat and highly crystalline bismuth oxyhalide epitaxial thin films were grown with a tunable lattice strain.
Thickness Effects on Crystal Growth and Metal–Insulator Transition in Rutile-Type RuO<inf>2</inf> (100) Thin Films Peer-reviewed

Kutsuzawa, D., Oka, D., Fukumura, T.

Physica Status Solidi (B) Basic Research　2000188-2000188　2020
Publisher: Wiley
DOI： 10.1002/pssb.202000188 　

ISSN： 0370-1972

eISSN： 1521-3951
High-κ dielectric ε-Ga2O3 stabilized in a transparent heteroepitaxial structure grown by mist CVD at atmospheric pressure Peer-reviewed

Subaru Yusa, Daichi Oka, Tomoteru Fukumura

CrystEngComm　2020
Publisher: Royal Society of Chemistry ({RSC})
DOI： 10.1039/C9CE01532A 　
Tetragonality induced superconductivity in anti-ThCr2Si2-type RE2O2Bi (RE = rare earth) with Bi square nets Peer-reviewed

Ryosuke Sei, Hideyuki Kawasoko, Kota Matsumoto, Masato Arimitsu, Kyohei Terakado, Daichi Oka, Shintaro Fukuda, Noriaki Kimura, Hidetaka Kasai, Eiji Nishibori, Kenji Ohoyama, Akinori Hoshikawa, Toru Ishigaki, Tetsuya Hasegawa, Tomoteru Fukumura

Dalton Transactions　2020
Publisher: Royal Society of Chemistry ({RSC})
DOI： 10.1039/C9DT04640B 　
Analyses on atomic arrangement in dielectric ϵ-Ga<inf>2</inf>O<inf>3</inf> epitaxial thin films

Oka, D., Yusa, S., Kimura, K., Ang, A.K.R., Happo, N., Hayashi, K., Fukumura, T.

Japanese Journal of Applied Physics　59　(1)　010601-010601　2020
Publisher: Japan Society of Applied Physics
DOI： 10.7567/1347-4065/ab58a1 　

ISSN： 0021-4922

eISSN： 1347-4065
Temperature dependence of dielectric functions in Yb<inf>2</inf>O<inf>3</inf> and Lu<inf>2</inf>O<inf>3</inf> epitaxial thin films on sapphire (0001) Peer-reviewed

Makino, T., Asai, T., Takeuchi, T., Kaminaga, K., Oka, D., Fukumura, T.

Japanese Journal of Applied Physics　59　(SC)　SCCB13-SCCB13　2020
Publisher: Japan Society of Applied Physics
DOI： 10.7567/1347-4065/ab4a88 　

ISSN： 0021-4922

eISSN： 1347-4065
Epitaxial Growth of β-Bi2O3 Thin Films and Particles with Mist Chemical Vapor Deposition Peer-reviewed

Zaichun Sun, Daichi Oka, Tomoteru Fukumura

Crystal Growth & Design　19　(12)　7170-7174　2019/12/04
Publisher: American Chemical Society ({ACS})
DOI： 10.1021/acs.cgd.9b01033 　
Investigation of magnetism and magnetic structure of anti-ThCr2Si2-type Tb2O2Bi by magnetization and neutron diffraction measurements Peer-reviewed

Hideyuki Kawasoko, Kenji Ohoyama, Ryosuke Sei, Kota Matsumoto, Daichi Oka, Akinori Hoshikawa, Toru Ishigaki, Tomoteru Fukumura

AIP Advances　2019/11/01

DOI： 10.1063/1.5126399 　
Heteroepitaxy of Rock-salt Superconductor/Ferromagnet Thin Film: LaO/EuO Peer-reviewed

Tomoteru Fukumura

Chemistry Letters　48　(10)　1244-1247　2019/10/05

DOI： 10.1246/cl.190460 　

ISSN： 0366-7022 1348-0715
Interstitialcy diffusion of fluoride ions in LaOF by DFT-based first-principles calculations

Mayuko Oka, Hideyuki Kamisaka, Tomoteru Fukumura, Tetsuya Hasegawa

Computational Materials Science　167　92-99　2019/09/01
Publisher: Elsevier B.V.
DOI： 10.1016/j.commatsci.2019.05.028 　

ISSN： 0927-0256
Itinerant ferromagnetism in rocksalt NdO epitaxial thin films Peer-reviewed

Tomoteru Fukumura

Physical Review Materials　3　(064407)　1-4　2019/06/13

DOI： 10.1103/physrevmaterials.3.064407 　

ISSN： 2475-9953
Synthesis, Structural and Optical Properties of Tetrabenzoporphyrin Complexes Bearing Four or Eight Peripheral Phenyl Groups Peer-reviewed

Taniyuki Furuyama, Tetsuo Okujima, Kota Muramatsu, Yuichi Takahashi, Akihiro Mikami, Tomoteru Fukumura, Shigeki Mori, Takahiro Nakae, Masayoshi Takase, Hidemitsu Uno, Nagao Kobayashi

European Journal of Organic Chemistry　2019　(20)　3224-3235　2019/06/02

DOI： 10.1002/ejoc.201900528 　

ISSN： 1434-193X

eISSN： 1099-0690
High electron mobility with significant spin-orbit coupling in rock-salt YbO epitaxial thin film Peer-reviewed

Taku Yamamoto, Kenichi Kaminaga, Daichi Saito, Daichi Oka, Tomoteru Fukumura

Applied Physics Letters　114　(16)　162104-162104　2019/04/22
Publisher: AIP Publishing
DOI： 10.1063/1.5085938 　

ISSN： 0003-6951

eISSN： 1077-3118
Application of X-ray fluorescence holography to the analysis of the interior and surface of an yttrium oxide thin film Peer-reviewed

Tomoteru Fukumura

Surface and Interface Analysis　51　(1)　70-73　2019/01

DOI： 10.1002/sia.6550 　

ISSN： 0142-2421
Inorganic materials

Tomoteru Fukumura, Daichi Oka

3d Local Structure And Functionality Design Of Materials　151-169　2018/12/21
Publisher: World Scientific Publishing Co.
DOI： 10.1142/9789813273672_0009 　
Density functional theory-based ab initio molecular dynamics simulation of ionic conduction in N-/F-doped ZrO2 under epitaxial strain

Mayuko Oka, Hideyuki Kamisaka, Tomoteru Fukumura, Tetsuya Hasegawa

Computational Materials Science　154　91-96　2018/11/01
Publisher: Elsevier B.V.
DOI： 10.1016/j.commatsci.2018.07.038 　

ISSN： 0927-0256
New Lutetium Oxide: Electrically Conducting Rock-Salt LuO Epitaxial Thin Film Peer-reviewed

Kenichi Kaminaga, Daichi Oka, Tetsuya Hasegawa, Tomoteru Fukumura

ACS Omega　3　(10)　12501-12504　2018/10/31
Publisher: American Chemical Society ({ACS})
DOI： 10.1021/acsomega.8b02082 　

ISSN： 2470-1343

eISSN： 2470-1343
Two distinct surface terminations of SrVO3 (001) ultrathin films as an influential factor on metallicity Peer-reviewed

Hirofumi Oka, Yoshinori Okada, Taro Hitosugi, Tomoteru Fukumura

Applied Physics Letters　113　(17)　171601-171601　2018/10/22
Publisher: {AIP} Publishing
DOI： 10.1063/1.5051434 　
Anion-Substitution-Induced Nonrigid Variation of Band Structure in SrNbO3- xN x (0 ≤ x ≤ 1) Epitaxial Thin Films. International-journal Peer-reviewed

Daichi Oka, Yasushi Hirose, Masanori Kaneko, Shoichiro Nakao, Tomoteru Fukumura, Koichi Yamashita, Tetsuya Hasegawa

ACS applied materials & interfaces　10　(41)　35008-35015　2018/10/17
Publisher: American Chemical Society ({ACS})
DOI： 10.1021/acsami.8b08577 　

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Pervoskite oxynitrides exhibit rich functionalities such as colossal magnetoresistance and high photocatalytic activity. The wide tunability of physical properties by the N/O ratio makes perovskite oxynitrides promising as optical and electrical materials. However, composition-dependent variation of the band structure, especially under partially substituted composition, is not yet well understood. In this study, we quantitatively analyzed the composition-dependent variation of band structure of a series of SrNbO3- xN x (0 ≤ x ≤ 1.02) epitaxial thin films. Electrical conductivity decreased along with the increase of N content x as a result of an increase in Nb valence from 4+ to 5+. Optical measurements revealed that the N 2p band is formed at a critical composition between 0.07 < x < 0.38, which induces charge-transfer transition (CTT) in the visible-light region. These variations in the band structure were explained by first-principles calculations. However, the CTT energy slightly increased at higher N contents (i.e., lower carrier density) on contrary to the expectation based on the rigid-band-like shift of the Fermi level, which suggests a complex combination of the following band-shifting effects induced by N-substitution: whereas (1) reduction of the Burstein-Moss effect causes CTT energy reduction, (2) enhancement of hybridization between Nb 4d and N 2p orbitals and/or (3) suppression of many-body effects enlarge the band gap energy at larger N content. The band structure variation in perovskite oxynitride as presently elucidated would be a guidepost for future material design.
Superconductivity in Anti-ThCr2Si2-type Er2O2Bi Induced by Incorporation of Excess Oxygen with CaO Oxidant Peer-reviewed

Tomoteru Fukumura

Inorganic Chemistry　57　(17)　10587-10590　2018/09/04
Publisher: American Chemical Society ({ACS})
DOI： 10.1021/acs.inorgchem.8b01199 　

ISSN： 0020-1669 1520-510X
Superconductivity of Rock-Salt Structure LaO Epitaxial Thin Film Peer-reviewed

Tomoteru Fukumura

Journal of the American Chemical Society　140　(22)　6754-6757　2018/06/06

DOI： 10.1021/jacs.8b03009 　

ISSN： 0002-7863 1520-5126
A valence-selective X-ray fluorescence holography study of an yttrium oxide thin film Peer-reviewed

Stellhorn, J.R., Hosokawa, S., Happo, N., Tajiri, H., Matsushita, T., Kaminaga, K., Fukumura, T., Hasegawa, T., Hayashi, K.

Journal of Applied Crystallography　50　(6)　1583-1589　2017/12

DOI： 10.1107/S1600576717012821 　
Magnetic and magnetotransport properties of ThCr2Si2-type Ce2O2Bi composed of conducting Bi2- square net and magnetic Ce-O layer Peer-reviewed

Shunsuke Shibata, Ryosuke Sei, Tomoteru Fukumura, Tetsuya Hasegawa

APPLIED PHYSICS LETTERS　110　(19)　192410　2017/05

DOI： 10.1063/1.4983280 　

ISSN： 0003-6951

eISSN： 1077-3118
Crystal engineering for novel functionalities with oxide thin film epitaxy Invited Peer-reviewed

Daichi Oka, Tomoteru Fukumura

CRYSTENGCOMM　19　(16)　2144-2162　2017/04

DOI： 10.1039/c7ce00322f 　

ISSN： 1466-8033
Samarium monoxide epitaxial thin film as a possible heavy-fermion compound Peer-reviewed

Uchida, Y., Kaminaga, K., Fukumura, T., Hasegawa, T.

Physical Review B　95　(12)　2017/03/08

DOI： 10.1103/PhysRevB.95.125111 　

ISSN： 2469-9950
The Recovery of a Magnetically Dead Layer on the Surface of an Anatase (Ti,Co)O-2 Thin Film via an Ultrathin TiO2 Capping Layer Peer-reviewed

Thantip S. Krasienapibal, Tomoteru Fukumura, Tetsuya Hasegawa

ELECTRONICS　6　(1)　2017/03

DOI： 10.3390/electronics6010023 　

ISSN： 2079-9292
Topotactic fluorination of perovskite strontium ruthenate thin films using polyvinylidene fluoride Peer-reviewed

K. Kawahara, A. Chikamatsu, T. Katayama, T. Onozuka, D. Ogawa, K. Morikawa, E. Ikenaga, Y. Hirose, I. Harayama, D. Sekiba, T. Fukumura, T. Hasegawa

CRYSTENGCOMM　19　(2)　313-317　2017/01

DOI： 10.1039/c6ce02358d 　

ISSN： 1466-8033
Two-Dimensional Superconductivity Emerged at Monatomic Bi2- Square Net in Layered Y2O2Bi via Oxygen Incorporation Peer-reviewed

Ryosuke Sei, Suguru Kitani, Tomoteru Fukumura, Hitoshi Kawaji, Tetsuya Hasegawa

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY　138　(35)　11085-11088　2016/09

DOI： 10.1021/jacs.6b05275 　

ISSN： 0002-7863
Curie temperature of Co-doped TiO2 as functions of carrier density and Co content evaluated from electrical transport and magnetization at low temperature regime Peer-reviewed

Thantip S. Krasienapibal, Tomoteru Fukumura, Tetsuya Hasegawa

AIP ADVANCES　6　(5)　055802-055805　2016/05

DOI： 10.1063/1.4942554 　

ISSN： 2158-3226
Topotactic reductive synthesis of A-site cation-ordered perovskite YBaCo2Ox (x=4.5-5.5) epitaxial thin films Peer-reviewed

Tsukasa Katayama, Akira Chikamatsu, Tomoteru Fukumura, Tetsuya Hasegawa

JAPANESE JOURNAL OF APPLIED PHYSICS　55　(4)　04EJ05-1-4　2016/04

DOI： 10.7567/JJAP.55.04EJ05 　

ISSN： 0021-4922

eISSN： 1347-4065
A divalent rare earth oxide semiconductor: Yttrium monoxide Peer-reviewed

Kenichi Kaminaga, Ryosuke Sei, Kouichi Hayashi, Naohisa Happo, Hiroo Tajiri, Daichi Oka, Tomoteru Fukumura, Tetsuya Hasegawa

APPLIED PHYSICS LETTERS　108　(12)　122102-1-4　2016/03

DOI： 10.1063/1.4944330 　

ISSN： 0003-6951

eISSN： 1077-3118
Electric-Field Control of Magnetism in Ferromagnetic Semiconductors Peer-reviewed

Tomoteru Fukumura

Spintronics for Next Generation Innovative Devices　209-226　2016/01/08
Publisher: wiley
DOI： 10.1002/9781118751886.ch11 　
Formation of defect-fluorite structured NdNiO: XHy epitaxial thin films via a soft chemical route from NdNiO3 precursors Peer-reviewed

T. Onozuka, A. Chikamatsu, T. Katayama, T. Fukumura, T. Hasegawa

Dalton Transactions　45　(30)　12114-12118　2016
Publisher: Royal Society of Chemistry
DOI： 10.1039/c6dt01737a 　

ISSN： 1477-9234 1477-9226
Composition-induced structural, electrical, and magnetic phase transitions in AX-type mixed-valence cobalt oxynitride epitaxial thin films Peer-reviewed

Jumpei Takahashi, Yasushi Hirose, Daichi Oka, Shoichiro Nakao, Chang Yang, Tomoteru Fukumura, Isao Harayama, Daiichiro Sekiba, Tetsuya Hasegawa

APPLIED PHYSICS LETTERS　107　(23)　231906-1-5　2015/12

DOI： 10.1063/1.4937431 　

ISSN： 0003-6951

eISSN： 1077-3118
2D Electronic Transport with Strong Spin-Orbit Coupling in Bi2- Square Net of Y2O2Bi Thin Film Grown by Multi layer Solid-Phase Epitaxy Peer-reviewed

Ryosuke Sei, Tomoteru Fukumura, Tetsuya Hasegawat

ACS APPLIED MATERIALS & INTERFACES　7　(45)　24998-25001　2015/11

DOI： 10.1021/acsami.5b07825 　

ISSN： 1944-8244
Intrinsic high electrical conductivity of stoichiometric SrNbO3 epitaxial thin films Peer-reviewed

Daichi Oka, Yasushi Hirose, Shoichiro Nakao, Tomoteru Fukumura, Tetsuya Hasegawa

PHYSICAL REVIEW B　92　(20)　205102-1-5　2015/11

DOI： 10.1103/PhysRevB.92.205102 　

ISSN： 1098-0121

eISSN： 1550-235X
Topotactic synthesis of strontium cobalt oxyhydride thin film with perovskite structure Peer-reviewed

Tsukasa Katayama, Akira Chikamatsu, Hideyuki Kamisaka, Yuichi Yokoyama, Yasuyuki Hirata, Hiroki Wadati, Tomoteru Fukumura, Tetsuya Hasegawa

AIP Advances　5　(10)　1-7　2015/10

DOI： 10.1063/1.4935190 　

ISSN： 2158-3226
Effects of Cr substitution on the magnetic and transport properties and electronic states of SrRuO3 epitaxial thin films Peer-reviewed

Kaori Kurita, Akira Chikamatsu, Kei Shigematsu, Tsukasa Katayama, Hiroshi Kumigashira, Tomoteru Fukumura, Tetsuya Hasegawa

PHYSICAL REVIEW B　92　(11)　1-6　2015/09

DOI： 10.1103/PhysRevB.92.115153 　

ISSN： 1098-0121

eISSN： 1550-235X
Low temperature epitaxial growth of anatase TaON using anatase TiO2 seed layer Peer-reviewed

Atsushi Suzuki, Yasushi Hirose, Daichi Oka, Shoichiro Nakao, Tomoteru Fukumura, Tetsuya Hasegawa

JAPANESE JOURNAL OF APPLIED PHYSICS　54　(8)　080303-1-3　2015/08

DOI： 10.7567/JJAP.54.080303 　

ISSN： 0021-4922

eISSN： 1347-4065
Spontaneous formation of suboxidic coordination around Co in ferromagnetic rutile Ti_1-xCo_xO₂ (x = 0.05) film Peer-reviewed

W. Hu, K. Hayashi, T. Fukumura, K. Akagi, M. Tsukada, N. Happo, S. Hosokawa, K. Ohwada, M. Takahasi, M. Suzuki, M. Kawasaki

Applied Physics Letters　106　222403-1-5　2015/06/02

DOI： 10.1063/1.4921847 　

ISSN： 1077-3118
Spontaneous formation of suboxidic coordination around Co in ferromagnetic rutile Ti0.95Co0.05O2 film Peer-reviewed

Wen Hu, Kouichi Hayashi, Tomoteru Fukumura, Kazuto Akagi, Masaru Tsukada, Naohisa Happo, Shinya Hosokawa, Kenji Ohwada, Masamitu Takahasi, Motohiro Suzuki, Masashi Kawasaki

APPLIED PHYSICS LETTERS　106　(22)　222403-1-5　2015/06

DOI： 10.1063/1.4921847 　

ISSN： 0003-6951

eISSN： 1077-3118
Observation of magnetic domain structure in anatase (Ti,Co)O-2 thin film at room temperature Peer-reviewed

Thantip S. Krasienapibal, Shun Inoue, Tomoteru Fukumura, Tetsuya Hasegawa

APPLIED PHYSICS LETTERS　106　(20)　202402-1-4　2015/05

DOI： 10.1063/1.4921464 　

ISSN： 0003-6951

eISSN： 1077-3118
Epitaxial Strain-Controlled Ionic Conductivity in Li-Ion Solid Electrolyte Li0.33La0.56TiO3 Thin Films Peer-reviewed

Jie Wei, Daisuke Ogawa, Tomoteru Fukumura, Yasushi Hirose, Tetsuya Hasegawa

CRYSTAL GROWTH & DESIGN　15　(5)　2187-2191　2015/05

DOI： 10.1021/cg501834s 　

ISSN： 1528-7483

eISSN： 1528-7505
Topotactic reductive fluorination of strontium cobalt oxide epitaxial thin films Peer-reviewed

Tsukasa Katayama, Akira Chikamatsu, Yasushi Hirose, Tomoteru Fukumura, Tetsuya Hasegawa

JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY　73　(3)　527-530　2015/03

DOI： 10.1007/s10971-014-3499-x 　

ISSN： 0928-0707

eISSN： 1573-4846
DFT-based ab initio MD simulation of the ionic conduction in doped ZrO2 systems under epitaxial strain Peer-reviewed

M. Oka, H. Kamisaka, T. Fukumura, T. Hasegawa

PHYSICAL CHEMISTRY CHEMICAL PHYSICS　17　(43)　29057-29063　2015

DOI： 10.1039/c5cp03238e 　

ISSN： 1463-9076

eISSN： 1463-9084
Effect of central metals on Langmuir-Blodgett monolayers of phthalocyanines with flexible substituents Peer-reviewed

Shungo Kojima, Tomoteru Fukumura, Tetsuya Hasegawa

e-Journal of Surface Science and Nanotechnology　13　155-158　2015
Publisher: Surface Science Society of Japan
DOI： 10.1380/ejssnt.2015.155 　

ISSN： 1348-0391
DFT-based ab initio MD simulation of the ionic conduction in doped ZrO2 systems under epitaxial strain Peer-reviewed

M. Oka, H. Kamisaka, T. Fukumura, T. Hasegawa

PHYSICAL CHEMISTRY CHEMICAL PHYSICS　17　(43)　29057-29063　2015

DOI： 10.1039/c5cp03238e 　

ISSN： 1463-9076

eISSN： 1463-9084
Reductive Solid Phase Epitaxy of Layered Y2O2Bi with Bi2- Square Net from (Y, Bi) Powders and Y2O3 Amorphous Thin Film Peer-reviewed

Ryosuke Sei, Tomoteru Fukumura, Tetsuya Hasegawa

CRYSTAL GROWTH & DESIGN　14　(9)　4227-4229　2014/09

DOI： 10.1021/cg5009297 　

ISSN： 1528-7483

eISSN： 1528-7505
Improved room temperature electron mobility in self-buffered anatase TiO2 epitaxial thin film grown at low temperature Peer-reviewed

Thantip S. Krasienapibal, Tomoteru Fukumura, Yasushi Hirose, Tetsuya Hasegawa

JAPANESE JOURNAL OF APPLIED PHYSICS　53　(9)　2014/09

DOI： 10.7567/JJAP.53.090305 　

ISSN： 0021-4922

eISSN： 1347-4065
Metallic transport and large anomalous Hall effect at room temperature in ferrimagnetic Mn4N epitaxial thin film Peer-reviewed

Xi Shen, Akira Chikamatsu, Kei Shigematsu, Yasushi Hirose, Tomoteru Fukumura, Tetsuya Hasegawa

APPLIED PHYSICS LETTERS　105　(7)　2014/08

DOI： 10.1063/1.4893732 　

ISSN： 0003-6951

eISSN： 1077-3118
Topotactic fluorination of strontium iron oxide thin films using polyvinylidene fluoride Peer-reviewed

T. Katayama, A. Chikamatsu, Y. Hirose, R. Takagi, H. Kamisaka, T. Fukumura, T. Hasegawa

JOURNAL OF MATERIALS CHEMISTRY C　2　(27)　5350-5356　2014/07

DOI： 10.1039/c4tc00558a 　

ISSN： 2050-7526

eISSN： 2050-7534
Sr2MgMoO6-delta thin films fabricated using pulsed-laser deposition with high concentrations of oxygen vacancies Peer-reviewed

K. Shigematsu, A. Chikamatsu, T. Fukumura, S. Toyoda, E. Ikenaga, T. Hasegawa

APPLIED PHYSICS LETTERS　104　(26)　2014/06

DOI： 10.1063/1.4886136 　

ISSN： 0003-6951

eISSN： 1077-3118
Possible ferroelectricity in perovskite oxynitride SrTaO2N epitaxial thin films Peer-reviewed

Daichi Oka, Yasushi Hirose, Hideyuki Kamisaka, Tomoteru Fukumura, Kimikazu Sasa, Satoshi Ishii, Hiroyuki Matsuzaki, Yukio Sato, Yuichi Ikuhara, Tetsuya Hasegawa

SCIENTIFIC REPORTS　4　2014/05

DOI： 10.1038/srep04987 　

ISSN： 2045-2322
Carrier generation mechanism and effect of tantalum-doping in transparent conductive amorphous SnO2 thin films Peer-reviewed

Shoichiro Nakao, Yasushi Hirose, Tomoteru Fukumura, Tetsuya Hasegawa

JAPANESE JOURNAL OF APPLIED PHYSICS　53　(5)　2014/05

DOI： 10.7567/JJAP.53.05FX04 　

ISSN： 0021-4922

eISSN： 1347-4065
Metallic conductivity in infinite-layer strontium iron oxide thin films reduced by calcium hydride Peer-reviewed

T. Katayama, A. Chikamatsu, Y. Hirose, H. Kumigashira, T. Fukumura, T. Hasegawa

JOURNAL OF PHYSICS D-APPLIED PHYSICS　47　(13)　2014/04

DOI： 10.1088/0022-3727/47/13/135304 　

ISSN： 0022-3727

eISSN： 1361-6463
Fabrication and Properties of Microcapacitors with a One-nanometer-thick Single Ti0.87O2 Nanosheet Peer-reviewed

Daisuke Ogawa, Kosho Akatsuka, Tomoteru Fukumura, Minoru Osada, Takayoshi Sasaki, Tetsuya Hasegawa

CHEMISTRY LETTERS　43　(3)　307-309　2014/03

DOI： 10.1246/cl.130925 　

ISSN： 0366-7022

eISSN： 1348-0715
Quantum confinement effect in Bi anti-dot thin films with tailored pore wall widths and thicknesses Peer-reviewed

Y. Park, Y. Hirose, S. Nakao, T. Fukumura, J. Xu, T. Hasegawa

APPLIED PHYSICS LETTERS　104　(2)　2014/01

DOI： 10.1063/1.4861775 　

ISSN： 0003-6951

eISSN： 1077-3118
High-Mobility Electron Conduction in Oxynitride: Anatase TaON Peer-reviewed

Atsushi Suzuki, Yasushi Hirose, Daichi Oka, Shoichiro Nakao, Tomoteru Fukumura, Satoshi Ishii, Kimikazu Sasa, Hiroyuki Matsuzaki, Tetsuya Hasegawa

CHEMISTRY OF MATERIALS　26　(2)　976-981　2014/01

DOI： 10.1021/cm402720d 　

ISSN： 0897-4756

eISSN： 1520-5002
Heteroepitaxial Growth of Perovskite CaTaO2N Thin Films by Nitrogen Plasma-Assisted Pulsed Laser Deposition Peer-reviewed

Daichi Oka, Yasushi Hirose, Tomoteru Fukumura, Tetsuya Hasegawa

CRYSTAL GROWTH & DESIGN　14　(1)　87-90　2014/01

DOI： 10.1021/cg401176j 　

ISSN： 1528-7483

eISSN： 1528-7505
Solid phase epitaxy of EuTiO3 thin films on SrTiO3 (100) substrates with different oxygen contents Peer-reviewed

K. Shimamoto, Y. Hirose, S. Nakao, T. Fukumura, T. Hasegawa

JOURNAL OF CRYSTAL GROWTH　378　243-245　2013/09

DOI： 10.1016/j.jcrysgro.2012.12.117 　

ISSN： 0022-0248
Magnetic oxide semiconductors: On the high-temperature ferromagnetism in tio2- and ZnO-based compounds Peer-reviewed

Tomoteru Fukumura, Masashi Kawasaki

Functional Metal Oxides: New Science and Novel Applications　89-131　2013/07/31
Publisher: Wiley-VCH Verlag
DOI： 10.1002/9783527654864.ch3
Full compensation of oxygen vacancies in EuTiO3 (001) epitaxial thin film stabilized by a SrTiO3 surface protection layer Peer-reviewed

K. Shimamoto, K. Hatabayashi, Y. Hirose, S. Nakao, T. Fukumura, T. Hasegawa

APPLIED PHYSICS LETTERS　102　(4)　2013/01

DOI： 10.1063/1.4789778 　

ISSN： 0003-6951
Electronic and transport properties of Eu-substituted infinite-layer strontium ferrite thin films Peer-reviewed

Akira Chikamatsu, Toshiya Matsuyama, Tsukasa Katayama, Yasushi Hirose, Hiroshi Kumigashira, Masaharu Oshima, Tomoteru Fukumura, Tetsuya Hasegawa

Journal of Crystal Growth　378　165-167　2013

DOI： 10.1016/j.jcrysgro.2012.12.067 　

ISSN： 0022-0248
Electron carrier-mediated room temperature ferromagnetism in anatase (ti,co) o 2

Tomoteru Fukumura, Yoshinori Yamada, Kazunori Ueno, Hongtao Yuan, Hidekazu Shimotani, Yoshihiro Iwasa, L. I.N. Gu, Susumu Tsukimoto, Yuichi Ikuhara, Masashi Kawasaki

SPIN　2　(4)　2012/12/01
Publisher: World Scientific Publishing Co. Pte Ltd
DOI： 10.1142/S2010324712300058 　

ISSN： 2010-3255 2010-3247
Ultrafast optical control of magnetization in EuO thin films Peer-reviewed

T. Makino, F. Liu, T. Yamasaki, Y. Kozuka, K. Ueno, A. Tsukazaki, T. Fukumura, Y. Kong, M. Kawasaki

PHYSICAL REVIEW B　86　(6)　2012/08

DOI： 10.1103/PhysRevB.86.064403 　

ISSN： 1098-0121
Ultrafast Time-Resolved Faraday Rotation in EuO Thin Films Peer-reviewed

F. Liu, T. Makino, T. Yamasaki, K. Ueno, A. Tsukazaki, T. Fukumura, Y. Kong, M. Kawasaki

PHYSICAL REVIEW LETTERS　108　(25)　2012/06

DOI： 10.1103/PhysRevLett.108.257401 　

ISSN： 0031-9007
Ferromagnetism of cobalt-doped anatase TiO2 studied by bulk- and surface-sensitive soft x-ray magnetic circular dichroism Peer-reviewed

V. R. Singh, K. Ishigami, V. K. Verma, G. Shibata, Y. Yamazaki, T. Kataoka, A. Fujimori, F. -H. Chang, D. -J. Huang, H. -J. Lin, C. T. Chen, Y. Yamada, T. Fukumura, M. Kawasaki

APPLIED PHYSICS LETTERS　100　(24)　2012/06

DOI： 10.1063/1.4729123 　

ISSN： 0003-6951

eISSN： 1077-3118
Magnetic and dielectric properties of layered perovskite Gd2Ti2O7 thin film epitaxially stabilized on a perovskite single crystal Peer-reviewed

Takashi Ukita, Yasushi Hirose, Sawako Ohno, Kunitada Hatabayashi, Tomoteru Fukumura, Tetsuya Hasegawa

JOURNAL OF APPLIED PHYSICS　111　(7)　2012/04

DOI： 10.1063/1.3673546 　

ISSN： 0021-8979

eISSN： 1089-7550
Enhanced coercivity of half-metallic La0.7Sr0.3MnO3 by Ru substitution under in-plane uniaxial strain Peer-reviewed

K. Shigematsu, A. Chikamatsu, Y. Hirose, T. Fukumura, T. Hasegawa

JOURNAL OF APPLIED PHYSICS　111　(7)　2012/04

DOI： 10.1063/1.3672852 　

ISSN： 0021-8979

eISSN： 1089-7550
Room temperature ferromagnetism induced by electric field in cobalt-doped TiO2 Peer-reviewed

T. Fukumura, Y. Yamada, K. Ueno, H. T. Yuan, H. Shimotani, Y. Iwasa, L. Gu, S. Tsukimoto, Y. Ikuhara, M. Kawasaki

DIELECTRIC MATERIALS AND METALS FOR NANOELECTRONICS AND PHOTONICS 10　50　(4)　53-57　2012

DOI： 10.1149/05004.0053ecst 　

ISSN： 1938-5862
Control of ferromagnetism at room temperature in (Ti,Co)O2-delta via chemical doping of electron carriers Peer-reviewed

Y. Yamada, T. Fukumura, K. Ueno, M. Kawasaki

APPLIED PHYSICS LETTERS　99　(24)　2011/12

DOI： 10.1063/1.3669505 　

ISSN： 0003-6951

eISSN： 1077-3118
Electronic structure of the delafossite-type CuMO2 (M = Sc, Cr, Mn, Fe, and Co): Optical absorption measurements and first-principles calculations Peer-reviewed

Hiroki Hiraga, Takayuki Makino, Tomoteru Fukumura, Hongming Weng, Masashi Kawasaki

PHYSICAL REVIEW B　84　(4)　2011/07

DOI： 10.1103/PhysRevB.84.041411 　

ISSN： 1098-0121
Electrically Induced Ferromagnetism at Room Temperature in Cobalt-Doped Titanium Dioxide Peer-reviewed

Y. Yamada, K. Ueno, T. Fukumura, H. T. Yuan, H. Shimotani, Y. Iwasa, L. Gu, S. Tsukimoto, Y. Ikuhara, M. Kawasaki

SCIENCE　332　(6033)　1065-1067　2011/05

DOI： 10.1126/science.1202152 　

ISSN： 0036-8075
Bulk and surface magnetization of Co atoms in rutile Ti1-xCoxO2-delta thin films revealed by x-ray magnetic circular dichroism Peer-reviewed

V. R. Singh, Y. Sakamoto, T. Kataoka, M. Kobayashi, Y. Yamazaki, A. Fujimori, F-H Chang, D-J Huang, H-J Lin, C. T. Chen, H. Toyosaki, T. Fukumura, M. Kawasaki

JOURNAL OF PHYSICS-CONDENSED MATTER　23　(17)　2011/05

DOI： 10.1088/0953-8984/23/17/176001 　

ISSN： 0953-8984

eISSN： 1361-648X
Observation of anomalous Hall effect in EuO epitaxial thin films grown by a pulse laser deposition Peer-reviewed

T. Yamasaki, K. Ueno, A. Tsukazaki, T. Fukumura, M. Kawasaki

APPLIED PHYSICS LETTERS　98　(8)　2011/02

DOI： 10.1063/1.3557050 　

ISSN： 0003-6951
Combinatorial thin film synthesis and its high throughput screening for inorganic functional materials Peer-reviewed

Tetsuya Hasegawa, Tomoteru Fukumura

Journal of the Vacuum Society of Japan　54　(11)　549-558　2011

DOI： 10.3131/jvsj2.54.549 　

ISSN： 1882-2398
Carrier Doping into SrFeO2 Epitaxial Thin Films by Eu-Substitution Peer-reviewed

Toshiya Matsuyama, Akira Chikamatsu, Yasushi Hirose, Tomoteru Fukumura, Tetsuya Hasegawa

APPLIED PHYSICS EXPRESS　4　(1)　2011/01

DOI： 10.1143/APEX.4.013001 　

ISSN： 1882-0778
Ultrafast dynamics of excitons in delafossite CuScO2 thin films Peer-reviewed

Fucai Liu, T. Makino, H. Hiraga, T. Fukumura, Yongfa Kong, M. Kawasaki

APPLIED PHYSICS LETTERS　96　(21)　2010/05

DOI： 10.1063/1.3436548 　

ISSN： 0003-6951
Electronic-Field Control of Two-Dimensional Electrons in Polymer-Gated-Oxide Semiconductor Heterostructures (vol 22, pg 876, 2010) Peer-reviewed

Masaki Nakano, Atsushi Tsukazaki, Akira Ohtomo, Kazunori Ueno, Shunsuke Akasaka, Hiroyuki Yuji, Ken Nakahara, Tomoteru Fukumura, Masashi Kawasaki

ADVANCED MATERIALS　22　(14)　1553-1553　2010/04

ISSN： 0935-9648
Electronic-Field Control of Two-Dimensional Electrons in Polymer-Gated-Oxide Semiconductor Heterostructures Peer-reviewed

Masaki Nakano, Atsushi Tsukazaki, Akira Ohtomo, Kazunori Ueno, Shunsuke Akasaka, Hiroyuki Yuji, Ken Nakahara, Tomoteru Fukumura, Masashi Kawasaki

ADVANCED MATERIALS　22　(8)　876-+　2010/02

DOI： 10.1002/adma.200902162 　

ISSN： 0935-9648
Spatial distribution of two-dimensional electron gas in a ZnO/Mg0.2Zn0.8O heterostructure probed with a conducting polymer Schottky contact Peer-reviewed

M. Nakano, A. Tsukazaki, K. Ueno, R. Y. Gunji, A. Ohtomo, T. Fukumura, M. Kawasaki

APPLIED PHYSICS LETTERS　96　(5)　1-3　2010/02

DOI： 10.1063/1.3309699 　

ISSN： 0003-6951
Erratum: Electronic-field control of two-dimensional electrons in polymer-gated-oxide semiconductor heterostructures (Advanced Materials (2010) 22 (876) DOI:10.1002/adma.200902162)

Nakano, M., Tsukazaki, A., Ohtomo, A., Ueno, K., Akasaka, S., Yuji, H., Nakahara, K., Fukumura, T., Kawasaki, M.

Advanced Materials　22　(45)　5081-5081　2010

DOI： 10.1002/adma.201090150 　
Interplay between magnetic impurities and photoinduced carriers in surface depletion layer of anatase Ti1-xCoxO2-delta thin film probed by x-ray photoemission spectroscopy Peer-reviewed

N. Yamashita, T. Sudayama, T. Mizokawa, Y. Yamada, T. Fukumura, M. Kawasaki

APPLIED PHYSICS LETTERS　96　(2)　1-3　2010/01

DOI： 10.1063/1.3291680 　

ISSN： 0003-6951

eISSN： 1077-3118
High-Throughput Screening of Ultraviolet-Visible Magnetooptical Properties of Spinel Ferrite (Zn,Co)Fe2O4 Solid Solution Epitaxial Film by a Composition-Spread Approach Peer-reviewed

Yosuke Iwasaki, Tomoteru Fukumura, Hisamichi Kimura, Akira Ohkubo, Tetsuya Hasegawa, Yasushi Hirose, Takayuki Makino, Kazunori Ueno, Masashi Kawasaki

APPLIED PHYSICS EXPRESS　3　(10)　2010

DOI： 10.1143/APEX.3.103001 　

ISSN： 1882-0778
Excitonic characteristics in direct wide-band-gap CuScO2 epitaxial thin films Peer-reviewed

H. Hiraga, T. Makino, T. Fukumura, A. Ohtomo, M. Kawasaki

APPLIED PHYSICS LETTERS　95　(21)　1-3　2009/11

DOI： 10.1063/1.3268476 　

ISSN： 0003-6951
Optical and magnetic properties of CuMnO2 epitaxial thin films with a delafossite-derivative structure Peer-reviewed

HIRAGA, H., FUKUMURA, T., OHTOMO, A., MAKINO, T., OHKUBO, A., KIMURA, H., KAWASAKI, M.

APPLIED PHYSICS LETTERS　95　(3)　1-3　2009/07/22

DOI： 10.1063/1.3186790 　

ISSN： 0003-6951
Magnetic Domain Structures Governed by Granular Morphology in La0.6Sr0.4MnO3 Thin Films as Probed by Low-Temperature Magnetic Force Microscopy Peer-reviewed

Shinji Muranaka, Hidetaka Sugaya, Takashi Yamasaki, Tornoteru Fukumura, Masashi Kawasaki, Tetsuya Hasegawa

APPLIED PHYSICS EXPRESS　2　(6)　1-3　2009/06

DOI： 10.1143/APEX.2.063002 　

ISSN： 1882-0778
Vortex dynamics in a NbN film studied by terahertz spectroscopy Peer-reviewed

Y. Ikebe, R. Shimano, M. Ikeda, T. Fukumura, M. Kawasaki

Physical Review B - Condensed Matter and Materials Physics　79　(17)　1-7　2009/05/01

DOI： 10.1103/PhysRevB.79.174525 　

ISSN： 1098-0121 1550-235X
Co-doped TiO2 films grown on glass: Room-temperature ferromagnetism accompanied with anomalous Hall effect and magneto-optical effect Peer-reviewed

T. Yamasaki, T. Fukumura, Y. Yamada, M. Nakano, K. Ueno, T. Makino, M. Kawasaki

APPLIED PHYSICS LETTERS　94　(10)　1-3　2009/03

DOI： 10.1063/1.3095664 　

ISSN： 0003-6951
Crystal structure and valence distribution of [(LaMnO₃)_m(SrMnO₃)_m]_n artificial superlattices Peer-reviewed

H. Nakao, J. Nishimura, Y. Murakami, A. Ohtomo, T. Fukumura, M. Kawasaki, T. Koida, Y. Wakabayashi

J. Phys. Soc. Jpn.　78　(024602)　1-10　2009/01/26
Publisher: The Physical Society of Japan (JPS)
DOI： 10.1143/JPSJ.78.024602 　

ISSN： 0031-9015

More details Close

The crystal structure of [(LaMnO3)m(SrMnO3)m]n artificial superlattices and the valence distribution of Mn ions have been studied using the X-ray scattering technique. The stacking structures were determined by the scattering intensities in the out-of-plane direction. The Mn valence distributions were evaluated by the energy dependence of the scattering intensity near the Mn K-edge, which was analyzed on the basis of the obtained crystal structures. The result indicates that the Mn valence becomes 3+ (4+) in the LaMnO3 (SrMnO3) layers, and the valence has an intermediate value between 3+ and 4+ only at the interface between LaMnO3 and SrMnO3 layers. We have also clarified that all the films are insulators independent of the periodicity $m$.
MgxZn1-xO-Based Schottky Photodiode for Highly Color-Selective Ultraviolet Light Detection Peer-reviewed

Masaki Nakano, Takayuki Makino, Atsushi Tsukazaki, Kazunori Ueno, Akira Ohtomo, Tomoteru Fukumura, Hiroyuki Yuji, Yoshio Nishimoto, Shunsuke Akasaka, Daiju Takamizu, Ken Nakahara, Tetsuhiro Tanabe, Akira Kamisawa, Masashi Kawasaki

APPLIED PHYSICS EXPRESS　1　(12)　1-3　2008/12

DOI： 10.1143/APEX.1.121201 　

ISSN： 1882-0778
Room Temperature Ferromagnetic Semiconductor Rutile Ti1-xCoxO2-delta Epitaxial Thin Films Grown by Sputtering Method Peer-reviewed

Takashi Yamasaki, Tomoteru Fukumura, Masaki Nakano, Kazunori Ueno, Masashi Kawasaki

APPLIED PHYSICS EXPRESS　1　(11)　1-3　2008/11

DOI： 10.1143/APEX.1.111302 　

ISSN： 1882-0778
Transparent polymer Schottky contact for a high performance visible-blind ultraviolet photodiode based on ZnO Peer-reviewed

M. Nakano, T. Makino, A. Tsukazaki, K. Ueno, A. Ohtomo, T. Fukumura, H. Yuji, S. Akasaka, K. Tamura, K. Nakahara, T. Tanabe, A. Kamisawa, M. Kawasaki

APPLIED PHYSICS LETTERS　93　(12)　1-3　2008/09

DOI： 10.1063/1.2989125 　

ISSN： 0003-6951
Polymer Schottky contact on O-polar ZnO with silane coupling agent as surface protective layer Peer-reviewed

GUNJI, RY, NAKANO, M., TSUKAZAKI, A., OHTOMO, A., FUKUMURA, T., KAWASAKI, M.

APPLIED PHYSICS LETTERS　93　(1)　1-3　2008/07/09

DOI： 10.1063/1.2956419 　
Role of charge carriers for ferromagnetism in cobalt-doped rutile TiO(2) Invited Peer-reviewed

T. Fukumura, H. Toyosaki, K. Ueno, M. Nakano, M. Kawasaki

NEW JOURNAL OF PHYSICS　10　(055018)　1-13　2008/05

DOI： 10.1088/1367-2630/10/5/055018 　

ISSN： 1367-2630
Anomalous Hall effect in anatase Ti1-xCoxO2-delta above room temperature Peer-reviewed

K. Ueno, T. Fukumura, H. Toyosaki, M. Nakano, T. Yamasaki, Y. Yamada, M. Kawasaki

JOURNAL OF APPLIED PHYSICS　103　(7)　1-3　2008/04

DOI： 10.1063/1.2834247 　

ISSN： 0021-8979

eISSN： 1089-7550
High-throughput screening for combinatorial thin-film library of thermoelectric materials Peer-reviewed

Masaki Watanabe, Takuji Kita, Tornoteru Fukumura, Akira Ohtomo, Kazunori Ueno, Masashi Kawasaki

JOURNAL OF COMBINATORIAL CHEMISTRY　10　(2)　175-178　2008/03

DOI： 10.1021/cc700094a 　

ISSN： 1520-4766
Evolution of magnetic circular dichroism of pure ZnTe in magnetic field: Spectral similarity between undoped and Cr-doped ZnTe Peer-reviewed

Hongming Weng, Jinming Dong, Tomoteru Fukumura, Masashi Kawasaki, Yoshiyuki Kawazoe

PHYSICAL REVIEW B　77　(12)　1-6　2008/03

DOI： 10.1103/PhysRevB.77.125206 　

ISSN： 1098-0121
Improved performance of organic light-emitting device with anatase TiO2 anode Peer-reviewed

Masaki Nakano, Tomoteru Fukumura, Hidemi Toyosaki, Kazunori Ueno, Masashi Kawasaki

JAPANESE JOURNAL OF APPLIED PHYSICS　47　(2)　1276-1278　2008/02

DOI： 10.1143/JJAP.47.1276 　

ISSN： 0021-4922
Low-temperature growth of highly crystalline superconducting ZrN thin film on c-GaN layer by pulsed laser deposition Peer-reviewed

YaBin Zhu, Masahiro Ikeda, Yoshihiro Murakami, Atsushi Tsukazaki, Tomoteru Fukumura, Masashi Kawasaki

JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS & EXPRESS LETTERS　46　(41-44)　L1000-L1002　2007/11

DOI： 10.1143/JJAP.46.L1000 　

ISSN： 0021-4922
Combinatorial synthesis and high throughput evaluation of thermoelectric power factor in Mg-Si-Ge ternary compounds Peer-reviewed

M. Watanabe, T. Kita, T. Fukumura, A. Ohtomo, K. Ueno, M. Kawasaki

APPLIED SURFACE SCIENCE　254　(3)　777-780　2007/11

DOI： 10.1016/j.apsusc.2007.05.095 　

ISSN： 0169-4332
Low-temperature growth of highly crystalline superconducting ZrN thin film on c-GaN layer by pulsed laser deposition Peer-reviewed

YaBin Zhu, Masahiro Ikeda, Yoshihiro Murakami, Atsushi Tsukazaki, Tomoteru Fukumura, Masashi Kawasaki

JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS & EXPRESS LETTERS　46　(41-44)　L1000-L1002　2007/11

DOI： 10.1143/JJAP.46.L1000 　

ISSN： 0021-4922
Schottky contact on a ZnO (0001) single crystal with conducting polymer Peer-reviewed

M. Nakano, A. Tsukazaki, R. Y. Gunji, K. Ueno, A. Ohtomo, T. Fukumura, M. Kawasaki

APPLIED PHYSICS LETTERS　91　(14)　1-3　2007/10

DOI： 10.1063/1.2789697 　

ISSN： 0003-6951
X-ray anomalous scattering of diluted magnetic oxide semiconductors: Possible evidence of lattice deformation for high temperature ferromagnetism Peer-reviewed

Takeshi Matsumura, Daisuke Okuyama, Shinya Niioka, Hideaki Ishida, Tadashi Satoh, Youichi Murakami, Hidemi Toyosaki, Yasuhiro Yamada, Tomoteru Fukumura, Masashi Kawasaki

Physical Review B - Condensed Matter and Materials Physics　76　(11)　1-5　2007/09/18

DOI： 10.1103/PhysRevB.76.115320 　

ISSN： 1098-0121 1550-235X
A scaling relation of anomalous hall effect in ferromagnetic semiconductors and metals Peer-reviewed

Tomoteru Fukumura, Hidemi Toyosaki, Kazunori Ueno, Masaki Nakano, Takashi Yamasaki, Masashi Kawasaki

JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS & EXPRESS LETTERS　46　(25-28)　L642-L644　2007/07

DOI： 10.1143/JJAP.46.L642 　

ISSN： 0021-4922
Anomalous Hall effect in anatase Ti1-xCoxO2-delta at low temperature regime Peer-reviewed

K. Ueno, T. Fukumura, H. Toyosaki, M. Nakano, M. Kawasaki

APPLIED PHYSICS LETTERS　90　(7)　1-3　2007/02

DOI： 10.1063/1.2535777 　

ISSN： 0003-6951
An organic light emitting device employing transparent rutile TiO2 as an anode Peer-reviewed

Masaki Nakano, Tomoteru Fukumura, Hidemi Toyosaki, Kazunori Ueno, Masashi Kawasaki

JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS & EXPRESS LETTERS　45　(37-41)　L1061-L1063　2006/10

DOI： 10.1.143/JJAP.45.L1061 　

ISSN： 0021-4922
An organic light emitting device employing transparent rutile TiO2 as an anode Peer-reviewed

Masaki Nakano, Tomoteru Fukumura, Hidemi Toyosaki, Kazunori Ueno, Masashi Kawasaki

JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS & EXPRESS LETTERS　45　(37-41)　L1061-L1063　2006/10

ISSN： 0021-4922
Magnetic circular dichroism spectra in a II-VI diluted magnetic semiconductor Zn1-xCrxTe: First-principles calculations Peer-reviewed

Hongming Weng, Jinming Dong, Tomoteru Fukumura, Masashi Kawasaki, Yoshiyuki Kawazoe

PHYSICAL REVIEW B　74　(11)　1-4　2006/09

DOI： 10.1103/PhysRevB.74.115201 　

ISSN： 1098-0121
Indication of intrinsic room-temperature ferromagnetism in Ti1-xCoxO2-delta thin film: An x-ray magnetic circular dichroism study Peer-reviewed

K. Mamiya, T. Koide, A. Fujimori, H. Tokano, H. Manaka, A. Tanaka, H. Toyosaki, T. Fukumura, M. Kawasaki

APPLIED PHYSICS LETTERS　89　(6)　1-3　2006/08

DOI： 10.1063/1.2236829 　

ISSN： 0003-6951

eISSN： 1077-3118
Ti1-xCoxO2-delta/AlOx/Fe0.1Co0.9 magnetic tunnel junctions with varied AlOx thickness Peer-reviewed

H Toyosaki, T Fukumura, K Ueno, M Nakano, M Kawasaki

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

DOI： 10.1063/1.2163829 　

ISSN： 0021-8979
Electronic and magnetic properties of double-impurities-doped TiO2 (rutile): First-principles calculations Peer-reviewed

Murugan, P, Belosludov, RV, Mizuseki, H, Nishimatsu, T, Fukumura, T, Kawasaki, M, Kawazoe, Y

J. Appl. Phys.　99　(08M105)　1-3　2006/04
Publisher: American Institute of Physics
DOI： 10.1063/1.2165108 　

ISSN： 0021-8979
Magnetoresistance of n-type ZnO:Al and Zn 1-xMn xO:Al thin films Peer-reviewed

T. Andrearczyk, J. Jaroszyński, G. Grabecki, T. Dietl, T. Fukumura, M. Kawasaki

Physica Status Solidi C: Conferences　3　(4)　1030-1033　2006

DOI： 10.1002/pssc.200564751 　

ISSN： 1610-1634
Spin-related magnetoresistance of n-type ZnO : Al and Zn1-xMnxO : Al thin films Peer-reviewed

T. Andrearczyk, J. Jaroszynski, G. Grabecki, T. Dietl, T. Fukumura, M. Kawasaki

LOW TEMPERATURE PHYSICS, PTS A AND B　850　1498-+　2006

DOI： 10.1063/1.2355271 　

ISSN： 0094-243X
Development of variable temperature scanning microwave microscope for high throughput materials characterization Peer-reviewed

Noriaki Okazaki, Sohei Okazaki, Ryota Takahashi, Makoto Murakami, Parhat Ahmet, Nobuyuki Kakiuchi, Hiroshi Furusho, Taito Nishino, Yutaka Furubayashi, Tomoteru Fukumura, Yuji Mastumoto, Masashi Kawasaki, Toyohiro Chikyow, Hideomi Koinuma, Tetsuya Hasegawa

COMBINATORIAL METHODS AND INFORMATICS IN MATERIALS SCIENCE　894　55-+　2006

ISSN： 0272-9172
Alignment of liquid crystalline polyfluorene films by an optically aligned polymer layer Peer-reviewed

T Fukumura, C Soci, D Moses, AJ Heeger, WM Gibbons, MGP Reppy

JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS & EXPRESS LETTERS　45　(1-3)　L33-L35　2006/01

DOI： 10.1143/JJAP.45.L33 　

ISSN： 0021-4922
Signature of carrier-induced ferromagnetism in Ti1-xCoxO2-delta: Exchange interaction between high-spin Co2+ and the Ti 3d conduction band Peer-reviewed

JW Quilty, A Shibata, JY Son, K Takubo, T Mizokawa, H Toyosaki, T Fukumura, M Kawasaki

PHYSICAL REVIEW LETTERS　96　(2)　1-4　2006/01

DOI： 10.1103/PhysRevLett.96.027202 　

ISSN： 0031-9007

eISSN： 1079-7114
First principles investigation of the magnetic circular dichroism spectra of Co-doped anatase and rutile TiO2 Peer-reviewed

Hongming Weng, Jinming Dong, T. Fukumura, M. Kawasaki, Y. Kawazoe

Physical Review B - Condensed Matter and Materials Physics　73　(12)　1-4　2006

DOI： 10.1103/PhysRevB.73.121201 　

ISSN： 1098-0121 1550-235X
Magnetoresistance of n-type ZnO : Al and Zn1xMnxO COL & CHEM;Al thin films Peer-reviewed

T Andrearczyk, J Jaroszynski, G Grabecki, T Dietl, T Fukumura, M Kawasaki

PHYSICA STATUS SOLIDI C - CURRENT TOPICS IN SOLID STATE PHYSICS, VOL 3, NO 4　3　(4)　1030-+　2006

DOI： 10.1002/pssc.200564751 　

ISSN： 1862-6351
Spin-related magnetoresistance of n-type ZnO:Al and Zn1-xMnxO:Al thin films Peer-reviewed

T. Andrearczyk, J. Jaroszyński, G. Grabecki, T. Dietl, T. Fukumura, M. Kawasaki

Physical Review B - Condensed Matter and Materials Physics　72　(12)　1-4　2005/09/15

DOI： 10.1103/PhysRevB.72.121309 　

ISSN： 1098-0121 1550-235X
Evolution of ferromagnetic circular dichroism coincident with magnetization and anomalous Hall effect in Co-doped rutile TiO2 Peer-reviewed

H Toyosaki, T Fukumura, Y Yamada, M Kawasaki

APPLIED PHYSICS LETTERS　86　(18)　1-3　2005/05

DOI： 10.1063/1.1922569 　

ISSN： 0003-6951
Magnetic oxide semiconductors Invited Peer-reviewed

T Fukumura, H Toyosaki, Y Yamada

SEMICONDUCTOR SCIENCE AND TECHNOLOGY　20　(4)　S103-S111　2005/04

DOI： 10.1088/0268-1242/20/4/012 　

ISSN： 0268-1242

eISSN： 1361-6641
Fabrication of ternary phase composition-spread thin film libraries and their high-throughput characterization: Ti1-x-yZrxHfyO2 for bandgap engineering Invited Peer-reviewed

Y Yamada, T Fukumura, M Ikeda, M Ohtani, H Toyosaki, A Ohtomo, F Matsukura, H Ohno, M Kawasaki

JOURNAL OF SUPERCONDUCTIVITY　18　(1)　109-113　2005/02

DOI： 10.1007/s10948-005-2160-x 　

ISSN： 0896-1107
Fluorescence EXAFS study on local structures around Mn and Fe atoms doped in ZnO Peer-reviewed

H. Ofuchi, Z. W. Jin, T. Fukumura, M. Kawasaki, Y. Matsumoto, T. Hasegawa, H. Fujioka, M. Oshima, H. Koinuma

Physica Scripta T　T115　614-615　2005

DOI： 10.1238/Physica.Topical.115a00614 　

ISSN： 0281-1847
Fabrication of ternary phase composition-spread thin film libraries and their high-throughput characterization: Ti1-x-yZrxHf yO2 for bandgap engineering Peer-reviewed

Y. Yamada, T. Fukumura, M. Ikeda, M. Ohtani, H. Toyosaki, A. Ohtomo, F. Matsukura, H. Ohno, M. Kawasaki

Journal of Superconductivity and Novel Magnetism　18　(1)　109-113　2005

DOI： 10.1007/s10948-005-2160-x 　

ISSN： 1557-1939 1557-1947
TiO2(rutile) doped with double impurities for fabricating spintronic devices - a combinatorial computational approach Peer-reviewed

P Murugan, RV Belosludov, H Mizuseki, T Nishimatsu, T Fukumura, M Kawasaki, Y Kawazoe

MEASUREMENT SCIENCE AND TECHNOLOGY　16　(1)　242-247　2005/01

DOI： 10.1088/0957-0233/16/1/032 　

ISSN： 0957-0233

eISSN： 1361-6501
Fluorescence EXAFS study on local structures around Mn and Fe atoms doped in ZnO Peer-reviewed

H. Ofuchi, Z. W. Jin, T. Fukumura, M. Kawasaki, Y. Matsumoto, T. Hasegawa, H. Fujioka, M. Oshima, H. Koinuma

PHYSICA SCRIPTA　T115　614-615　2005

DOI： 10.1238/Physica.Topical.115a00614 　

ISSN： 0031-8949

eISSN： 1402-4896
A ferromagnetic oxide semiconductor as spin injection electrode in magnetic tunnel junction Peer-reviewed

H Toyosaki, T Fukumura, K Ueno, M Nakano, M Kawasaki

JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS & EXPRESS LETTERS　44　(28-32)　L896-L898　2005

DOI： 10.1143/JJAP.44.L896 　

ISSN： 0021-4922
Fluorescence EXAFS study on local structures around Mn and Fe atoms doped in ZnO Peer-reviewed

H. Ofuchi, Z. W. Jin, T. Fukumura, M. Kawasaki, Y. Matsumoto, T. Hasegawa, H. Fujioka, M. Oshima, H. Koinuma

PHYSICA SCRIPTA　T115　614-615　2005

DOI： 10.1238/Physica.Topical.115a00614 　

ISSN： 0031-8949

eISSN： 1402-4896
A ferromagnetic oxide semiconductor as spin injection electrode in magnetic tunnel junction Peer-reviewed

H Toyosaki, T Fukumura, K Ueno, M Nakano, M Kawasaki

JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS & EXPRESS LETTERS　44　(28-32)　L896-L898　2005

DOI： 10.1143/JJAP.44.L896 　

ISSN： 0021-4922
Epitaxial growth and physical properties of a room temperature ferromagnetic semiconductor: Anatase phase Ti1-xCoxO2 Peer-reviewed

Y Yamada, H Toyosaki, A Tsukazaki, T Fukumura, K Tamura, Y Segawa, K Nakajima, T Aoyama, T Chikyow, T Hasegawa, H Koinuma, M Kawasaki

JOURNAL OF APPLIED PHYSICS　96　(9)　5097-5102　2004/11

DOI： 10.1063/1.1758310 　

ISSN： 0021-8979

eISSN： 1089-7550
Observation of compositional fluctuation by scanning superconducting quantum interference device (SQUID) microscope in superconducting La1.8Sr0.2CuO4 Peer-reviewed

J Kasai, N Okazaki, T Hasegawa, Y Togawa, T Sasagawa, JI Shimoyama, K Kishio, M Ohtani, T Fukumura, M Kawasaki, H Koinuma

JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS & EXPRESS LETTERS　43　(10B)　L1327-L1329　2004/10

DOI： 10.1143/JJAP.43.L1327 　

ISSN： 0021-4922
X-ray absorption spectroscopy of transition-metal doped diluted magnetic semiconductors Zn(1-)x(M)xO Peer-reviewed

J Okabayashi, K Ono, M Mizuguchi, M Oshima, SS Gupta, DD Sarma, T Mizokawa, A Fujimori, M Yuri, CT Chen, T Fukumura, M Kawasaki, H Koinuma

JOURNAL OF APPLIED PHYSICS　95　(7)　3573-3575　2004/04

DOI： 10.1063/1.1652248 　

ISSN： 0021-8979
Anomalous Hall effect governed by electron doping in a room-temperature transparent ferromagnetic semiconductor Peer-reviewed

H Toyosaki, T Fukumura, Y Yamada, K Nakajima, T Chikyow, T Hasegawa, H Koinuma, M Kawasaki

NATURE MATERIALS　3　(4)　221-224　2004/04

DOI： 10.1038/nmat1099 　

ISSN： 1476-1122

eISSN： 1476-4660
Modeling of grain boundary barrier modulation in ZnO invisible thin film transistors Peer-reviewed

FM Hossain, J Nishii, S Takagi, T Sugihara, A Ohtomo, T Fukumura, H Koinuma, H Ohno, M Kawasaki

PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES　21　(2-4)　911-915　2004/03

DOI： 10.1016/j.physe.2003.11.149 　

ISSN： 1386-9477
Exploration of oxide-based diluted magnetic semiconductors toward transparent spintronics Peer-reviewed

T Fukumura, Y Yamada, H Toyosaki, T Hasegawa, H Koinuma, M Kawasaki

APPLIED SURFACE SCIENCE　223　(1-3)　62-67　2004/02

DOI： 10.1016/S0169-4332(03)00898-5 　

ISSN： 0169-4332

eISSN： 1873-5584
Photo-induced magnetism in perovskite-type Mn oxides investigated by using combinatorial methodology Peer-reviewed

H Sugaya, S Okazaki, T Hasegawa, N Okazaki, J Nishimura, T Fukumura, M Kawasaki, H Koinuma

APPLIED SURFACE SCIENCE　223　(1-3)　68-72　2004/02

DOI： 10.1016/S0169-4332(03)00922-X 　

ISSN： 0169-4332
Characterization of LiNb1-xTaxO3 composition-spread thin film by the scanning microwave microscope Peer-reviewed

N Okazaki, S Okazaki, H Higuma, S Miyashita, Y Cho, J Nishimura, T Fukumura, M Kawasaki, M Murakami, Y Yamamoto, Y Matsumoto, H Koinuma, T Hasegawa

APPLIED SURFACE SCIENCE　223　(1-3)　196-199　2004/02

DOI： 10.1016/S0169-4332(03)00916-4 　

ISSN： 0169-4332
High-throughput characterization of linear and nonlinear optical properties in composition-spread (Sr,Ca)(2)CuO3 thin-films Peer-reviewed

M Ohtani, T Makino, K Yamamoto, Y Segawa, T Fukumura, H Sakurada, J Nishimura, H Koinuma, M Kawasaki

APPLIED SURFACE SCIENCE　223　(1-3)　133-137　2004/02

DOI： 10.1016/S0169-4332(03)00915-2 　

ISSN： 0169-4332
The development of scanning microwave microscope for high-throughput characterization of dielectric and conducting materials at low temperatures Peer-reviewed

S Okazaki, N Okazaki, H Sugaya, Zhao, X, K Hasegawa, P Ahmet, T Chikyow, J Nishimura, T Fukumura, M Kawasaki, M Murakami, Y Mastumoto, H Koinuma, T Hasegawa

COMBINATORIAL AND ARTIFICIAL INTELLIGENCE METHODS IN MATERIALS SCIENCE II　804　249-254　2004

ISSN： 0272-9172
Modeling and simulation of polycrystalline ZnO thin-film transistors Peer-reviewed

FM Hossain, J Nishii, S Takagi, A Ohtomo, T Fukumura, H Fujioka, H Ohno, H Koinuma, M Kawasaki

JOURNAL OF APPLIED PHYSICS　94　(12)　7768-7777　2003/12

DOI： 10.1063/1.1628834 　

ISSN： 0021-8979
Synthesis and characterization of composition-spread (Sr,Ca)(2)CuO3 thin films with high third-order optical nonlinearity Peer-reviewed

M Ohtani, T Fukumura, H Sakurada, J Nishimura, M Kawasaki, T Makino, K Yamamoto, Y Segawa

APPLIED PHYSICS LETTERS　83　(5)　842-844　2003/08

DOI： 10.1063/1.1597411 　

ISSN： 0003-6951
Discovery and optimization of new ZnO-based phospnors using a combinatorial method Peer-reviewed

VZ Mordkovich, H Hayashi, M Haemori, T Fukumura, M Kawasaki

ADVANCED FUNCTIONAL MATERIALS　13　(7)　519-524　2003/07

DOI： 10.1002/adfm.200304335 　

ISSN： 1616-301X
Fabrication of MgB2 thin film on boride substrates by pulsed laser deposition Peer-reviewed

Y Hikita, T Fukumura, T Ito, M Kawasaki, H Takagi

JOURNAL OF LOW TEMPERATURE PHYSICS　131　(5-6)　1187-1191　2003/06

DOI： 10.1023/A:1023481900617 　

ISSN： 0022-2291
Fabrication of MgB2 thin film on boride substrates by pulsed laser deposition Peer-reviewed

Y Hikita, T Fukumura, T Ito, M Kawasaki, H Takagi

JOURNAL OF LOW TEMPERATURE PHYSICS　131　(5-6)　1187-1191　2003/06

ISSN： 0022-2291
Scanning SQUID microscopy on composition-spread NdSrMnO films under irradiation Peer-reviewed

H Sugaya, TY Kim, J Nishimura, T Fukumura, M Kawasaki, H Koinuma, Y Tokura, T Hasegawa

PHYSICA B-CONDENSED MATTER　329　787-788　2003/05

DOI： 10.1016/S0921-4526(02)02548-6 　

ISSN： 0921-4526
Magnetic domain structure of growth temperature-gradient Sm2Mo2O7 thin film investigated by scanning SQUID microscopy Peer-reviewed

TY Kim, J Nishimura, T Fukumura, M Kawasaki, T Hasegawa, H Koinuma, Y Taguchi, Y Tokura

PHYSICA B-CONDENSED MATTER　329　1046-1048　2003/05

DOI： 10.1016/S0921-4526(02)02314-1 　

ISSN： 0921-4526
High mobility thin film transistors with transparent ZnO channels Peer-reviewed

J Nishii, FM Hossain, S Takagi, T Aita, K Saikusa, Y Ohmaki, Ohkubo, I, S Kishimoto, A Ohtomo, T Fukumura, F Matsukura, Y Ohno, H Koinuma, H Ohno, M Kawasaki

JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS　42　(4A)　L347-L349　2003/04

DOI： 10.1143/JJAP.42.L347 　

ISSN： 0021-4922
Fabrication of spin-frustrated Sm2Mo2O7 epitaxial films: High throughput optimization using a temperature gradient method Peer-reviewed

J Nishimura, T Fukumura, M Ohtani, Y Taguchi, M Kawasaki, Ohkubo, I, H Koinuma, H Ohguchi, K Ono, M Oshima, Y Tokura

APPLIED PHYSICS LETTERS　82　(10)　1571-1573　2003/03

DOI： 10.1063/1.1559440 　

ISSN： 0003-6951
Experimental investigation of ferromagnetism in II-VI disordered semiconducting compounds Peer-reviewed

M Sawicki, L van Khoi, F Matsukura, T Dietl, T Fukumura, Z Jin, H Koinuma, M Kawasaki

JOURNAL OF SUPERCONDUCTIVITY　16　(1)　147-150　2003/02

ISSN： 0896-1107
Magneto-optical spectroscopy of anatase TiO2 doped with Co Peer-reviewed

T Fukumura, Y Yamada, K Tamura, K Nakajima, T Aoyama, A Tsukazaki, M Sumiya, S Fuke, Y Segawa, T Chikyow, T Hasegawa, H Koinuma, M Kawasaki

JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS　42　(2A)　L105-L107　2003/02

DOI： 10.1143/JJAP.42.L105 　

ISSN： 0021-4922
Magneto-optical spectroscopy of anatase TiO2 doped with Co Peer-reviewed

T Fukumura, Y Yamada, K Tamura, K Nakajima, T Aoyama, A Tsukazaki, M Sumiya, S Fuke, Y Segawa, T Chikyow, T Hasegawa, H Koinuma, M Kawasaki

JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS　42　(2A)　L105-L107　2003/02

DOI： 10.1143/JJAP.42.L105 　

ISSN： 0021-4922
Experimental investigation of ferromagnetism in II-VI disordered semiconducting compounds

M. Sawicki, L. Van Khoi, F. Matsukura, T. Dietl, T. Fukumura, Z. Jin, H. Koinuma, M. Kawasaki

Journal of Superconductivity and Novel Magnetism　16　(1)　147-150　2003

ISSN： 1557-1939 1557-1947
S doping in ZnO film by supplying ZnS species with pulsed-laser-deposition method Peer-reviewed

YZ Yoo, ZW Jin, T Chikyow, T Fukumura, M Kawasaki, H Koinuma

APPLIED PHYSICS LETTERS　81　(20)　3798-3800　2002/11

DOI： 10.1063/1.1521577 　

ISSN： 0003-6951
Heteroepitaxial growth of beta-LiGaO2 thin films on ZnO Peer-reviewed

Ohkubo, I, C Hirose, K Tamura, J Nishii, H Saito, H Koinuma, P Ahemt, T Chikyow, T Ishii, S Miyazawa, Y Segawa, T Fukumura, M Kawasaki

JOURNAL OF APPLIED PHYSICS　92　(9)　5587-5589　2002/11

DOI： 10.1063/1.1512311 　

ISSN： 0021-8979

eISSN： 1089-7550
Effect of A-site cation ordering on the magnetoelectric properties in [(LaMnO<inf>3</inf>)<inf>m</inf>/(SrMnO<inf>3</inf>)<inf>m</inf>]<inf>n</inf> artificial superlattices

T. Koida, M. Lippmaa, T. Fukumura, K. Itaka, Y. Matsumoto, M. Kawasaki, H. Koinuma

Physical Review B - Condensed Matter and Materials Physics　66　(14)　1444181-1444186　2002/10/01

ISSN： 0163-1829
Effect of A-site cation ordering on the magnetoelectric properties in [(LaMnO3)(m)/(SrMnO3)(m)](n) artificial superlattices Peer-reviewed

T Koida, M Lippmaa, T Fukumura, K Itaka, Y Matsumoto, M Kawasaki, H Koinuma

PHYSICAL REVIEW B　66　(14)　Art. No. 144418　2002/10

DOI： 10.1103/PhysRevB.66.144418 　

ISSN： 1098-0121
Effect of A-site cation ordering on the magnetoelectric properties in [(LaMnO3)(m)/(SrMnO3)(m)](n) artificial superlattices Peer-reviewed

T Koida, M Lippmaa, T Fukumura, K Itaka, Y Matsumoto, M Kawasaki, H Koinuma

PHYSICAL REVIEW B　66　(14)　2002/10

DOI： 10.1103/PhysRevB.66.144418 　

ISSN： 1098-0121
Systematic examination of carrier polarity in composition spread ZnO thin films codoped with Ga and N Peer-reviewed

A Tsukazaki, H Saito, K Tamura, M Ohtani, H Koinuma, M Sumiya, S Fuke, T Fukumura, M Kawasaki

APPLIED PHYSICS LETTERS　81　(2)　235-237　2002/07

DOI： 10.1063/1.1491294 　

ISSN： 0003-6951

eISSN： 1077-3118
Fabrication and characterization of thin-film phosphor combinatorial libraries Peer-reviewed

VZ Mordkovich, ZW Jin, Y Yamada, T Fukumura, M Kawasaki, H Koinuma

SOLID STATE SCIENCES　4　(6)　779-782　2002/06

DOI： 10.1016/S1293-2558(02)01292-X 　

ISSN： 1293-2558
A composition-spread approach to investigate band-filling dependence on magnetic and electronic phases for Perovskite manganite Peer-reviewed

T Fukumura, Y Okimoto, A Ohtani, T Kageyama, T Koida, M Kawasaki, T Hasegawa, Y Tokura, H Koinuma

APPLIED SURFACE SCIENCE　189　(3-4)　339-343　2002/04

DOI： 10.1016/S0169-4332(01)01023-6 　

ISSN： 0169-4332
High-throughput characterization of composition-spread manganese oxide films with a scanning SQUID microscope Peer-reviewed

T Hasegawa, T Kageyama, T Fukumura, N Okazaki, M Kawasaki, H Koinuma, YK Yoo, F Duewer, XD Xiang

APPLIED SURFACE SCIENCE　189　(3-4)　210-215　2002/04

DOI： 10.1016/S0169-4332(01)01011-X 　

ISSN： 0169-4332
Development of scanning microwave microscope with a lumped-constant resonator probe for high-throughput characterization of combinatorial dielectric materials Peer-reviewed

N Okazaki, H Odagawa, Y Cho, T Nagamura, D Komiyama, T Koida, H Minami, P Ahmet, T Fukumura, Y Matsumoto, M Kawasaki, T Chikyow, H Koinuma, T Hasegawa

APPLIED SURFACE SCIENCE　189　(3-4)　222-226　2002/04

DOI： 10.1016/S0169-4332(01)01013-3 　

ISSN： 0169-4332
Structural control and combinatorial doping of titanium dioxide thin films by laser molecular beam epitaxy Peer-reviewed

Y Matsumoto, A Murakami, T Hasegawa, T Fukumura, M Kawasaki, P Ahmet, K Nakajima, T Chikyow, H Koinuma

APPLIED SURFACE SCIENCE　189　(3-4)　344-348　2002/04

DOI： 10.1016/S0169-4332(01)01025-X 　

ISSN： 0169-4332
Optical and electrical properties of Co-doped epitaxial ZnO films Peer-reviewed

ZW Jin, T Fukumura, K Hasegawa, YZ Yoo, K Ando, T Sekiguchi, P Ahmet, T Chikyow, T Hasegawa, H Koinuma, M Kawasaki

JOURNAL OF CRYSTAL GROWTH　237　548-552　2002/04

DOI： 10.1016/S0022-0248(01)01976-5 　

ISSN： 0022-0248
Concurrent evaluation of strain in heteroepitaxial thin films with continuous lattice mismatch spread Peer-reviewed

M Ohtani, T Fukumura, M Kawasaki, K Omote, T Kikuchi, J Harada, H Koinuma

APPLIED PHYSICS LETTERS　80　(12)　2066-2068　2002/03

DOI： 10.1063/1.1462871 　

ISSN： 0003-6951
Electronic structure of the oxide-diluted magnetic semiconductor Zn1-χMnχO

T. Mizokawa, T. Nambu, A. Fujimori, T. Fukumura, M. Kawasaki

Physical Review B - Condensed Matter and Materials Physics　65　(8)　852091-852095　2002/02/15

ISSN： 0163-1829
Electronic structure of the oxide-diluted magnetic semiconductor Zn1-xMnxO Peer-reviewed

T Mizokawa, T Nambu, A Fujimori, T Fukumura, M Kawasaki

PHYSICAL REVIEW B　65　(8)　Art. No. 085209　2002/02

DOI： 10.1103/PhysRevB.65.085209 　

ISSN： 2469-9950

eISSN： 2469-9969
Effect of A-site cation ordering on the magnetoelectric properties in (formula presented) artificial superlattices Peer-reviewed

T. Koida, M. Lippmaa, T. Fukumura, K. Itaka, Y. Matsumoto, M. Kawasaki, H. Koinuma

Physical Review B - Condensed Matter and Materials Physics　66　(14)　1-6　2002

DOI： 10.1103/PhysRevB.66.144418 　

ISSN： 1550-235X 1098-0121

eISSN： 1550-235X
25aYH-7 Direct observations of vortex states in overdoped (La_<1-xr>Sr_x)_2CuO_4 single crystals by scanning SQUID microscopy Peer-reviewed

Kasai J., Hasegawa T., Okazaki N., Togawa Y., Shimoyama J., Kishio K., Ohtani M., Fukumura T., Kawasaki M., Koinuma H.

Meeting Abstracts of the Physical Society of Japan　57　(0)　545-545　2002
Publisher: The Physical Society of Japan
DOI： 10.11316/jpsgaiyo.57.1.3.0_545_2 　

ISSN： 1342-8349
Anomaly of thermal properties in thin films of La1-xSrxCoO3 series fabricated as thermoelectric materials Peer-reviewed

Y Takata, H Haneda, Y Adachi, Y Wada, T Mitsuhashi, M Ohtani, T Fukumura, M Kawasaki, H Koinuma

MATERIALS FOR ENERGY STORAGE, GENERATION AND TRANSPORT　730　221-226　2002

ISSN： 0272-9172
Development of scanning microwave microscope for high-throughput characterization of combinatorial dielectric thin film Peer-reviewed

N Okazaki, P Ahmet, T Chikyow, H Odagawa, YS Cho, T Fukumura, M Kawasaki, M Ohtani, H Koinuma, T Hasegawa

COMBINATORIAL AND ARTIFICIAL INTELLIGENCE METHODS IN MATERIALS SCIENCE　700　119-124　2002

ISSN： 0272-9172
High throughput characterization of magnetic semiconductor thin films with a scanning SQUID microscope Peer-reviewed

XJ Fan, M Murakami, R Takahasi, T Koida, Y Matsumoto, T Hasegawa, T Fukumura, M Kawasaki, P Ahmet, T Chikyow, H Koinuma

COMBINATORIAL AND ARTIFICIAL INTELLIGENCE METHODS IN MATERIALS SCIENCE　700　55-60　2002

ISSN： 0272-9172
Rutile-type oxide-diluted magnetic semiconductor: Mn-doped SnO2 Peer-reviewed

H Kimura, T Fukumura, M Kawasaki, K Inaba, T Hasegawa, H Koinuma

APPLIED PHYSICS LETTERS　80　(1)　94-96　2002/01

DOI： 10.1063/1.1430856 　

ISSN： 0003-6951

eISSN： 1077-3118
High throughput x-ray diffractometer for combinatorial epitaxial thin films Peer-reviewed

M Ohtani, T Fukumura, A Ohtomo, T Kikuchi, K Omote, H Koinuma, M Kawasaki

COMBINATORIAL AND ARTIFICIAL INTELLIGENCE METHODS IN MATERIALS SCIENCE　700　125-130　2002

ISSN： 0272-9172
Combinatorial search for transparent oxide diluted magnetic semiconductors Peer-reviewed

T Fukumura, M Kawasaki

COMBINATORIAL AND ARTIFICIAL INTELLIGENCE METHODS IN MATERIALS SCIENCE　700　45-54　2002

ISSN： 0272-9172
Anomaly of thermal properties in thin films of La1-xSrxCoO3 series synthesized with a combinatorial processing Peer-reviewed

Y Takata, Y Adachi, H Haneda, Y Wada, T Mitsuhashi, M Ohtani, T Fukumura, M Kawasaki, H Koinuma

COMBINATORIAL AND ARTIFICIAL INTELLIGENCE METHODS IN MATERIALS SCIENCE　700　167-172　2002

ISSN： 0272-9172
Observation of magnetic domain structure with scanning probe microscopes

T. Fukumura, T. Hasegawa

Surface Science　23　(4)　233-238　2002
Rutile-type oxide-diluted magnetic semiconductor: Mn-doped SnO2 Peer-reviewed

H Kimura, T Fukumura, M Kawasaki, K Inaba, T Hasegawa, H Koinuma

APPLIED PHYSICS LETTERS　80　(1)　94-96　2002/01

ISSN： 0003-6951

eISSN： 1077-3118
Electronic structure of the oxide-diluted magnetic semiconductor (formula presented) Peer-reviewed

T. Mizokawa, T. Nambu, A. Fujimori, T. Fukumura, M. Kawasaki

Physical Review B - Condensed Matter and Materials Physics　65　(8)　1-5　2002

DOI： 10.1103/PhysRevB.65.085209 　

ISSN： 1550-235X 1098-0121
Anomaly of thermal properties in thin films of La1-xSrxCoO3 series synthesized with a combinatorial processing Peer-reviewed

Y Takata, Y Adachi, H Haneda, Y Wada, T Mitsuhashi, M Ohtani, T Fukumura, M Kawasaki, H Koinuma

COMBINATORIAL AND ARTIFICIAL INTELLIGENCE METHODS IN MATERIALS SCIENCE　700　167-172　2002

ISSN： 0272-9172
Direct observations of vortices in Bi2212 single crystals by scanning SQUID microscopy Peer-reviewed

Zhao, X, J Kasai, N Okazaki, Y Nakayama, Y Togawa, J Shimoyama, K Kishio, K Kitazawa, T Fukumura, M Kawasaki, H Koinuma, T Hasegawa

SUPERCONDUCTOR SCIENCE & TECHNOLOGY　14　(12)　1124-1127　2001/12

DOI： 10.1088/0953-2048/14/12/330 　

ISSN： 0953-2048
Ferromagnetism in co-doped TiO2 rutile thin films grown by laser molecular beam epitaxy Peer-reviewed

Y Matsumoto, R Takahashi, M Murakami, T Koida, XJ Fan, T Hasegawa, T Fukumura, M Kawasaki, SY Koshihara, H Koinuma

JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS　40　(11B)　L1204-L1206　2001/11

DOI： 10.1143/JJAP.40.L1204 　

ISSN： 0021-4922
Concurrent x-ray diffractometer for high throughput structural diagnosis of epitaxial thin films Peer-reviewed

M Ohtani, T Fukumura, M Kawasaki, K Omote, T Kikuchi, J Harada, A Ohtomo, M Lippmaa, T Ohnishi, D Komiyama, R Takahashi, Y Matsumoto, H Koinuma

APPLIED PHYSICS LETTERS　79　(22)　3594-3596　2001/11

DOI： 10.1063/1.1415402 　

ISSN： 0003-6951
ZnO-CoO solid solution thin films Peer-reviewed

YZ Yoo, T Fukumura, ZW Jin, K Hasegawa, M Kawasaki, P Ahmet, T Chikyow, H Koinuma

JOURNAL OF APPLIED PHYSICS　90　(8)　4246-4250　2001/10

DOI： 10.1063/1.1402142 　

ISSN： 0021-8979
Orientation-control led epitaxy of A(2)CuO(3) (A : Sr, Ca) films with large optical nonlinearity Peer-reviewed

T Manako, Y Okimoto, M Izumi, S Shinomori, M Kawasaki, H Kishida, H Okamoto, T Fukumura, M Ohtani, Y Tokura

APPLIED PHYSICS LETTERS　79　(12)　1754-1756　2001/09

DOI： 10.1063/1.1402161 　

ISSN： 0003-6951

eISSN： 1077-3118
Orientation-control led epitaxy of A(2)CuO(3) (A : Sr, Ca) films with large optical nonlinearity Peer-reviewed

T Manako, Y Okimoto, M Izumi, S Shinomori, M Kawasaki, H Kishida, H Okamoto, T Fukumura, M Ohtani, Y Tokura

APPLIED PHYSICS LETTERS　79　(12)　1754-1756　2001/09

ISSN： 0003-6951

eISSN： 1077-3118
Magneto-optical properties of ZnO-based diluted magnetic semiconductors Peer-reviewed

K Ando, H Saito, ZW Jin, T Fukumura, M Kawasaki, Y Matsumoto, H Koinuma

JOURNAL OF APPLIED PHYSICS　89　(11)　7284-7286　2001/06

DOI： 10.1063/1.1356035 　

ISSN： 0021-8979
High throughput fabrication of transition-metal-doped epitaxial ZnO thin films: A series of oxide-diluted magnetic semiconductors and their properties Peer-reviewed

ZW Jin, T Fukumura, M Kawasaki, K Ando, H Saito, T Sekiguchi, YZ Yoo, M Murakami, Y Matsumoto, T Hasegawa, H Koinuma

APPLIED PHYSICS LETTERS　78　(24)　3824-3826　2001/06

DOI： 10.1063/1.1377856 　

ISSN： 0003-6951
Strong correlation between high-temperature electronic and low-temperature magnetic ordering in Lal(1-x)Ca(x)MnO(3) continuous phase Peer-reviewed

YK Yoo, F Duewer, T Fukumura, HT Yang, D Yi, S Liu, HY Chang, T Hasegawa, M Kawasaki, H Koinuma, Xiang, X

PHYSICAL REVIEW B　63　(22)　224421-1-224421-5　2001/06

DOI： 10.1103/PhysRevB.63.224421 　

ISSN： 1098-0121

eISSN： 1550-235X
Magnetoresistance of 3d transition-metal-doped epitaxial ZnO thin films Peer-reviewed

ZW Jin, K Hasegawa, T Fukumura, YZ Yoo, T Hasegawa, H Koinuma, M Kawasaki

PHYSICA E　10　(1-3)　256-259　2001/05

DOI： 10.1016/S1386-9477(01)00094-7 　

ISSN： 1386-9477
Magnetic domain structure of a ferromagnetic semiconductor (Ga,Mn)As observed with scanning probe microscopes Peer-reviewed

T Fukumura, T Shono, K Inaba, T Hasegawa, H Koinuma, F Matsukura, H Ohno

PHYSICA E　10　(1-3)　135-138　2001/05

DOI： 10.1016/S1386-9477(01)00068-6 　

ISSN： 1386-9477
Fabrication and characterization of Mn doped SnO2 thin films Peer-reviewed

H Kimura, T Fukumura, H Koinuma, M Kawasaki

PHYSICA E　10　(1-3)　265-267　2001/05

DOI： 10.1016/S1386-9477(01)00096-0 　

ISSN： 1386-9477
Fabrication and characterization of Mn doped SnO2 thin films Peer-reviewed

H Kimura, T Fukumura, H Koinuma, M Kawasaki

PHYSICA E　10　(1-3)　265-267　2001/05

ISSN： 1386-9477
Large magneto-optical effect in an oxide diluted magnetic semiconductor Zn1-xCoxO Peer-reviewed

K Ando, H Saito, ZW Jin, T Fukumura, M Kawasaki, Y Matsumoto, H Koinuma

APPLIED PHYSICS LETTERS　78　(18)　2700-2702　2001/04

DOI： 10.1063/1.1368375 　

ISSN： 0003-6951
Anisotropic magnetic domain structure of layered manganite La1.4Sr1.6Mn2O7 Peer-reviewed

T Fukumura, T Hasegawa, H Sugawara, K Tanaka, H Sakaki, T Kimura, Y Tokura

APPLIED PHYSICS LETTERS　78　(14)　2023-2025　2001/04

DOI： 10.1063/1.1359778 　

ISSN： 0003-6951
Local magnetic measurements of composition-spread manganese oxide thin films with a scanning SQUID microscope Peer-reviewed

T. Kageyama, T. Hasegawa, T. Koida, M. Ohtani, T. Fukumura, M. Kawasaki, H. Koinuma

APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING　72　(8)　S273-S276　2001/04

DOI： 10.1007/s003390100666 　

ISSN： 0947-8396
Anisotropic magnetic domain structure of layered manganite La1.4Sr1.6Mn2O7 Peer-reviewed

T Fukumura, T Hasegawa, H Sugawara, K Tanaka, H Sakaki, T Kimura, Y Tokura

APPLIED PHYSICS LETTERS　78　(14)　2023-2025　2001/04

ISSN： 0003-6951
Magnetic properties of mn-doped ZnO Peer-reviewed

T Fukumura, ZW Jin, M Kawasaki, T Shono, T Hasegawa, S Koshihara, H Koinuma

APPLIED PHYSICS LETTERS　78　(7)　958-960　2001/02

DOI： 10.1063/1.1348323 　

ISSN： 0003-6951
Room-temperature ferromagnetism in transparent transition metal-doped titanium dioxide Peer-reviewed

Y Matsumoto, M Murakami, T Shono, T Hasegawa, T Fukumura, M Kawasaki, P Ahmet, T Chikyow, S Koshihara, H Koinuma

SCIENCE　291　(5505)　854-856　2001/02

DOI： 10.1126/science.1056186 　

ISSN： 0036-8075
Strong correlation between high-temperature electronic and low-temperature magnetic ordering in La1-xCaxMnO3 continuous phase diagram Peer-reviewed

Young K. Yoo, Young K. Yoo, Fred Duewer, Fred Duewer, Tomoteru Fukumura, Haitao Yang, Dong Yi, Sheng Liu, Hauyee Chang, Tetsuya Hasegawa, Tetsuya Hasegawa, Masashi Kawasaki, Masashi Kawasaki, Hideomi Koinuma, Hideomi Koinuma, Xiao-Dong Xiang

Physical Review B - Condensed Matter and Materials Physics　63　(22)　2244211-2244215　2001

DOI： 10.1103/PhysRevB.63.224421 　

ISSN： 0163-1829
High temperature growth of ZnS films on bare Si and transformation of ZnS to ZnO by thermal oxidation Peer-reviewed

YZ Yoo, Y Osaka, T Fukumura, Z Jin, M Kawasaki, H Koinuma, T Chikyow, P Ahmet, A Setoguchi, SF Chichibu

APPLIED PHYSICS LETTERS　78　(5)　616-618　2001/01

DOI： 10.1063/1.1344572 　

ISSN： 0003-6951
Ferromagnetic interactions in p- and n-type II-VI diluted magnetic semiconductors

T Andrearczyk, J Jaroszynski, M Sawicki, L Van Khoi, T Dietl, D Ferrand, C Bourgognon, J Cibert, S Tatarenko, T Fukumura, ZW Jin, H Koinuma, M Kawasaki

PROCEEDINGS OF THE 25TH INTERNATIONAL CONFERENCE ON THE PHYSICS OF SEMICONDUCTORS, PTS I AND II　87　234-235　2001

ISSN： 0930-8989
The x-ray diffraction mapping of thin films with concurrent x-ray diffractometer

M. Ohtani, T. Fukumura, M. Lippmaa, R. Takahashi, Y. Matsumoto, M. Kawasaki, H. Koinuma, K. Omote, T. Kikuchi, J. Harada

Proc. of the 5th symposium on Atomic-scale Surface and Interface Dynamics　5　335-338　2001
Artificially manipulated hole distribution in/(La, Sr)MnO₃ films by the construction of[(LaMnO₃)_m/(SrMnO₃)_m]superlattices

T. Koida, Y. Abiko, M. Lippmaa, T. Fukumura, K. Itaka, Y. Matsumoto, H. Koinuma, M. Kawasaki

Proc. of the 5th symposium on Atomic-scale Surface and Interface Dynamics　5　343-349　2001
Fabrication of transition-metal-doped epitaxial ZnO thin films and their optical and magnetotransport properties

Z. Jin, T. Fukumura, Y. Z. Yoo, M. Murakami, Y. Matsumoto, T. Sekiguchi, M. Kawasaki, T. Hasegawa, H. Koinuma

Proc. of the 5th symposium on Atomic-scale Surface and Interface Dynamics　5　357-360　2001
Temperature-gradient and composition-spread deposition of epitaxial oxide films and high throughput characterization Peer-reviewed

T Fukumura, M Ohtani, J Nishimura, T Kageyama, T Koida, M Lippmaa, M Kawasaki, T Hasegawa, H Koinuma

COMBINATORIAL AND COMPOSITION SPREAD TECHNIQUES IN MATERIALS AND DEVICE DEVELOPMENT II　4281　17-26　2001

DOI： 10.1117/12.424755 　

ISSN： 0277-786X
Transparent diluted magnetic oxide: Exploration with combinatorial technology Peer-reviewed

T. Fukumura, M. Kawasaki, H. Koinuma

Journal of Magnetics Society of Japan　25　(11)　1573-1579　2001
Strong correlation between high-temperature electronic and low-temperature magnetic ordering in Lal(1-x)Ca(x)MnO(3) continuous phase Peer-reviewed

YOO, YK, DUEWER, F., FUKUMURA, T., YANG, HT, YI, D., LIU, S., CHANG, HY, HASEGAWA, T., KAWASAKI, M., KOINUMA, H., XIANG, X.

PHYSICAL REVIEW B　6322　(22)　2001

ISSN： 0163-1829
Rapid construction of a phase diagram of doped Mott insulators with a composition-spread approach Peer-reviewed

T Fukumura, M Ohtani, M Kawasaki, Y Okimoto, T Kageyama, T Koida, T Hasegawa, Y Tokura, H Koinuma

APPLIED PHYSICS LETTERS　77　(21)　3426-3428　2000/11

DOI： 10.1063/1.1326847 　

ISSN： 0003-6951
Search for Ferromagnetic Ordering in p- and n-type II-VI Diluted Magnetic Semiconductors Peer-reviewed

T. Andrearczyk, J. Jaroszynski, G. Grabecki, M. Sawicki, Le Van Khoi, T. Dietl, D. Ferrand, C. Bourgognon, J. Cibert, S. Tatarenko, T. Fukumura, Zhengwu Jin, A. Ohtomo, H. Koinuma, M. Kawasaki

Abstract of Int. School of Semiconductor Compounds, Jaszowiec, Poland　2000/09
Observation of magnetic domain structure in a ferromagnetic semiconductor (Ga, Mn)As with a scanning Hall probe microscope Peer-reviewed

T Shono, T Hasegawa, T Fukumura, F Matsukura, H Ohno

APPLIED PHYSICS LETTERS　77　(9)　1363-1365　2000/08

DOI： 10.1063/1.1290273 　

ISSN： 0003-6951
Magnetic domain structures of (Ga,Mn)As investigated by scanning Hall probe microscopy Peer-reviewed

T Shono, T Fukumura, M Kawasaki, H Koinuma, T Hasegawa, T Endo, K Kitazawa, F Matsukura, H Ohno

PHYSICA B　284　1171-1172　2000/07

ISSN： 0921-4526
Combinatorial laser MBE synthesis of 3d ion doped epitaxial ZnO thin films Peer-reviewed

ZW Jin, M Murakami, T Fukumura, Y Matsumoto, A Ohtomo, M Kawasaki, H Koinuma

JOURNAL OF CRYSTAL GROWTH　214　55-58　2000/06

DOI： 10.1016/S0022-0248(00)00058-0 　

ISSN： 0022-0248
コンビナトリアル手法によるZnOをベースとした酸化物磁性半導体の探索 Peer-reviewed

FUKUMURA Tomoteru

第36回光スピニクス専門研究会　2000
High Speed Synthesis and Characterization of Manganite Thin Films Peer-reviewed

FUKUMURA Tomoteru

18th General Conference of the Condensed Matter Division of the European Physical Society　2000
Can ZnO Eat Market in Optoelectronic Applications? Peer-reviewed

M. Kawasaki, K. Tamura, K. Saikusa, T. Aita, A. Tsukazaki, A. Ohtomo, Z. Jin, Y. Matsumoto, T. Fukumura, H. Koinuma

Solid State Devices and Materials　2000　128-129　2000
The use of parallel synthesis and characterization techniques in thin film growth dynamic studies

M. Lippmaa, D. Komiyama, T. Koida, M. Ohtani, A. Ohtomo, T. Fukumura, S. Sasaki, K. Omote, T. Kikuchi, H. Koinuma, M. Kawasaki

Proc. of the 4th symposium on Atomic-scale Surface and Interface Dynamics　4　431-436　2000
走査型ホール素子顕微鏡による異常な強磁性体の磁区観察 Peer-reviewed

T. Fukumura, T. Hasegawa

日本物理学会誌　55　(7)　519-524　2000
Publisher: The Physical Society of Japan (JPS)
DOI： 10.11316/butsuri1946.55.519 　

ISSN： 0029-0181
Development of a scanning Hall probe microscope for simultaneous magnetic and topographic imaging Peer-reviewed

T Fukumura, H Sugawara, K Kitazawa, T Hasegawa, Y Nagamune, T Noda, H Sakaki

MICRON　30　(6)　575-578　1999/12

DOI： 10.1016/S0968-4328(99)00056-6 　

ISSN： 0968-4328
An oxide-diluted magnetic semiconductor: Mn-doped ZnO Peer-reviewed

T Fukumura, ZW Jin, A Ohtomo, H Koinuma, M Kawasaki

APPLIED PHYSICS LETTERS　75　(21)　3366-3368　1999/11

DOI： 10.1063/1.125353 　

ISSN： 0003-6951
Spontaneous bubble domain formation in a layered ferromagnetic crystal Peer-reviewed

T Fukumura, H Sugawara, T Hasegawa, K Tanaka, H Sakaki, T Kimura, Y Tokura

SCIENCE　284　(5422)　1969-1971　1999/06

DOI： 10.1126/science.284.5422.1969 　

ISSN： 0036-8075
ZnMnO as a novel diluted magnetic semiconductor system

T. Fukumura, Z. W. Jin, A. Ohtomo, H. Koinuma, M. Kawasaki

Proceedings of the third Symposium on Atomic Scale Surface and Interface Dynamics　3　161-162　1999
An efficient way of doping experiments : Combinatorial laser MBE synthesis of epitaxial ZnO thin film doped with Sc, Ti, V, Cr, Mn, Fe, Co, Ni, and Cu

Z. Jin, T. Fukumura, M. Murakami, Y. Matsumoto, A. Ohtomo, M. Kawasaki, H. Koinuma

Extended Abstracts of the 5th Symposium on the Physics and Application of Spin-related Phenomena in Semiconductors　46-49　1998
Photoemission Study of the Oxide-Diluted magnetic Semiconductor Zn_1-xMn_xO

T. Nambu, J. Okabayashi, T. Mizokawa, A. Fujimori, T. Fukumura, M. Kawasaki

Extended Abstracts of the 5th Symposium on the Physics and Application of Spin-related Phenomena in Semiconductors　54-57　1998
A Novel Oxide DMS : Mn doped ZnO

T. Fukumura, Z. W. Jin, A. Ohtomo, H. Koinuma, M. Kawasaki

Extended Abstracts of the 4th Symposium on the Physics and Application of Spin-related Phenomena in Semiconductors　109-112　1998
Observation of ferromagnetic material and high temperature superconductor with variable-temperature scanning Hall probe microscope Peer-reviewed

T. Fukumura, H. Sugawara, K, Kitazawa, T. Hasegawa, K. Tanaka, T. Noda, H. Sakaki, N. Kanda, M. Kawasaki, H. Koinuma, H. Taguchi, J. Nakagawa, H. Nishio

J. Mag. Soc. Jpn.　22　(4)　845-848　1998
Publisher: The Magnetics Society of Japan
DOI： 10.3379/jmsjmag.22.845 　

ISSN： 0285-0192

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A variable-temperature scanning Hall probe microscope was developed for imaging a microscopic magnetic field distribution. The microscope probes the surface of magnetic materials with a micro-Hall probe, whose active area is 0.6-2.0 μm². The microscope's operating temperature range is between room temperature and liquid He temperature. The results of observing magnetic images of a thermally demagnetized permanent Sr-ferrite magnet at room temperature and a high-temperature superconducting NdBa₂Cu₃O_y thin film at 77 K are presented.
Scanning Hall Probe Microscopy for Simultaneous Topographic and Magnetic Imaging Peer-reviewed

T. Fukumura, H. Sugawara, T. Hasegawa, K. Kitazawa, K. Tanaka, T. Noda, H. Sakaki, Y. Nagamune, H. Taguchi, J. Nakagawa, H. Nishio

Bull. Am. Phys. Soc.　42　165　1997

Show all ︎Show first 5

Misc. 78

高い電気伝導性をもつ希土類単純酸化物 Invited

神永健一, 岡大地, 福村知昭

東北大学極低温科学センターだより　20　2-5　2019/11
2 価の希土類イオン化合物の新展開ー錯体から無機固体まで Invited

神永健一, 福村知昭

月刊化学　73　(11)　64-65　2018/10
Finding superconductivity in unexpected places

Tomoteru Fukumura, Kenichi Kaminaga

AiM Research　2018
Bi^2-正方格子を持つ新規層状酸化物超伝導体Y₂O₂Bi

清良輔, 清良輔, 気谷卓, 福村知昭, 川路均, 長谷川哲也

応用物理学会春季学術講演会講演予稿集(CD-ROM)　63rd　ROMBUNNO.20P-W833-17　2016/03/03
(Ti,Co)O₂の電界誘起室温強磁性 : 室温強磁性の起源を求めて

福村知昭

固体物理　46　(12)　809-816　2011/12
Publisher: アグネ技術センター
ISSN： 0454-4544
21pPSA-56 Magnetooptical spectroscopy in EuO thin films II

Makino T., Liu F., Yamazaki T., Ueno K., Tsukazaki A., Fukumura T., Kong Y. F., Kawasaki M.

Meeting abstracts of the Physical Society of Japan　66　(2)　733-733　2011/08/24
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
21aGP-2 Carrier-mediated room temperature ferromagnetism and its electric field control in cobalt-doped titanium dioxide

Yamada Y., Ueno K., Fukumura T., Yuan H. T., Shimotani H., Iwasa Y., Gu L., Tsukimoto S., Ikuhara Y., Kawasaki M.

Meeting abstracts of the Physical Society of Japan　66　(2)　832-832　2011/08/24
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
Oxide Semiconductor Spintronics

FUKUMURA Tomoteru, YAMASAKI Takashi, YAMADA Yoshinori, UENO Kazunori, KAWASAKI Masashi

Journal of the Surface Science Society of Japan　32　(3)　134-138　2011/03/10
Publisher: 日本表面科学会
DOI： 10.1380/jsssj.32.134 　

ISSN： 0388-5321 1881-4743

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Semiconductor spintronics is an extensively studied field toward next generation devices. For room temperature operation of semiconductor spintronics, high temperature ferromagnetic semiconductor is needed. This paper reviews recent progress of one of the high temperature ferromagnetic semiconductors, ferromagnetic oxide semiconductor, mainly Co-doped TiO₂.
28aHC-13 Magneto-optical spectroscopy in EuO thin films

Makino T., Liu F., Yamasaki T., Ueno K., Tsukazaki A., Fukumura T., Kong Y. F., Kawasaki M.

Meeting abstracts of the Physical Society of Japan　66　(1)　804-804　2011/03/03
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
Electronic-Field Control of Two-Dimensional Electrons in Polymer-Gated-Oxide Semiconductor Heterostructures (vol 22, pg 876, 2010)

Masaki Nakano, Atsushi Tsukazaki, Akira Ohtomo, Kazunori Ueno, Shunsuke Akasaka, Hiroyuki Yuji, Ken Nakahara, Tomoteru Fukumura, Masashi Kawasaki

ADVANCED MATERIALS　22　(45)　CP32-CP32　2010/12

ISSN： 0935-9648
Development and Application of a High-throughput Screening System for Thermoelectric Thin Film Library

WATANABE Masaki, KITA Takuji, FUKUMURA Tomoteru, KAWASAKI Masashi

Ceramics Japan　45　(9)　696-700　2010/09/01
Publisher: 日本セラミックス協会
ISSN： 0009-031X
24aRG-6 Excitonic characteristics in wide band-gap CuTMO_2 epitaxial thin films 2

Makino T., Liu F., Hiraga H., Fukumura T., Kong Y. F., Kawasaki M.

Meeting abstracts of the Physical Society of Japan　65　(2)　695-695　2010/08/18
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
酸化亜鉛系分極不整合界面の2次元伝導と導電性高分子を用いた伝導性制御

塚崎敦, 中野匡規, 大友明, 上野和紀, 赤坂俊輔, 湯地洋行, 中原健, 福村知昭, 川崎雅司

まてりあ　49　(7月)　312-313　2010/07
Publisher: The Japan Institute of Metals and Materials
DOI： 10.2320/materia.49.312 　

ISSN： 1340-2625
21aHK-8 Indication of intrinsic ferromagnetism in anatase Ti_<1-x>CO_xO_<2-δ> thin films : An x-ray magnetic circular dichroism study

Singh V R., Kataoka T., Yamazaki Y., Fujimori A., Chang F. -H., Lin H. -J., Huang D. -J., Chen C. T., Yamada Y., Fukumura T., Kawasaki M.

Meeting abstracts of the Physical Society of Japan　65　(1)　750-750　2010/03/01
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
21aHL-4 Excitonic characteristics in wide band-gap CuTMO_2 epitaxial thin films

Makino T., Liu F., Hiraga H., Fukumura T., Ohtomo A., Kong Y. F., Kawasaki M.

Meeting abstracts of the Physical Society of Japan　65　(1)　752-752　2010/03/01
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
25aXD-2 Changing electronic state of Ti_<1-x>Co_xO_2 under light illumination III

Yamashita N., Sudayama T., Mizokawa T., Yamada Y., Toyosaki H., Fukumura T., Kawasaki M.

Meeting abstracts of the Physical Society of Japan　64　(2)　573-573　2009/08/18
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
Vortex dynamics in a NbN film studied by terahertz spectroscopy

Y. Ikebe, R. Shimano, M. Ikeda, T. Fukumura, M. Kawasaki

PHYSICAL REVIEW B　79　(17)　174525-1-7　2009/05

DOI： 10.1103/PhysRevB.79.174525 　

ISSN： 2469-9950

eISSN： 2469-9969
30aVE-8 Changing electronic state of Ti_<1-x>Co_xO_2 under light illumination II

Yamashita N., Sudayama T., Takubo K., Mizokawa T., Yamada Y., Toyosaki H., Fukumura T., Kawasaki M.

Meeting abstracts of the Physical Society of Japan　64　(1)　712-712　2009/03/03
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
光照射によるTi_1-xCo_xO₂の電子状態変化 II

山下直飛人, 須田山貴亮, 田久保耕, 溝川貴司, 山田良則, 豊崎秀海, 福村知昭, 川崎雅司

日本物理学会講演概要集　64　(1)　712　2009/03/03

ISSN： 1342-8349
磁性半導体Ti_1-xCo_xO_2-δの軟X線磁気円二色性による研究

坂本勇太, 小林正起, 片岡隆史, 山崎陽, 藤森淳, 藤森淳, 藤森淳, 竹田幸治, 大河内拓雄, 岡根哲夫, 斉藤祐児, 山上浩志, CHANG F.-H., LEE L., LIN H.-J., HUANG D.-J., CHEN C. T., 豊崎秀海, 福村知昭, 川崎雅司, 川崎雅司, 川崎雅司

日本放射光学会年会・放射光科学合同シンポジウム予稿集　22nd　2009
Optical and magnetic properties of CuMnO2 epitaxial thin films

H. Hiraga, T. Fukumura, A. Ohtomo, T. Makino, A. Ohkubo, H. Kimura, M. Kawasaki

APPLIED PHYSICS LETTERS　95　(3)　032109　2009

DOI： 10.1063/1.3186790 　

ISSN： 0003-6951
21aYK-4 Electronic state change of Ti_<1-x>Co_xO_2 induced by light illumination

Yamashita N., Sudayama T., Takubo K., Mizokawa T., Toyosaki H., Fukumura T., Kawasaki M.

Meeting abstracts of the Physical Society of Japan　63　(2)　603-603　2008/08/25
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
光照射によるTi_1-xCo_xO₂の電子状態変化

山下直飛人, 須田山貴亮, 田久保耕, 溝川貴司, 豊崎秀海, 福村知昭, 川崎雅司

日本物理学会講演概要集　63　(2)　603　2008/08/25

ISSN： 1342-8349
24aWJ-4 Magnetic field and temperature dependences of x-ray magnetic circular dichroism of Ti_<1-x>Co_xO_<2-δ>

Sakamoto Y., Kobayashi M., Kataoka T., Song G. S., Fujimori A., Chang F.H., Lee L., Lin H.-J., Huang D.J., Chen C.T., Toyosaki H., Fukumura T., Kawasaki M.

Meeting abstracts of the Physical Society of Japan　63　(1)　674-674　2008/02/29
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
ボロンドープダイヤモンド薄膜のボルテックス観察

岡崎壮平, 岡崎壮平, 立木昌, 福村知昭, 川崎雅司, 野島勉, 入山慎吾, 岡田竜介, 川原田洋, 鯉沼秀臣, 鯉沼秀臣, 鯉沼秀臣

応用物理学関係連合講演会講演予稿集　55th　(2)　2008
磁性半導体Ti_1-xCo_xO_2-δのX線磁気円二色性の組成およびキャリア濃度依存性

坂本勇太, 小林正起, 片岡隆史, SONG G. S., 藤森淳, 藤森淳, CHANG F.-H., LEE L., LIN H.-J., HUANG D. J., CHEN C. T., 大河内拓雄, 竹田幸治, 岡根哲夫, 斉藤祐児, 山上浩志, 豊崎秀海, 福村知昭, 川崎雅司, 川崎雅司, 川崎雅司

日本物理学会講演概要集　63　(2)　2008

ISSN： 1342-8349
21aYK-3 Carrier and composition dependences of x-ray magnetic circular dichroism of Ti_<1-x>Co_xO_<2-δ>

Sakamoto Y, Chen C. T, Ohkochi T, Takeda Y, Okane T, Saitoh Y, Yamagami H, Toyosaki H, Fukumura T, Kawasaki M, Kobayashi M, Kataoka T, Song G. S, Fujimori A, Chang F.-H, Lee L, Lin H.-J, Huang D. J

Meeting Abstracts of the Physical Society of Japan　63　(0)　603-603　2008
Publisher: The Physical Society of Japan
ISSN： 1342-8349
A Scaling Behavior of Anomalous Hall Effect in Cobalt Doped TiO2

T. Fukumura, H. Toyosaki, K. Ueno, M. Nakano, T. Yamasaki, M. Kawasaki

FRONTIERS IN MATERIALS RESEARCH　10　87-+　2008

ISSN： 1435-1889
X-ray anomalous scattering of diluted magnetic oxide semiconductors: Possible evidence of lattice deformation for high temperature ferromagnetism

Takeshi Matsumura, Daisuke Okuyama, Shinya Niioka, Hideaki Ishida, Tadashi Satoh, Youichi Murakami, Hidemi Toyosaki, Yasuhiro Yamada, Tomoteru Fukumura, Masashi Kawasaki

PHYSICAL REVIEW B　76　(11)　115320-1-5　2007/09

DOI： 10.1103/PhysRevB.76.115320 　

ISSN： 2469-9950

eISSN： 2469-9969
21pXQ-1 Conductivity measurements of superconducting NbN film under magnetic field by terahertz time domain spectroscopy

Ikebe Y., Shimano R., Ikeda M., Fukumura T., Kawasaki M.

Meeting abstracts of the Physical Society of Japan　62　(2)　807-807　2007/08/21
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
21pXQ-2 Terahertz time domain spectroscopy on B1 type superconductor ZrN film

Mori M, Mori T, Toyota N, Zhu Y. B, Fukumura T, Kawasaki M

Meeting Abstracts of the Physical Society of Japan　62　(0)　807-807　2007
Publisher: The Physical Society of Japan
ISSN： 1342-8349
世界を震撼させた強磁性酸化物半導体の発見

豊崎秀海, 福村知昭, 川崎雅司

化学工業　58　(2)　160-165　2007
Publisher: 化学工業社
ISSN： 0451-2014
First principles investigation of the magnetic circular dichroism spectra of Co-doped anatase and rutile TiO2

HM Weng, JM Dong, T Fukumura, M Kawasaki, Y Kawazoe

PHYSICAL REVIEW B　73　(12)　121201　2006/03

DOI： 10.1103/PhysRevB.73.121201 　

ISSN： 2469-9950

eISSN： 2469-9969
CoドープTiO2の強磁性とデバイス応用の可能性

福村知昭, 豊崎秀海, 中野匡規, 川崎雅司

固体物理　41　(6)　415-421　2006
Publisher: アグネ技術センタ-
ISSN： 0454-4544
Spin-related magnetoresistance of n-type ZnO : Al and Zn1-xMnxO : Al thin films

T Andrearczyk, J Jaroszynski, G Grabecki, T Dietl, T Fukumura, M Kawasaki

PHYSICAL REVIEW B　72　(12)　121309　2005/09

DOI： 10.1103/PhysRevB.72.121309 　

ISSN： 2469-9950

eISSN： 2469-9969
12aYC-11 XMCD in Co L-edge XAS of room temperature ferromagnet, rutile-type Ti_<1-x>Co_xO_2

Mamiya K., Koide T., Fujimori A., Tokano H., Manaka H., Tanaka A., Toyosaki H., Fukumura T., Kawasaki M.

Meeting abstracts of the Physical Society of Japan　59　(2)　586-586　2004/08/25
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
12aYC-10 Electronic structure of Ti_<1-x>Co_xO_2 studied by x-ray photoemission spectroscopy

Shibata A., Mizokawa T., Quilty J., Takubo K., Toyosaki H., Fukumura T., Kawasaki M.

Meeting abstracts of the Physical Society of Japan　59　(2)　586-586　2004/08/25
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
27pXC-11 Synthesis and optical study of epitaxially stabilized Sr_2NiO_3

Ohtani M, Sakurada H, Fukumura T, Makino T, Matsuno J, Okimoto Y, Okamoto H, Tokura Y, Segawa Y, Kawasaki M

Meeting abstracts of the Physical Society of Japan　59　(1)　530-530　2004/03/03
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
28pXB-10 Valence state of Mn ion in [(LaMnO_3)_m(SrMnO_3)_m]_n artificial superlattices

Nakao H, Nishimura J, Kodama S, Satoh T, Murakami Y, Ohtomo A, Fukumura T, Kawasaki M, Koida T

Meeting abstracts of the Physical Society of Japan　59　(1)　586-586　2004/03/03
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
Local magnetic properties of pyrochlore Mo oxide probed by scanning SQUID microscopy

Suenaga T., Fan X. J., Zhao X. R., Koinuma H., Kawasaki M., Fukumura T., Hasegawa T.

Meeting abstracts of the Physical Society of Japan　58　(2)　416-416　2003/08/15
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
Transparent spin electronics with wide-gap oxide semiconductors

T. Fukumura, M. Kawasaki

Future Materials　3　(6)　30-36　2003/06/01
Publisher: NTS
ISSN： 1346-0986
ZnO/LiGaO₂/GaNヘテロ構造の作製

福崎正志, 西井潤弥, 塚崎敦, 大友明, 福村知昭, 大西剛, 角谷正友, 大野英男, 川崎雅司

応用物理学関係連合講演会講演予稿集　50th　(1)　339　2003/03/27
A-site ion radius dependence of third-order optical nonlinearity in one-dimensional cuprate

Ohtani M., Sakurada H., Fukumura T., Makino T., Yamamoto K., Okamoto H., Tokura Y., Segawa Y., Kawasaki M.

Meeting abstracts of the Physical Society of Japan　58　(1)　704-704　2003/03/06
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
Local magnetic properties of pyrochlore Sm_2Mo_2O_7 probed by scanning SQUID microscopy

Suenaga T., Fan X. J., Zhao X. R., Koinuma H., Kawasaki M., Fukumura T., Hasegawa T.

Meeting abstracts of the Physical Society of Japan　58　(1)　426-426　2003/03/06
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
Spintronics and nanochemistry

福村知昭

Modern Chemistry　380　(11)　50-54　2002/11/01
Publisher: Tokyo Kagaku Doujin
Electronic structure of diluted magnetic semiconductor ZnO:TM studied by x-ray absorption spectroscopy

Okabayashi J., Ono K., Mizuguchi M., Yamada M., Oshima M., Mizokawa T., Fujimori A., Yuri M., Chen C.T., Fukumura T., Kawasaki M.

Meeting abstracts of the Physical Society of Japan　57　(2)　574-574　2002/08/13
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
Synthesis and magneto-transport properties of pyrochlore molybdenum oxide epitaxial thin film

Nishimura J., Fukumura T., Ohguchi H., Ohtani M., Ono K., Taguchi Y., Oshima M., Tokura Y., Koinuma H., Murakami Y., Kawasaki M.

Meeting abstracts of the Physical Society of Japan　57　(2)　548-548　2002/08/13
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
酸化物磁性半導体の極低温・強磁場電子輸送特性 (強磁場下の物性の研究--磁性)

福村知昭, 山田康博, 豊崎秀海

東北大学金属材料研究所強磁場超伝導材料研究センター年次報告　2002　109-111　2002
Publisher: 東北大学金属材料研究所附属強磁場超伝導材料研究センター
コンビナトリアルレーザーMBE装置を用いた高速合成・条件最適化プロセスの確立

村上真, 高橋竜太, 松本祐司, 福村知昭, M.Lippmaa, 川崎雅司, 鯉沼秀臣

JST-CREST「単一分子・原子レベルの反応制御」2期チーム終了シンポジウム　2002
コンビナトリアルマテリアルの放射光X線分析による評価法の開発(1)

中井泉, 福田勝利, 寺田靖子, 福村知昭, 川崎雅司, 松本祐司, 鯉沼秀臣, 高田和典, 渡辺遵

第15回日本放射光学会年会・放射光科学合同シンポジウム　2002
Application of Scanning Probe Microscopes to Magnetic Semiconductor and Colossal Magnetoresistive Material

FUKUMURA Tomoteru, HASEGAWA Tetsuya

J. Surf. Sci. Soc. Jpn.　23　(4)　233-238　2002
Publisher: The Surface Science Society of Japan
DOI： 10.1380/jsssj.23.233 　

ISSN： 0388-5321 1881-4743

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The existence of magnetic domain has been known for a long time, and its importance is further growing because of rapid storage density increase of recording media. Magnetic domain observations made it possible to derive the microscopic magnetic parameters such as the magnetic anisotropy and the domain wall energy connected with exchange interaction in addition to the size of magnetic domain. Among the various methods for observing the magnetic domain, scanning probe microscopes are powerful tools owing to the user-friendliness and the flexibility to sample specimen and measurement environment. These instruments enable us to evaluate three dimensional magnetic domain structure and to explore novel magnetic materials in a high throughput way. Here, we show the results obtained from the measurements of ferromagnetic semiconductors, Mn doped GaAs and Co doped TiO₂ thin films, and a colossal magnetoresistive material, La_1−xSr_xMnO₃ composition-spread film.
Magntic domain structures of (Ga,Mn)As probed by scanning SQUID microscopy : irradiation effect

Inaba K., Fukumura T., Koinuma H., Hasegawa T., Chiba D., Takamura K., Matsukura F., Ohno H.

Meeting abstracts of the Physical Society of Japan　56　(2)　523-523　2001/09/03
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
Measurements of Cr-doped manganite thin films with a scanning SQUID microscope

Kageyama T., Ogimoto Y., Fukumura T., Kawasaki M., Kimura T, Tokura Y., Koinuma H., Hasegawa T.

Meeting abstracts of the Physical Society of Japan　56　(1)　468-468　2001/03/09
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
Control of spin frustration in manganite superlattices embedded with antifenomagneric dots

Nakagawa N., Lippmaa Mikk, Shibuya K., Ohtani M., Fukumura T., Koinuma H., Kawasaki M.

Meeting abstracts of the Physical Society of Japan　56　(1)　380-380　2001/03/09
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
High Throughput Research on ZnO Films and Superlattices by Combinatorial Methodology

M. Kawasaki, A. Ohtomo, K. Tamura, T. Fukumura, Zhengwu Ji, H. Kimura, A. Tsukazaki, H. Saito, C. Hirose, Y. Matsumoto, H. Koinuma, T, Makino H, D. Sun, Y. Se

13th Int’l Conf. on Crystal Growth in Conjunction with 11th Int’l Conf. on Vapor Growth and Epitaxy　590　2001
Magneto-optical spectra of oxide-diluted magnetic semicondudor Zn_<1-x>TM_xO

Ando K., Saito H., Jin Zhengwu, Fukumura T., Matsumoto Y., Kawasaki M., Koinuma H.

Meeting abstracts of the Physical Society of Japan　55　(2)　572-572　2000/09/10
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
Control of spin frustration in manganite superlattices by embedding antiferromagnetic layer

Nakagawa N., Lippmaa M., Ohguchi H., Shibuya K., Koida T., Fukumura T., Oshima M., Koinuma H., Kawasaki M.

Meeting abstracts of the Physical Society of Japan　55　(2)　478-478　2000/09/10
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
Magntic domain structures of diluted magnetic semiconductor (Ga,Mn)As probed by scanning SQUID microscopy

Shono T., Fukumura T., Matsukura F., Ohno H., Koinuma H., Hasegawa T.

Meeting abstracts of the Physical Society of Japan　55　(1)　563-563　2000/03/10
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
Photoemission study of Zn_<1-x>Mn_xO

Nambu T., Okabayashi J., Mizokawa T., Fujimori A., Fukumura T., Kawasaki M.

Meeting abstracts of the Physical Society of Japan　55　(1)　577-577　2000/03/10
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
Magnetic properties of oxide diluted magnetic semiconductor Zn_<1-x>Mn_xO film

Fukumura T., Jin Zhengwu, Yoo Y. Z., Hasegawa K., Ohtomo A., Shono T., Hasegawa T., Koinuma H., Kawasaki M.

Meeting abstracts of the Physical Society of Japan　55　(1)　576-576　2000/03/10
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
High throughput characterization for crystal structure and mangetism of composition-spread Mn oxide film

Fukumura T., Ohtani M., Kageyama T., Shono T., Koida T., Kawasaki M., Hasegawa T., Koinuma H.

Meeting abstracts of the Physical Society of Japan　55　(1)　493-493　2000/03/10
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
Measurements of composition-spread manganese oxides in epitaxial thin film form with a scanning SQUID microscope

Kageyama T., Shono T., Fukumura T., Hasegawa T., Yoo Y. K., Duewer F., Xiang X. D., Kawasaki M., Koinuma H.

Meeting abstracts of the Physical Society of Japan　55　(1)　493-493　2000/03/10
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
Magnetic and optical properties of 3d transition metal doped ZnO thin films

Z.W. Jin, T. Fukumura, Y.Z. Yoo, M, Murakami T, Sekiguchi Y, Matsumoto M, Kawasaki, H. Koinuma

Abst. The Int'l Conf. on the Physics and Application of Spin-Related Phenomena in Semiconductors　57　2000
24aC-3 Magntic domain structures of dihited magnetic semi-conductor(Ga, Mn)As

Shono T, Fukumura T, Matsukura H, Ohno H, Hasegawa T

Meeting abstracts of the Physical Society of Japan　54　(2)　587-587　1999/09/03
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
酸化物人工格子のパラレル合成と評価

川崎雅司, 大西剛, 小宮山大輔, 鯉田崇, 大友明, 福村知昭, 松本祐司, LIPPMAA M, 鯉沼秀臣

応用物理学会学術講演会講演予稿集　60th　(0)　34　1999/09/01
コンビナトリアルレーザーMBE法によるSrVO₃/SrTiO₃超格子の作製と評価

小宮山大補, 鯉田崇, 大西剛, 福村知昭, 大谷亮, LIPPMAA M, 川崎雅司, 鯉沼秀臣

応用物理学会学術講演会講演予稿集　60th　(2)　502　1999/09/01
29p-ZE-3 Domain obsarvation of diluted magnetic semi-conductor(Ga, Mn)As by Scanning Hall Probe Microscope

Shono T., Endo T., Fukumura T., Matsukura F., Ohno H., Kitazawa K., Hasegawa T.

Meeting abstracts of the Physical Society of Japan　54　(1)　152-152　1999/03/15
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
Observation of magnetic domain in layered manganese oxide La_<2-2x>Sr_<1+2x>Mn_2O_7 with a scanning Hall probe microscope

FUKUMURA T., SUGAWARA H., KITAZAWA K., HASEGAWA T., TANAKA K., SAKAKI H., KIMURA T., TOKURA Y.

Meeting abstracts of the Physical Society of Japan　53　(1)　624-624　1998/03/10
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
Grain size dependence of microscopic magnetic field distribution in ferrite (Observation of magnetic field distribution with scanning Hall probe microscope)

FUKUMURA T., WATANABE T., SUGAWARA H., KITAZAWA K., TANAKA K., NODA T., SAKAKI H., HASEGAWA T., TAGUCHI H., NAKAGAWA J., NISHIO H.

21　62-62　1997/10/01
28a-PS-45 Observation of magnetic materials with scanning Hall probe-tunneling microscope III

Fukumura T., Sugawara H., Hasegawa T., Kitazawa K., Tanaka K., Noda T., Sakaki H., Nagamune Y., Taguchi H., Nakagawa J., Nishio H.

Meeting abstracts of the Physical Society of Japan　52　(1)　415-415　1997/03/17
Publisher: The Physical Society of Japan (JPS)
ISSN： 1342-8349
A Scanning Probe Microscope for Simultaneous Observation of Magnetic Field Distribution and Topographic Structure

Sugawara H., Fukumura T., Hasegawa T., Kitazawa K., Nagamune Y., Noda T., Sakaki H.

Abstracts of the meeting of the Physical Society of Japan. Sectional meeting　1996　(2)　147-147　1996/09/13
Publisher: The Physical Society of Japan (JPS)
Observation of magnetic materials with scanning Hall probe-tunneling microscope II

Fukumura T., Sugawara H., Hasegawa T., Kitazawa K., Nagamune Y., Noda T., Sakaki H., Taguchi H., Nishio H.

Abstracts of the meeting of the Physical Society of Japan. Sectional meeting　1996　(3)　33-33　1996/09/13
Publisher: The Physical Society of Japan (JPS)
1p-pSA-17 Observation of magnetic materials with scanning Hall probe-tunneling microscope

Fukumura T., Sugawara H., Hasegawa T., Kitazawa K., Nagamune Y., Sakaki H.

Abstracts of the meeting of the Physical Society of Japan. Annual meeting　51　(3)　143-143　1996/03/15
Publisher: The Physical Society of Japan (JPS)
Development of Scanning Tunneling Microscope combined with micro Hall sensor

Fukumura T., Taneda T., Nagamune Y., Hasegawa T., Sugawara H., Sakaki H., Kitazawa K.

Abstracts of the meeting of the Physical Society of Japan. Sectional meeting　1995　(3)　128-128　1995/09/12
Publisher: The Physical Society of Japan (JPS)
LT-STM Observation on the Surface Electronic State of the Bismathate Superconductor

Ogino M, Shiraki S, Nantoh M, Fukumura T, Taneda T, Sugawara H, Hasegawa T, Kitazawa K

Abstracts of the meeting of the Physical Society of Japan. Annual meeting　50　(3)　380-380　1995/03/16
Publisher: The Physical Society of Japan (JPS)
15a-E-2 Scanning Tunneling Spectroscopy on Single Crystalline Bi_2Sr_2CaCu_2O_y

Ogino M., Takagi A., Fukumura T., Nantoh M., Hasegawa T., Kitazawa K.

Abstracts of the meeting of the Physical Society of Japan. Sectional meeting　1993　(3)　478-478　1993/09/20
Publisher: The Physical Society of Japan (JPS)
15a-E-1 Tunneling spectrosocpy of Y-based oxide superconductors and its surface electronic properties

Hasegawa T., Nantoh M., Takagi A., Ogino M., Fukumura T., Kawasaki M., Gong J., Koinuma H., Kitazawa K.

Abstracts of the meeting of the Physical Society of Japan. Sectional meeting　1993　(3)　477-477　1993/09/20
Publisher: The Physical Society of Japan (JPS)
25a-Q-8 Cryogenic STM Observation of YBa_2Cu_3O_y Thin Film

Nantoh M, Hasegawa T, Takagi A, Ogino M, Kawasaki M, Gong J.P., Fukumura T, Ikuta H, Koinuma H, Kitazawa K

1992　(3)　258-258　1992/09/14
Publisher: The Physical Society of Japan (JPS)

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Books and Other Publications 6

Electric-field control of magnetism in ferromagnetic semiconductors

Tomoteru Fukumura

Wiley-VCH　2015/06

ISBN: 9781118751916
Combinatorial technology

T. Fukumura

Maruzen　2004/08/30
Laser ablation

T. Fukumura

イオン工学研究所　2003/01/01
Synthesis of thick and thin films

T. Fukumura

Handbook of Ceramic Enginnering, Vol. 2　2002

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分担執筆
Laser deposition methods; Oxide/Semiconductor Systems

T. Fukumura

Handbook of Applied Physics, Ver. 2　2002

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分担執筆
Oxide Electronics

T. Fukumura

2001/10

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分担執筆

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Presentations 194

Microscopic magnetism in high TC ferromagnetic oxide semiconductor: anatase Co-doped TiO₂ International-presentation

Thantip K. Krasienapibal, Tomoteru Fukumura, Tetsuya Hasegawa

MMM Intermag 2016 Joint Conference　2016/01/11
Dielectric Properties of Molecularly-Thin Titania Nanosheets International-presentation

Daisuke Ogawa, Yoonhyun Kim, Kosho Akatsuka, Minoru Osada, Tomoteru Fukumura, Tetsuya Hasegawa, Takayoshi Sasaki

Pacific Chem　2015/12/15
Topotactic fluorination of perovskite-type strontium ruthenate thin films using polyvinylidene fluoride International-presentation

Keisuke Kawahara, Akira Chikamatsu, Tsukasa Katayama, Tomoya Onozuka, Tomoteru Fukumura, Tetsuya Hasegawa

Pacific Chem　2015/12/15
Structural chemistry and physical properties of fluorine-substituted perovskite nickelate NdNiO3-xF_x thin films International-presentation

Tomoya Onozuka, Akira Chikamatsu, Tsukasa Katayama, Tomoteru Fukumura, Tetsuya Hasegawa

Pacific Chem　2015/12/15
Strong carrier localization in LaVO₃-_yN_y perovskite-type oxynitride epitaxial thin films grown by nitrogen-plasma-assisted pulsed laser deposition International-presentation

Masahito Sano, Yasushi Hirose, Shoichiro Nakao, Tomoteru Fukumura, Tetsuya Hasegawa

Pacific Chem　2015/12/15
Large perpendicular magnetic anisotropy in noble metal-free manganese nitride epitaxial thin film International-presentation

Akira Chikamatsu, Xi Shen, Kei Shigematsu, Yasushi Hirose, Tomoteru Fukumura, Tetsuya Hasegawa

Pacific Chem　2015/12/15
Structural, electrical, and magnetic phase transitions in AX-type mixed valence cobalt oxynitrides epitaxial thin films International-presentation

Yasushi Hirose, Jumpei Takahashi, Daichi Oka, Shoichiro Nakao, Chang Yang, Tomoteru Fukumura, Tetsuya Hasegawa

Pacific Chem　2015/12/15
Transparent Oxide Spintronics International-presentation

The 4th Dalian University of Technology-Tohoku University Joint Symposium on Chemistry "Challenges in Environmental, Biomedical, and Materials Science & Technology"　2015/10/27
DFT-based ab initio MD simulation of the ionic conduction in doped ZrO2 systems under epitaxial strain International-presentation

Mayuko Oka, Hideyuki Kamisaka, Tomoteru Fukumura, Tetsuya Hasegawa

MANA-RSC symposium: Materials for Energy Generation and Storage　2015/10/15
Epitaxial growth of yttrium monoxide thin film International-presentation

Kenichi Kaminaga, Ryosuke Sei, Tomoteru Fukumura, Tetsuya Hasegawa

2015 International Conference on Solid State Devices and Materials (SSDM 2015)　2015/09/27
Topotactic reductive synthesis of A-site cation-ordered perovskite YBaCo₂O_x(_x = 4.5-5.5) epitaxial thin films International-presentation

Tsukasa Katayama, Akira Chikamatsu, Tomoteru Fukumura, Tetsuya Hasegawa

2015 International Conference on Solid State Devices and Materials (SSDM 2015)　2015/09/27
On the high TC ferromagnetism in Co-doped TiO₂ International-presentation

Thantip S. Krasienapibal, Tomoteru Fukumura, Hideyuki Kamisaka, Tetsuya Hasegawa

E-MRS Fall Meeting　2015/09/15
Topotactic reactions of strontium cobalt oxide thin films with metal hydride International-presentation

Tsukasa Katayama, Akira Chikamatsu, Hideyuki Kamisaka, Tomoteru Fukumura, Tetsuya Hasegawa

E-MRS Fall Meeting　2015/09/15
World of oxide electronics International-presentation

Tohoku University Campus Asia Summer School 2015　2015/08/27
Reductive solid phase epitaxy and physical properties of layered Y₂O₂Bi Thin Film with Bi^2- square net International-presentation

Ryosuke Sei, Daichi Oka, Tomoteru Fukumura, Tetsuya Hasegawa

Tohoku University Campus Asia Summer School 2015　2015/08/27
Nonequilibrium Synthesis of Solid State Yttrium Monoxide International-presentation

Kenichi Kaminaga, Ryosuke Sei, Daichi Oka, Tomoteru. Fukumura, Tetsuya Hasegawa

Tohoku University Campus Asia Summer School 2015　2015/08/27
Thin film growth of HP-PdF₂ type RuO₂ International-presentation

Dai Kutsuzawa, Daichi Oka, Tomoteru Fukumura, Tetsuya Hasegawa

Tohoku University Campus Asia Summer School 2015　2015/08/27
Observation of magnetic domain structure and improvement of magnetization in anatase (Ti, Co)O₂ thin films International-presentation

Thantip S. Krasienapibal, Tomoteru Fukumura, Tetsuya Hasegawa

21th ZESTY NETWORK Seminar　2015/07/08
金属ドープ酸化物半導体：室温強磁性の発現と局所構造の役割

活性サイト科学春の学校３Ｄ活性サイト研究のための分光・回折技術の基礎と応用　2015/05/30
High ionic conductivity and its control via epitaxial strain in Li_0.33La_0.56TiO₃ thin films International-presentation

Jie Wei, Daisuke Ogawa, Tomoteru Fukumura, Yasushi Hirose, Tetsuya Hasegawa

E-MRS Spring Meeting　2015/05/11
Novel approach for controlling optical properties of anatase TiO₂ : Solid-solution with anatase TaON International-presentation

Atsushi Suzuki, Yasushi Hirose, Shoichiro Nakao, Tomoteru Fukumura, Tetsuya Hasegawa

E-MRS Spring Meeting　2015/05/11
透明磁石の物質探索：強磁性を電圧で制御する

東北大学理学研究科化学専攻一般雑誌会講演会　2015/04/15
Reductive Solid Phase Epitaxy of Layered Y₂O₂Bi Thin Film with Bi^2-Square Net and its Electronic Transport Properties International-presentation

Ryosuke Sei, Tomoteru Fukumura, Tetsuya Hasegawa

MRS Spring Meeting　2015/04
Electric Field Control of Room Temperature Ferromagnetism in Co-Doped TiO₂ International-presentation

CIMTEC 2010 - 12th International Conference on Modern Materials and Technologies　2010/06/06
強磁性半導体EuOエピタキシャル薄膜の磁気輸送特性

山崎高志, 福村知昭, 上野和紀, 塚﨑敦, 川崎雅司

第119回東北大学金属材料研究所講演会　2010/05/28
Ultrafast carrier dynamics of delafossite-type CuScO₂ epitaxial thin films

F. Liu, T. Makino, H. Hiraga, T. Fukumura, Y. Kong, M. Kawasaki

第119回東北大学金属材料研究所講演会　2010/05/28
Electrical Control of Room Temperature Ferromagnetism in Magnetic Oxide Semiconductor International-presentation

International Conference on Superconductivity and Magnetism, ICSM2010　2010/04/25
Coexistence of excitonic and magnetic properties in natural superlattices composed of Cu₂O and transition metal oxides International-presentation

H. Hiraga, T. Makino, T. Fukumura, A. Ohtomo, M. Kawasaki

The 2010 WPI-AIMR Annual Workshop　2010/03/25
デラフォサイト型CuTMO₂薄膜の励起子物性

牧野哲征, 劉富才, 平賀広貴, 福村知昭, 大友明, 孔勇発, 川崎雅司

日本物理学会第65回年次大会　2010/03/20
Indication of intrinsic ferromagnetism in anatase Ti_1-xCo_xO_2-δ thin films: An x-ray magnetic circular dichroism study

V. R. Singh, T. Kataoka, Y. Yamazaki, A. Fujimori, F.-H. Chang, H.-J. Lin, D.-J. Huang, C. T. Chen, Y. Yamada, T. Fukumura, M. Kawasaki

日本物理学会第65回年次大会　2010/03/20
室温強磁性半導体Ti_1-xCo_xO_2-δの電界誘起強磁性

山田良則, 上野和紀, 福村知昭, 袁洪涛, 下谷秀和, 岩佐義宏, 川崎雅司

2010年春季第57回応用物理学関係連合講演会　2010/03/17
Conducting polymer Schottky contact on ZnO with interfacial self-assembled monolayer

R. Y. Gunji, H. Hiraga, A. Ohtomo, T. Makino, T. Fukumura, M. Kawasaki

グローバルCOEプログラム「材料インテグレーション国際教育研究拠点」2009年度若手研究者研究報告会　2010/03/09
Electric field control of room temperature ferromagnetism in anatase Ti_1-xCo_xO_2-d

Y. Yamada, K. Ueno, T. Fukumura, H. T. Yuan, H. Shimotani, Y. Iwasa, M. Kawasaki

グローバルCOEプログラム「材料インテグレーション国際教育研究拠点」2009年度若手研究者研究報告会　2010/03/09
室温強磁性半導体CoドープTiO₂における強磁性の膜厚効果

中野匡規, 福村知昭, 山田良則, 上野和紀, 川崎雅司

東北大学研究所連携プロジェクト第3期平成21年度成果報告会-ヒューマンサイエンス＆テクノロジー　2010/02/08
CoドープTiO₂の異常ホール効果の電界制御

福村知昭, 山田良則, 上野和紀, 下谷秀和, 岩佐義宏, 川崎雅司

特定領域研究「スピン流の創出と制御」平成２１年度研究会　2010/01/13
CoドープTiO₂の表面における強磁性の抑制

中野匡規, 福村知昭, 山田良則, 上野和紀, 川崎雅司

第14回半導体スピン工学の基礎と応用 PASPS‐14　2009/12/21
透明スピントロニクス

第３回東北大学G-COE研究会　2009/12/18

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「金属錯体の固体物性科学最前線―錯体化学と固体物性物理と生物物性の連携新領域創成を目指して―」
デラフォサイト型遷移金属酸化物エピタキシャル薄膜の作製と特異な励起子物性

平賀広貴, 牧野哲征, 福村知昭, 大友明, 大久保昭, 木村久道, 川崎雅司

第118回東北大学金属材料研究所講演会　2009/11/26
カルボキシル結合基を有するフッ素系自己組織化単分子膜の酸化物基板上への形成

郡司遼佑, 平賀広貴, 大友明, 牧野哲征, 福村知昭, 川崎雅司

第118回東北大学金属材料研究所講演会　2009/11/26
強磁性半導体EuO薄膜の磁気輸送特性

山崎高志, 福村知昭, 上野和紀, 塚﨑敦, 川崎雅司

第118回東北大学金属材料研究所講演会　2009/11/26
アナターゼ型Ti_1-xCo_xO_2-の室温強磁性に対する電気二重層を用いた電界効果

山田良則, 上野和紀, 福村知昭, 下谷秀和, 岩佐義宏, 川崎雅司

第118回東北大学金属材料研究所講演会　2009/11/26
Electric field effect on room temperature ferromagnetism in a magnetic oxide semiconductor International-presentation

T. Fukumura, Y. Yamada, K. Ueno, H. Shimotani, Y. Iwasa, M. Kawasaki

RIEC-CNSI Workshop on Nanoelectronics, Spintronics and Photonics　2009/10/22
Excitonic and magnetic properties in natural superlattices composed of Cu₂O and transition metal oxides International-presentation

H. Hiraga, T. Makino, T. Fukumura, A. Ohtomo, M. Kawasaki

RIEC-CNSI Workshop on Nanoelectronics, Spintronics and Photonics　2009/10/22
High throughput combinatorial materials exploration for advanced magneto-electronics International-presentation

T. Fukumura

SSDM (International Conference on Solid State Devices and Materials)　2009/10/06
Optical and magnetic properties of CuMnO₂ epitaxial thin films International-presentation

H. Hiraga, T. Fukumura, A. Ohtomo, T. Makino, M. Kawasaki

16th International Workshop on Oxide Electronics　2009/10/04
光照射によるTi_1-xCo_xO₂の電子状態変化III

山下直飛人, 須田山貴亮, 田久保耕, 溝川貴司, 山田良則, 豊崎秀海, 福村知昭, 川崎雅司

日本物理学会2009年秋季大会　2009/09/25
Transparent oxide spintronics International-presentation

T. Fukumura, Y. Yamada, K. Ueno, H. Shimotani, Y. Iwasa, M. Kawasaki

Japan-Korea Asian Core Program General Meeting / Global COE Program International Conference "Interdisciplinary Science of Nanomaterials"　2009/09/24

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Best Presentation Award
酸化物基板上への高極性カルボン酸系SAM の形成

郡司遼佑, 平賀広貴, 大友明, 牧野哲征, 福村知昭, 川崎雅司

2009年秋季第70回応用物理学会学術講演会　2009/09/08
PLD 法で作製したEuO 薄膜の電気・磁気的性質

山崎高志, 福村知昭, 上野和紀, 塚﨑敦, 川崎雅司

2009年秋季第70回応用物理学会学術講演会　2009/09/08
デラフォサイト型CuTMO₂薄膜のエピタキシャル成長と光学的性質

平賀広貴, 福村知昭, 大友明, 牧野哲征, 大久保昭, 木村久道, 川崎雅司

2009年秋季第70回応用物理学会学術講演会　2009/09/08
アナターゼ型Ti_1-xCo_xO_2-の室温強磁性の電界制御

山田良則, 上野和紀, 福村知昭, 下谷秀和, 岩佐義宏, 川崎雅司

2009年秋季第70回応用物理学会学術講演会　2009/09/08
Transparent polymer Schottky contact toward ZnO-based electronic devices International-presentation

M. Nakano, A. Tsukazaki, A. Ohtomo, T. Makino, K. Ueno, S. Akasaka, H. Yuji, K. Nakahara, T. Fukumura, M. Kawasaki

Swiss Workshop on Materials with Novel Electronic Properties　2009/08/26
CoドープTiO₂の室温強磁性の電界効果

福村知昭, 山田良則, 上野和紀, 下谷秀和, 岩佐義宏, 川崎雅司

特定領域研究「スピン流の創出と制御」平成２１年度研究会　2009/08/09
Room temperature ferromagnetic semiconductor Co-doped TiO₂ films grown on glass by sputtering method International-presentation

T. Fukumura, T. Yamasaki, Y. Yamada, K. Ueno, M. Nakano, T. Makino, M. Kawasaki

The 14th International Conference on Modulated Semiconductor structures (MSS-14)　2009/07/19
Electric field control of room temperature ferromagnetism in cobalt-doped TiO₂ International-presentation

T. Fukumura, Y. Yamada, K. Ueno, M. Nakano, H. Shimotani, Y. Iwasa, M. Kawasaki

Fifth Intern'l School and Conference on Spintronics and Quantum Information Technology (SPINTECH 5)　2009/07/07
デラフォサイト型遷移金属酸化物エピタキシャル薄膜の作製と物性評価

平賀広貴, 福村知昭, 大友明, 牧野哲征, 大久保昭, 木村久道, 川崎雅司

第117回東北大学金属材料研究所講演会　2009/05/14
アナターゼ型Ti_1-xCo_xO_2-dの室温強磁性の電界制御

山田良則, 上野和紀, 福村知昭, 中野匡規, 下谷秀和, 岩佐義宏, 川崎雅司

第117回東北大学金属材料研究所講演会　2009/05/14
レーザー分子線エピタキシー法を用いた強磁性半導体EuO薄膜の作製

山崎高志, 福村知昭, 上野和紀, 塚﨑敦, 大久保昭, 木村久道, 川崎雅司

第117回東北大学金属材料研究所講演会　2009/05/14
酸化物基板上へのカルボン酸系SAMの形成

郡司遼佑, 平賀広貴, 中野匡規, 大友明, 牧野哲征, 福村知昭, 川崎雅司

第117回東北大学金属材料研究所講演会　2009/05/14
Exploration of Functional Inorganic Materials with Combinatorial Thin Film Library International-presentation

T. Fukumura

MRS Spring Meeting　2009/04/13
High throughput mapping of magneto-optical properties in spinel ferrite (Zn,Co)Fe₂O₄ solid solution with a composition-spread approach International-presentation

Y. Iwasaki, T. Fukumura, H. Kimura, A. Ohkubo, T. Hasegawa, Y. Hirose, T. Makino, K. Ueno, M. Kawasaki

MRS Spring Meeting　2009/04/13
アナターゼ型Ti_1-xCo_xO_2-dの異常ホール効果の電界制御

山田良則, 上野和紀, 福村知昭, 中野匡規, 下谷秀和, 岩佐義宏, 川崎雅司

第56回応用物理学関係連合講演会　2009/03/30
スピネルフェライト(Zn,Co)Fe₂O₄コンポジションスプレッド薄膜の磁気光学特性

岩崎洋介, 福村知昭, 木村久道, 大久保昭, 長谷川哲也, 廣瀬靖, 牧野哲征, 上野和紀, 川崎雅司

第56回応用物理学関係連合講演会　2009/03/30
デラフォサイト型遷移金属酸化物エピタキシャル薄膜の作製と物性評価

平賀広貴, 岩崎洋介, 福村知昭, 大友明, 牧野哲征, 大久保昭, 木村久道, 川崎雅司

第56回応用物理学関係連合講演会　2009/03/30
酸化物基板上へのステアリン酸SAM の形成

郡司遼佑, 平賀広貴, 中野匡規, 大友明, 牧野哲征, 福村知昭, 川崎雅司

第56回応用物理学関係連合講演会　2009/03/30
スパッタ製膜Ti_1-xCo_xO_2-d薄膜の磁気光学性能指数の評価

後藤俊良, 清水大雅, 山崎高志, 福村知昭, 川崎雅司

第56回応用物理学関係連合講演会　2009/03/30
光照射によるTi_1-xCo_xO₂の電子状態変化II

山下直飛人, 須田山貴亮, 田久保耕, 溝川貴司, 山田良則, 豊崎秀海, 福村知昭, 川崎雅司

第64回年次大会日本物理学会2009年年次大会　2009/03/27
Magneto-electric and magneto-optical properties in room temperature ferromagnetic semiconductor Ti_1-xCo_xO_2-d thin films on glass

T. Yamasaki, T. Fukumura, Y. Yamada, M. Nakano, K. Ueno, T. Makino, M. Kawasaki

グローバルCOEプログラム「材料インテグレーション国際教育研究拠点」2008年度若手研究者研究報告会　2009/03/09
Self-assembled stearic acid monolayer on oxide surfaces

R. Y. Gunji, H. Hiraga, M. Nakano, A. Ohtomo, T. Makino, T. Fukumura, M. Kawasaki

グローバルCOEプログラム「材料インテグレーション国際教育研究拠点」2008年度若手研究者研究報告会　2009/03/09
XMCD study of ferromagnetic semiconductor anatase Ti_1-xCo_xO_2-d thin films International-presentation

V. R. Singh, Y. Sakamoto, T. Kataoka, Y. Yamazaki, A. Fujimori, F.-H. Chang, L. Lee, H.-J. Lin, D. J. Huang, C. T. Chen, Y. Yamada, K. Ueno, T. Fukumura, M. Kawasaki

AIST-RIKEN Joint WS on "Emergent Phenomena of Correlated Materials"　2009/03/04
Optical properties of quasi-one-dimensional oxide thin-films: Sr₂CuO₃, Ca₂CuO₃, Sr₂NiO₃, Sr₂CoO₃ and their solid solutions International-presentation

T. Makino, T. Fukumura, Y. Segawa, M. Kawasaki

2009 March Annual Workshop ofWPI-AIMR　2009/03/02
Epitaxial growth and properties of delafossite (CuTMO₂) thin films on MgAl₂O₄ and alpha-Al₂O₃ substrates International-presentation

H. Hiraga, T. Fukumura, T. Makino, A. Ohtomo, M. Kawasaki

2009 March Annual Workshop ofWPI-AIMR　2009/03/02
Self-assembled octadecanoic acid monolayer on oxide surfaces International-presentation

R. Y. Gunji, H. Hiraga, M. Nakano, A. Ohtomo, T. Makino, T. Fukumura, M. Kawasaki

Tohoku - NTU Research Student Workshop on Materials Integration for Health, Energy & Better Environment　2009/02/10
Ferromagnetic semiconductor Ti_1-xCo_xO_2-d sputter-grown films International-presentation

T. Yamasaki, T. Fukumura, Y. Yamada, M. Nakano, K. Ueno, T. Makino, M. Kawasaki

Tohoku - NTU Research Student Workshop on Materials Integration for Health, Energy & Better Environment　2009/02/10
CoドープTiO₂の強磁性制御にむけて

福村知昭, 山田良則, 山崎高志, 中野匡規, 上野和紀, 牧野哲征, 川崎雅司

PASPS13　2009/01/27
磁性半導体Ti_1-xCo_xO_2-dの軟X 線磁気円二色性による研究

坂本勇太, 小林正起, 片岡隆史, 山崎陽, 藤森淳, 竹田幸治, 大河内拓雄, 岡根哲夫, 斉藤祐児, 山上浩志, F. -H. Chang, L. Lee, H. -J. Lin, D. -J. Huang, C. T. Chen, 豊崎秀海, 福村知昭, 川崎雅司

第22回放射光学会合同シンポジウム　2009/01/09
スパッタ製膜Ti_1-xCo_xO_2-d薄膜の磁気光学性能指数の評価

後藤俊良, 清水大雅, 山崎高志, 福村知昭, 川崎雅司

特定領域研究「スピン流の創出と制御」平成20 年度成果報告会　2009/01/07
CoドープTiO₂の光伝導特性

山田良則, 福村知昭, 中野匡規, 上野和紀, 牧野哲征, 川崎雅司

特定領域研究「スピン流の創出と制御」平成20 年度成果報告会　2009/01/07
CoドープTiO₂の強磁性と電気伝導性の相関

福村知昭, 山田良則, 山崎高志, 中野匡規, 上野和紀, 川崎雅司

特定領域研究「スピン流の創出と制御」平成20 年度成果報告会　2009/01/07
Ti_1-xCo_xO_2-dのX線磁気円二色性による研究

坂本勇太, 片岡隆史, 小林正起, 山崎陽, 藤森淳, F.-H. Chang, L. Lee, H.-J. Lin, D.-J. Huang, C. T. Chen, 豊崎秀海, 福村知昭, 川崎雅司

特定領域研究「スピン流の創出と制御」平成20 年度成果報告会　2009/01/07
室温強磁性酸化物半導体Ti_1-xCo_xO_2-dの光伝導特性

山田良則, 福村知昭, 上野和紀, 中野匡規, 山崎高志, 牧野哲征, 川崎雅司

第116回東北大学金属材料研究所講演会　2008/11/27
PEDOT:PSSショットキー電極を用いたZnO系電子デバイス

中野匡規, 塚崎敦, 上野和紀, 牧野哲征, 大友明, 福村知昭, 赤坂俊輔, 湯地洋行, 中原健, 川崎雅司

第116回東北大学金属材料研究所講演会　2008/11/27
層状酸化物CuMnO₂エピタキシャル薄膜の作製と物性

平賀広貴, 岩崎洋介, 福村知昭, 川崎雅司, 大久保昭, 木村久道

第116回東北大学金属材料研究所講演会　2008/11/27
O極性Mg_xZn_1-xOショットキー接合における障壁高さのMg組成依存性

小野寺拓人, 郡司遼佑, 塚崎敦, 中野匡規, 牧野哲征, 大友明, 福村知昭, 川崎雅司

第116回東北大学金属材料研究所講演会　2008/11/27
導電性高分子/極性分子膜/Nb:TiO₂のショットキー接合

郡司遼佑, 中野匡規, 塚崎敦, 大友明, 福村知昭, 川崎雅司

第116回東北大学金属材料研究所講演会　2008/11/27
Soft X-ray magnetic circular dichroism study of the ferromagnetic semiconductor Ti_1-xCo_xO_2-d thin films International-presentation

Y. Sakamoto, T. Kataoka, M. Kobayashi, Y. Yamazaki, A. Fujimori, F.-H. Chang, L. Lee, H.-J. Lin, D.-J. Huang, C.T. Chen, H. Toyosaki, T. Fukumura, M. Kawasaki

The 9th Korea-Japan-Taiwan Symposium on Strongly Correlated Electron Systems Symposium　2008/11/20
導電性高分子／酸化亜鉛ショットキー接合のバンドアライメント

中野匡規, 塚崎敦, 上野和紀, 大友明, 福村知昭, 赤坂俊輔, 中原健, 田辺哲弘, 神澤公, 川崎雅司

東北大学金属材料研究所ワークショップ「酸化物ナノ構造の基礎と応用－化学と物理の融合」　2008/11/17
CoドープTiO₂薄膜のスパッタ合成と物性

福村知昭

平成20年度上半期元素戦略プロジェクト講演会　2008/11/07
ワイドギャップ強磁性半導体

福村知昭

「革新的次世代デバイスを目指す材料とプロセス」第３回領域会議および合同発表会　2008/10/30
Spatial Distribution of a Two-Dimensional Electron Gas in ZnO / Mg_xZn_1-xO Heterostructure Probed by Conducting Polymer Schottky Contact International-presentation

M. Nakano, A. Tsukazaki, R. Y. Gunji, K. Ueno, A. Ohtomo, T. Fukumura, M. Kawasaki

NMDC 2008 (The IEEE Nanotechnology Materials and Devices Conference)　2008/10/20
Advanced ceramics for future electronics International-presentation

T. Fukumura

UK-Japan Frontiers of Science Symposium 2008　2008/10/04
Molecular beam epitaxy of ZnO based heterostructures for advanced optoelectronic devices International-presentation

K. Nakahara, S. Akasaka, H. Yuji, K. Tamura, T. Fujii, Y. Nishimoto, D. Takamizsu, A. Sasaki, T. Tanabe, A. Kamisawa, H. Amaike, T. Onuma, S. F. Chichibu, M. Nakano, T. Fukumura, A. Tsukazaki, A. Ohtomo, M. Kawasaki

ISCS (The International Symposium on Compound Semiconductors)　2008/09/21
光照射によるTi_1-xCo_xO₂の電子状態変化

山下直飛人, 須田山貴亮, 田久保耕, 溝川貴司, 豊崎秀海, 福村知昭, 川崎雅司

日本物理学会2008年年次・秋季大会　2008/09/20
磁性半導体Ti_1-xCo_xO_2-d薄膜のX線磁気円二色性の組成およびキャリア濃度依存性

坂本勇太, 小林正起, 片岡隆史, 宋敬錫, 藤森淳, F.-H. Chang, L. Lee, H.-J. Lin, D. J. Huang, C. T. Chen, 豊崎秀海, 福村知昭, 川崎雅司

日本物理学会2008年年次・秋季大会　2008/09/20
導電性高分子/極性分子膜/酸化物のショットキー特性

郡司遼佑, 中野匡規, 塚崎敦, 大友明, 福村知昭, 川崎雅司

応物第６９回応用物理学関係連合講演会　2008/09/02
PEDOT:PSS / ZnO ショットキー接合を利用した高性能紫外線検出器

中野匡規, 牧野哲征, 郡司遼佑, 上野和紀, 大友明, 福村知昭, 湯地洋行, 赤坂俊輔, 中原健, 川崎雅司

応物第６９回応用物理学関係連合講演会　2008/09/02
PEDOT:PSS ショットキー電極によるMg_xZn_1-xO / ZnO ヘテロ界面の二次元伝導制御

中野匡規, 塚崎敦, 上野和紀, 郡司遼佑, 大友明, 福村知昭, 赤坂俊輔, 中原健, 川崎雅司

応物第６９回応用物理学関係連合講演会　2008/09/02
アナターゼ型Ti_1-xCo_xO_2-d薄膜における電気伝導の光照射効果

山田良則, 福村知昭, 上野和紀, 中野匡規, 山崎高志, 牧野哲征, 川崎雅司

応物第６９回応用物理学関係連合講演会　2008/09/02
導電性高分子を金属電極に用いたO極性Mg_xZn_1-xO ショットキー接合の作製と評価

小野寺拓人, 郡司遼佑, 塚崎敦, 中野匡規, 牧野哲征, 大友明, 福村知昭, 川崎雅司

応物第６９回応用物理学関係連合講演会　2008/09/02
Co-doped TiO₂ thin film grown on glass substrate for transparent spintronics International-presentation

T. Yamasaki, T. Fukumura, M. Nakano, K. Ueno, Y. Yamada, M. Kawasaki

Fifth International Conference on Physics and Applications of Spin-related Phenomena in Semiconductors (PASPS-V)　2008/08/03
コバルトドープ二酸化チタンの異常ホール効果の電界制御

福村知昭

第２回特定領域研究「スピン流」成果報告会　2008/07/22
High T_C ferromagnetic diluted oxide: cobalt-doped TiO₂ International-presentation

T. Fukumura, K. Ueno, T. Yamasaki, Y. Yamada, M. Nakano, M. Kawasaki

INDO-JAPAN Workshop on Novel Magnetic Ordering in Nanostructured Materials　2008/06/10
表面保護を用いたPEDOT:PSS/-c面ZnOショットキー接合

郡司遼佑, 中野匡規, 塚崎敦, 大友明, 福村知昭, 川崎雅司

第115回東北大学金属材料研究所講演会　2008/05/13
PEDOT:PSS / ZnOショットキー接合の評価と電子デバイス応用

中野匡規, 塚崎敦, 上野和紀, 郡司遼佑, 大友明, 福村知昭, 川崎雅司

第115回東北大学金属材料研究所講演会　2008/05/13
アナターゼ構造 Ti_1-xCo_xO_2-dの高温異常ホール効果

上野和紀, 福村知昭, 山田良則, 中野匡規, 山崎高志, 川崎雅司

第115回東北大学金属材料研究所講演会　2008/05/13
Ti_1-xCo_xO_2-d層を用いた磁気光学フォトニック結晶の巨大磁気光学効果

山崎高志, 福村知昭, 中野匡規, 上野和紀, 山田良則, 川崎雅司

第115回東北大学金属材料研究所講演会　2008/05/13
アナターゼ型Ti_1-xCo_xO_2-d薄膜における強磁性-常磁性相境界の磁性

山田良則, 福村知昭, 上野和紀, 中野匡規, 山崎高志, 川崎雅司

第115回東北大学金属材料研究所講演会　2008/05/13
PEDOT:PSS / ZnOショットキー接合界面の評価及びヘテロ構造への適用

中野匡規, 塚崎敦, 郡司遼佑, 上野和紀, 大友明, 福村知昭, 湯地洋行, 中原健, 川崎雅司

２００８年春季第５５回応用物理学関係連合講演会　2008/03/27
PEDOT:PSS / ZnOショットキー接合のフォトダイオード特性

中野匡規, 牧野哲征, 郡司遼佑, 上野和紀, 大友明, 福村知昭, 湯地洋行, 中原健, 川崎雅司

２００８年春季第５５回応用物理学関係連合講演会　2008/03/27
PEDOT:PSS/APTEOS/-c面ZnOショットキー接合

郡司遼佑, 中野匡規, 塚崎敦, 大友明, 福村知昭, 川崎雅司

２００８年春季第５５回応用物理学関係連合講演会　2008/03/27
ボロンドープダイヤモンド薄膜のボルテックス観察

岡崎壮平, 立木昌, 福村知昭, 川崎雅司, 野島勉, 入山慎吾, 岡田竜介, 川原田洋, 鯉沼秀臣

２００８年春季第５５回応用物理学関係連合講演会　2008/03/27
アナターゼTi1-xCoxO2-δ薄膜における強磁性-常磁性相境界の磁性

山田良則, 福村知昭, 上野和紀, 中野匡規, 山崎高志, 川崎雅司

２００８年春季第５５回応用物理学関係連合講演会　2008/03/27
アナターゼ構造 Ti1-xCoxO2-δの高温異常ホール効果

上野和紀, 福村知昭, 山田良則, 中野匡規, 山崎高志, 川崎雅司

２００８年春季第５５回応用物理学関係連合講演会　2008/03/27
スパッタ法で作製したTi1-xCoxO2-δ薄膜の磁気光学効果

山崎高志, 福村知昭, 中野匡規, 上野和紀, 山田良則, 川崎雅司

２００８年春季第５５回応用物理学関係連合講演会　2008/03/27
強磁性半導体Ti1-xCoxO2-δをチャネルとした電気二重層トランジスタ

上野和紀, 福村知昭, 山田良則, 中野匡規, 山崎高志, 下谷秀和, 岩佐義宏, 川崎雅司

２００８年春季第５５回応用物理学関係連合講演会　2008/03/27
磁性半導体Ti_1-xCo_xO_2-dのX線磁気円二色性

坂本勇太, 小林正起, 片岡隆史, 宋敬錫, 藤森淳, F.-H. Chang, L. Lee, H.-J. Lin, D.-J. Huang, C. T. Chen, 豊崎秀海, 福村知昭, 川崎雅司

2008年日本物理学会秋季大会　2008/03/22
Conducting polymer / ZnO Schottky junctions and their applications

Masaki Nakano, Atsushi Tsukazaki, Kazunori Ueno, Ryosuke Y. Gunji, Akira Ohtomo, Tomoteru Fukumura, Masashi Kawasaki

グローバルCOEプログラム「材料インテグレーション国際教育研究拠点」若手研究者報告会　2008/03/14
PEDOT:PSS Schottky contact on protected -c surface of ZnO by silane-coupling agent

Ryosuke Y. Gunji, Masaki Nakano, Atsushi Tsukazaki, Akira Ohtomo, Tomoteru Fukumura, Masashi Kawasaki

グローバルCOEプログラム東北大学「材料インテグレーション国際教育研究拠点」若手研究者報告会　2008/03/14
酸化物・有機物複合光デバイス

中野匡規, 福村知昭, 川崎雅司

文部科学省大学院教育改革支援プログラム「理学の実践と応用プログラム」（新大学院ＧＰ）主催６専攻合同シンポジウム　2008/02/20
酸化物・有機物複合光デバイス

中野匡規, 福村知昭, 川崎雅司

文部科学省大学院教育改革支援プログラム「理学の実践と応用プログラム」（新大学院ＧＰ）主催６専攻合同シンポジウム「ヤングブレインズの連携による学際的研究の創出」　2008/02/20
スパッタリング法による透明強磁性酸化物半導体CoドープTIO2薄膜の作製と物性

福村知昭, 山崎高志, 中野匡規, 上野和紀, 川崎雅司

真空協会スパッタリング及びプラズマプロセス技術部会(SP部会)第107回定例研究会　2008/02/19
Ferromagnetic oxide semiconductor toward transparent spintronics International-presentation

Tomoteru Fukumura, K. Ueno, M. Nakano, T. Yamasaki, Y. Yamada, M. Kawasaki

WPI & IFCAM Joint Workshop “Challenge of Interdisciplinary Materials Science to Technological Innovation of the 21st Century”　2008/02/18
Conducting polymer / ZnO Schottky junction toward transparent oxide electronics International-presentation

M. Nakano, A. Tsukazaki, K. Ueno, R. Y. Gunji, A. Ohtomo, T. Fukumura, M. Kawasaki

WPI & IFCAM Joint Workshop “Challenge of Interdisciplinary Materials Science to Technological Innovation of the 21st Century”　2008/02/18
室温強磁性酸化物半導体CoドープTiO2の最近の展開

福村知昭, 豊崎秀海, 上野和紀, 中野匡規, 山崎高志, 山田良則, 川崎雅司

東工大応用セラミックス研究所特定研究テーマ研究会　2008/01/28
X-ray Magnetic Circular Dichroism Study of Diluted Magnetic Semiconductors Ti1-xCoxO2-d Thin Films

Y. Sakamoto, M. Kobayashi, T. Kataoka, G. S. Song, A. Fujimori, H. Toyosaki, T. Fukumura, M. Kawasaki

第12回「半導体スピン工学の基礎と応用」研究会(PASPS12)　2007/12/20
High temperature measurements of anomalous Hall Effect in anatase Ti1-xCoxO2-δ

K. Ueno, Y. Yamada, H. Toyosaki, M. Nakano, T. Yamasaki, T. Fukumura, M. Kawasaki

第12回「半導体スピン工学の基礎と応用」研究会(PASPS12)　2007/12/20
有機金属 / ZnOショットキー界面の評価及びヘテロ構造への適用

中野匡規, 塚﨑敦, 郡司遼佑, 上野和紀, 大友明, 福村知昭, 川﨑雅司

金研ワークショップ「酸化亜鉛半導体テクノロジーの進歩」　2007/12/20
PEDOT:PSS / ZnO Schottky junction International-presentation

M. Nakano, A. Tsukazaki, R. Y. Gunji, K. Ueno, A. Ohtomo, T. Fukumura, M. Kawasaki

The 2nd Korea University / IMR Student Exchange Seminar　2007/12/17
PEDOT:PSS Schottky contact on -c surface of ZnO with silane-coupling treatment International-presentation

R. Y. Gunji, M. Nakano, A. Tsukazaki, A. Ohtomo, T. Fukumura, M. Kawasaki

The 2nd Korea University / IMR Student Exchange Seminar　2007/12/17
スパッタ法で作製したルチル型Ti1-xCoxO2-δ薄膜の磁気・電気特性

山崎高志, 福村知昭, 中野匡規, 上野和紀, 山田良則, 川崎雅司

第114回東北大学金属材料研究所講演会　2007/11/29
Conducting polymer / oxide semiconductor Schottky junctions International-presentation

M. Nakano, T. Fukumura, K. Ueno, A. Tsukazaki, R. Y. Gunji, Y. Yamada, A. Ohtomo, M. Kawasaki

2007 MRS Fall Meeting　2007/11/26
Polymer Schottky Contact on Polar ZnO Surfaces International-presentation

R. Y. Gunji, M. Nakano, A. Tsukazaki, A. Ohtomo, T. Fukumura, M. Kawasaki

2007 MRS Fall Meeting　2007/11/26
Anomalous Hall Effect in anatase Ti1-xCoxO2 above room temperature International-presentation

K. Ueno, T. Fukumura, H. Toyosaki, M. Nakano, T. Yamasaki, Y. Yamada, M. Kawasaki

52nd Magnetism and Magnetic Materials Conference　2007/11/05
Spin-related phenomena of TiO2:Co International-presentation

T. Fukumura, H. Toyosaki, K. Ueno, M. Nakano, M. Kawasaki

The 34th International Symposium on Compound Semiconductors　2007/10/15
On ferromagnetism in magnetic oxide semiconductors International-presentation

T. Fukumura, H. Toyosaki, K. Ueno, M. Nakano, T. Yamasaki, M. Kawasaki

JSPS Japan-Poland Seminar on Magnetic Semiconductors　2007/09/27
THz時間領域分光法による超伝導NbN薄膜の磁場下伝導度測定

池辺洋平, 島野亮, 池田将洋, 福村知昭, 川崎雅司

日本物理学会 2007年秋季大会　2007/09/21
B1型超伝導ZrN薄膜のテラヘルツ分光

森まゆみ, 森龍也, Y.B.Zhu, 福村知昭, 川崎雅司, 豊田直樹

日本物理学会 2007年秋季大会　2007/09/21
透明で電気を流す強磁性半導体：CoドープTiO2

福村知昭, 豊崎秀海, 上野和紀, 中野匡規, 山崎高志, 山田良則, 川崎雅司

エレクトロニクス技術広域分野研究交流会　2007/09/21
導電性高分子を金属電極に用いた-c面ZnO ショットキー接合の作製と電気特性

郡司遼佑, 中野匡規, 塚崎敦, 大友明, 福村知昭, 川崎雅司

第68回応用物理学関係連合講演会　2007/09/04
スパッタ法で作製したルチル型Ti1-xCoxO2-δ薄膜の異常ホール効果

山崎高志, 福村知昭, 中野匡規, 上野和紀, 山田良則, 川崎雅司

第68回応用物理学関係連合講演会　2007/09/04
導電性高分子/ 酸化物半導体ショットキー接合の温度特性

中野匡規, 福村知昭, 上野和紀, 塚崎敦, 郡司遼佑, 山田良則, 大友明, 川崎雅司

第68回応用物理学関係連合講演会　2007/09/04
CoドープTiO2を用いた磁気伝導デバイスの可能性

福村知昭, 豊崎秀海, 上野和紀, 中野匡規, 山崎高志, 川崎雅司

第68回応用物理学関係連合講演会　2007/09/04
Magnetic oxide semiconductors toward room temperature spintronics International-presentation

T. Fukumura, H. Toyosaki, K. Ueno, M. Nakano, T. Yamasaki, M. Kawasaki

The third Euro-Asian Symposium on Magnetism, EASTMAG-2007　2007/08/23
強磁性半導体の異常ホール効果のスケーリング

福村知昭, 豊崎秀海, 上野和紀, 中野匡規, 山崎高志, 川崎雅司

ボトムアップ若手の会第二回研究会　2007/07/12
導電性高分子を金属電極とするショットキー接合の作製と評価

中野匡規, 福村知昭, 上野和紀, 塚崎敦, 郡司遼佑, 大友明, 川崎雅司

第113回東北大学金属材料研究所講演会　2007/05/24
Highly crystalline ZrN superconducting thin film on c-GaN layer at low temperature by pulsed laser deposition method

Y. B. Zhu, H. Ikeda, Y. Murakami, A, Tsukazaki, T. Fukumura, M. Kawasaki

第113回東北大学金属材料研究所講演会　2007/05/24
コンビナトリアルスパッタ法によるエピタキシャルTiO2薄膜の作製

山崎高志, 福村知昭, 豊崎秀海, 中野匡規, 上野和紀, 川崎雅司

第113回東北大学金属材料研究所講演会　2007/05/24
導電性高分子を用いたZnOショットキー接合の作製と電気特性

郡司遼佑, 中野匡規, 塚崎敦, 大友明, 福村知昭, 川崎雅司

第113回東北大学金属材料研究所講演会　2007/05/24
CoドープTiO2の異常ホール伝導率のスケーリング

福村知昭, 豊崎秀海, 上野和紀, 中野匡規, 山崎高志, 川崎雅司

第54回応用物理学関係連合講演会　2007/03/27
走査型マイクロ波顕微鏡を用いた低温での薄膜導電率の定量評価

岡崎壮平, 岡崎紀明, 菅谷英生, 西村潤, 福村知昭, 川崎雅司, 一杉太郎, 島田敏宏, 長谷川哲也

2007年春季第54回応用物理学関係連合講演会　2007/03/27
PLD法を用いた高品質ZrN超伝導薄膜の低温成長

朱亜彬, 池田将洋, 塚崎敦, 福村知昭, 川崎雅司

2007年春季第54回応用物理学関係連合講演会　2007/03/27
スパッタ法を用いたエピタキシャルTiO2薄膜のハイスループット作製

山崎高志, 福村知昭, 豊崎秀海, 中野匡規, 上野和紀, 川崎雅司

2007年春季第54回応用物理学関係連合講演会　2007/03/27
導電性高分子/酸化物半導体ショットキー接合

中野匡規, 福村知昭, 上野和紀, 塚崎敦, 郡司遼祐, 大友明, 川崎雅司

2007年春季第54回応用物理学関係連合講演会　2007/03/27
Improved efficiency of organic light emitting device with TiO2 anode International-presentation

Tomoteru Fukumura, Masaki Nakano, Hidemi Toyosaki, Kazunori Ueno, Masashi Kawaski

The Fourth International Conference on Molecular Electronics and Bioelectronics (M&BE4)　2007/03/14
A scaling behavior of anomalous Hall effect for Co-doped TiO2 International-presentation

T. Fukumura, K. Ueno, H. Toyosaki, M. Nakano, T. Yamasaki, M. Kawasaki

IMR Workshop on Advanced Materials　2007/03/01
Spin Related Transport in High TC Ferromagnetic Oxide Semiconductor (TiCo)O2 International-presentation

M. Kawasaki, K. Ueno, H. Toyosaki, T. Fukumura

ATI International Workshop and IFCAM International Workshop on SPIN CURRENTS　2007/02/19
Hall Effects in Oxide Semiconductors

A. Tsukazaki, H. Toyosaki, K. Ueno, A. Ohtomo, T. Fukumura, M. Kawasaki

科研費特定領域2006年度成果報告会　2007/01/05
CoドープTiO2の異常ホール効果

福村知昭, 上野和紀, 豊崎秀海, 中野匡規, 川崎雅司

第11回半導体スピン工学の基礎と応用 PASPS-11　2006/12/14
CoドープTiO2の構造・磁性・デバイス

金研ワークショップ「強磁性半導体スピントロニクスの室温動作を目指して～構造と物性の理解～」　2006/11/10
二酸化チタンを用いた透明で電気を流す強磁性体

ボトムアップ若手の会　2006/11/08
強磁性酸化物半導体の創成とデバイス実証

福村知昭, 豊崎秀海, 川崎雅司

丸文研究交流財団10周年記念学術フォーラム　2006/09/30
Magnetic oxide semiconductors International-presentation

M. Kawasaki

CIMTEC 2006　2006/06/04
透明強磁性半導体の高温強磁性とスピン注入

豊崎秀海, 中野匡規, 川崎雅司

学術創成研究「新しい研究ネットワークによる電子相関系の研究−物理学と化学の真の融合を目指して」全体会議　2006/01/30
ルチル構造Ti_1-xCo_xO₂を透明電極とする有機EL素子の発光特性

中野匡規, 豊崎秀海, 川崎雅司

学術創成研究「新しい研究ネットワークによる電子相関系の研究−物理学と化学の真の融合を目指して」全体会議　2006/01/30
Ferromagnetic oxide semiconductor rutile Ti_1-xCo_xO_2-d as a spin injection electrode of magnetic tunnel junction International-presentation

H. Toyosaki, M. Kawasaki

International Conference on “Frontiers of Materials Science”　2005/12/07
室温動作を目指した半導体スピントロニクス

第110回金研講演会　2005/11/14
室温強磁性半導体CoドープルチルTiO2の強磁性とデバイス

金研ワークショップ「ワイドギャップ希薄磁性半導体」　2005/10/13
透明で電気を流す強磁性体

東北大多元研勉強会　2005/10/01
強磁性酸化物半導体の物性とデバイスの可能性

豊崎秀海, 川崎雅司

第66回応用物理学会学術講演会　2005/09/07
ワイドギャップ強磁性半導体の進展

酸化チタンをベースにした新しい光・磁気・電子機能の開拓若手研究会　2005/06/30
Ferromagnetic oxide semiconductors International-presentation

AFOSR Wide Band Gap Ferromagnetic Semiconductors Workshop　2005/05/15
Room temperature ferromagnetic oxide semiconductor: Co-doped TiO₂ International-presentation

T. Fukumura, H. Toyosaki, Y. Yamada, M. Nakano, M. Kawasaki

International Symposium on Frontier in Materials Design, Synthesis and Measurements　2005/03/11
強磁性酸化物半導体の最近の展開

第6回スピンエレクトロニクス専門研究会　2005/02/28
Coドープ二酸化チタンの強磁性―現在の理解―

金研ワークショップ　2005/01/13
Multiply transition-metal-doped TiO2 epitaxial thin film library International-presentation

T. Fukumura, Y. Yamada, H. Toyosaki, A. Ohtomo, F. Matsukura, H. Ohno, M. Kawasaki

The Third Japan-U.S.Workshop on Combinatorial Materials Science　2004/12/08
酸化物磁性半導体の開拓―初合成から室温強磁性の検証まで―

第65回応用物理学会学術講演会　2004/09/01
Epitaxial Combinatorial Library of Transition Metal Oxides and Oxide Semiconductors for Opto-and Spin- Electronics International-presentation

T. Fukumura, M. Kawasaki, A. Ohtomo, M. Ohtani, Y. Yamada, J. Nishimura, Y. Toyosaki, H. Koinuma, Y. Matsumoto, A. Yamamoto, K. Nakajima, T. Chikyow, T. Hasegawa

Gordon Conference on Combinatorial & High Throughput Materials Science　2004/01/25
Epitaxial Combinatorial Library for Oxide Electronics International-presentation

Fukumura, M. Ohtani, Y. Yamada, J. Nishimura, H. Sakurada, X. Zhao, H. Sugaya, K. Nakajima, A. Ohtomo, A. Yamamoto, Y. Matsumoto, T. Chikyow, T. Hasegawa, H. Koinuma, M. Kawasaki

MRS Fall Meeting　2003/12/01
Exploration of magnetic oxide semiconductors toward transparent spintronics International-presentation

The 2nd US-Japan Workshop on Combinatorial Materials Science and Technology　2002/12/09
機能性酸化物薄膜ライブラリーの設計と評価―新しい光・磁気機能へのアプローチ

第49回応用物理学会関係連合講演会　2002/03/27
Exploration of transparent oxide diluted magnetic semiconductors with combinatorial approach International-presentation

SESSE-II The 2nd symposium on the Electron Spin Science and Engineering　2002/02/17
Combinatorial search for transparent oxide diluted magnetic semiconductors International-presentation

MRS Fall Meeting　2001/11/26
Exploration of transparent magnet: oxide diluted magnetic semiconductors International-presentation

T. Fukumura, M. Kawasaki, Z. Jin, H. Kimura, Y. Yamada, M. Haemori, K. Inaba, M. Murakami, R. Takahashi, Y. Matsumoto, T. Hasegawa, H. Koinuma

The 8th International Workshop on Oxide Electronics　2001/09/27
透明な希薄磁性酸化物の創製―コンビナトリアル材料科学によるアプローチ―

第2回化合物新磁性材料専門研究会　2001/07/27
Composition-spread epitaxial thin films of one dimensional cuprates as gigantic optical nonlinear oxides International-presentation

T. Fukumura, M. Ohtani, M. Kawasaki, K. Yamamoto, T. Makino, Y. Segawa, H. Koinuma

MRS Spring Meeting　2001/04/16
A speedy approach to constructing phase diagram of doped Mott insulators with composition-spread method International-presentation

SPIE Optoelectronics　2001/01/20
Development of fabrication and characterization techniques of composition-spread film for combinatorial material science International-presentation

The 5th BUTSUKO International Symposium　2000/12/12
Magnetic domain structure of a ferromagnetic semiconductor (Ga,Mn)As observed with scanning probe microscopes International-presentation

T. Fukumura, T. Shono, T. Hasegawa, F. Matsukura, H. Ohno

The International Conference on the Physics and Application of Spin-Related Phenomena in Semiconductors (PASPS 2000　2000/12

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期間？
コンビナトリアル手法によるZnOをベースとした酸化物磁性半導体の探索

第36回光スピニクス専門研究会　2000/11/28
Band-filling dependence of magnetic and electronic phases for manganite thin film with composition-spread approach International-presentation

Japan-US Workshop on Combinatorial Material Science and Technology　2000/10/01
High speed synthesis and characterization of manganite thin films International-presentation

18th General Conference of the Condensed Matter Division of the European Physical Society　2000/03/13
Scanning Hall Probe Microscope for Simultaneous Topographic and Magnetic Imaging of Magnetic Materials International-presentation

T. Fukumura, H. Sugawara, T. Hasegawa, K. Kitazawa, K. Tanaka, T. Noda, H. Sakaki, Y. Nagamune, H. Taguchi, J. Nakagawa, H. Nishio

STM'97 9th International Conference on Scanning Tunneling Microscopy / Spectroscopy and Related Techniques　1997/07
Scanning Hall Probe Microscopy for Simultaneous Topographic and Magnetic Imaging International-presentation

American Physical Society　1997/03
Development of Scanning Hall Probe-Tunneling Microscope International-presentation

T. Fukumura, Y. Nagamune, H. Sugawara, T. Hasegawa, H. Sakaki, K. Kitazawa

Satellite Workshop of 9th International Conference on Solid Surfaces　1995/11

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Industrial Property Rights 15

ダイオード及びその製造方法

川崎雅司, 福村知昭, 中野匡規

Property Type: Patent
ZnO系半導体素子

中原健, 川崎雅司, 福村知昭, 中野匡規

Property Type: Patent
光照射コバルトドープ二酸化チタン膜

川崎雅司, 福村知昭, 豊崎秀海, 中野匡規

Property Type: Patent
多層膜構造体、及び素子構造

川崎雅司, 福村知昭, 大友明, 豊崎秀海, 山田康博, 大野英男, 松倉文▲礼

4102880号

Property Type: Patent
薄膜及びｐ型酸化亜鉛薄膜製造方法と半導体デバイス

川崎雅司, 大友明, 福村知昭, 塚▲崎▼ 敦, 大谷亮

3834658号

Property Type: Patent
コバルトドープ二酸化チタン膜の作製方法、コバルトドープ二酸化チタン膜、及び多層膜構造

川崎雅司, 福村知昭, 大友明, 豊崎秀海, 山田康博, 大野英男, 松倉文▲礼

3944584号

Property Type: Patent
酸化亜鉛系蛍光体

川崎雅司, 福村知昭, モロドコヴィチ, ウラジミール, 今泉文武, 竹内安正

Property Type: Patent
青色発光蛍光体

川崎雅司, 福村知昭, モロドコヴィチ, ウラジミール, 今泉文武, 林秀樹

4081582号

Property Type: Patent
紫外線吸収物質の製造方法

鯉沼秀臣, 川崎雅司, 福村知昭, 山田康博, 宮脇順一, 齋藤力

Property Type: Patent

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再公表特許（Ａ１）
面内格子定数調整基板の作製方法及び面内格子定数調整基板

鯉沼秀臣, 川崎雅司, 福村知昭, 寺井恒太

3762978号

Property Type: Patent
黄色発光蛍光体

川崎雅司, 福村知昭, 鯉沼秀臣, 竹内安正, モロドコヴィチ, ウラジミール

Property Type: Patent
Ｘ線回折を用いた結晶の観察方法及びその観察装置

鯉沼秀臣, 川崎雅司, 福村知昭, 大谷亮, 表和彦, 菊池哲夫

3676249号

Property Type: Patent
非線形光学効果を有する銅酸化物材料薄膜およびその製造方法およびその銅酸化物材料薄膜を用いた光導波路素子

眞子隆志, 川崎雅司, 福村知昭, 沖本洋一, 和泉真, 五神真, 島野亮, 十倉好紀

3503699号

Property Type: Patent
磁気バブルメモリ

北沢宏一, 長谷川哲也, 福村知昭, 木村剛, 十倉好紀

Property Type: Patent
磁区観察方法および磁区観察装置

北沢宏一, 長谷川哲也, 福村知昭, 中川準

Property Type: Patent

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Research Projects 18

Renaissance of Transition Metal Oxides: New Superconductivity in Hetero d-Electron Oxide Systems

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

Category: Grant-in-Aid for Scientific Research (A)

Institution: Tohoku University

2023/04/01 - 2026/03/31
Exploration of new functionalities in 4f-5d electron system via invention of rare earth monoxides

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

Category: Grant-in-Aid for Scientific Research (S)

Institution: Tohoku University

2021/07/05 - 2026/03/31
希土類単酸化物におけるトポロジカル磁気状態の制御

福村知昭, AMRILLAH TAHTA

Offer Organization: 日本学術振興会

System: 科学研究費助成事業

Category: 特別研究員奨励費

Institution: 東北大学

2019/11/08 - 2022/03/31

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前期ランタノイド単酸化物は，約40年前に粉末多結晶として報告されていたが，周期表のガドリニウムからツリウムに至る後期ランタノイド単酸化物は気相のみ存在しており，ごく最近ガドリニウム単酸化物の固相をエピタキシャル薄膜として合成することに成功したばかりである。後期ランタノイド単酸化物は，大きな磁化と高いキュリー温度をもつ強磁性体である可能性がある。ガドリニウム単酸化物は室温に近いキュリー温度をもつ強磁性体であるものの，酸化されやすく，他の後期ランタノイド単酸化物が作製できるか不明であった。今回，岩塩構造ホロミウム単酸化物のエピタキシャル薄膜の作製に成功し，高い電気伝導性をもつ狭ギャップ強磁性半導体で，大きな負の磁気抵抗と異常ホール効果が観測された。キュリー温度は約130ケルビンであり，既存のホロミウムモノカルコゲナイドの中で一番高いキュリー温度をもつ硫化物よりも110ケルビン高い。キュリー温度直下では，他のホロミウム二元化合物でも見られるような単調でないスピン配列に由来すると考えられるメタ磁性的なふるまいを示したが，その温度領域は高いキュリー温度を反映して，他のホロミウム化合物よりもはるかに高かった。また，電子ドーパントとなる酸素欠損量の増大とともに，電気伝導性は増す一方でキュリー温度は低下するという，従来の強磁性半導体のキュリー温度の振る舞いとは相反する傾向が見られた。また，チタン酸ストロンチウム単結晶基板に熱アニールを施し，ストロンチウム単酸化物終端の表面を形成して基板からの酸素拡散を防ぐことで，ユーロピウム単酸化物エピタキシャル薄膜の直接成膜に成功し，走査型トンネル顕微鏡によるユーロピウム単酸化物薄膜表面の原子分解能観察を達成した。
Innovative environmental and energy materials based on atomic-scale oxide surface control

Hitosugi Taro

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

Category: Grant-in-Aid for Scientific Research (A)

Institution: Tokyo Institute of Technology

2018/04/01 - 2022/03/31

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The surfaces and interfaces of metal oxides are extremely important because battery and catalytic reactions occur at those sites. It is generally difficult to reveal the surface and interface electronic structures with atomic-level spatial resolution. Therefore, we have combined metal-oxide epitaxial thin-film technology with scanning tunneling microscopy (STM) to reveal the atomic structures and electronic states on the surfaces of metal-oxide thin films. In this study, the knowledge of the surfaces and interfaces is applied to environmental and energy materials. Specifically, we introduce solid-state physics perspectives into electrochemical research and explore materials and physical properties.
Exploration of rare earth oxide spintronics using room temperature ferromagnetic oxide semiconductor with large magnetization

FUKUMURA Tomoteru

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

Category: Grant-in-Aid for Scientific Research (A)

Institution: Tohoku University

2018/04/01 - 2022/03/31

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In fields of spintronics, ferromagnetic semiconductors are required to fulfill both high Curie temperature and large magnetization. However, such requirement has not been satisfied yet. In this study, we discovered high temperature ferromagnetic semiconductor with large magnetization, which is not diluted ferromagnetic semiconductor. In addition, we discovered various rare earth monoxides such as ferromagnetic metal, highly conducting semiconductors, and superconductor. Their simple rocksalt structure enables to fabricate their heteroepitaxial structures. This achievement paves the way to spintronics using electrically conducting rare earth oxides.
Management and research support by platform construction of 3D active-site science

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

Category: Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)

Institution: Toyota Physical and Chemical Research Institute

2019/04/01 - 2020/03/31
Creation and nanoscale observation of magnetic skyrmions at large spin-orbit coupling oxide heterostructures

Fukumura Tomoteru

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

Category: Grant-in-Aid for Challenging Research (Exploratory)

Institution: Tohoku University

2018/06/29 - 2020/03/31

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We explored electronic and magnetic properties of rare-earth monoxides as new candidate materials that generate magnetic skyrmions. New ferromagnetic NdO and PrO and high pressure phase fcc type Pr epitaxial thin films were synthesized for the first time by pulse laser deposition (PLD). LaO / EuO heteroepitaxial structure showed clear spin Hall magnetoresistance in spite of no trace of magnetic skyrmions. Using low-temperature scanning tunneling microscopy with PLD, we performed in-situ experiments of SrVO3 ultrathin films and Pr thin films. In SrVO3 film, two surface reconstructions were observed to influence electronic states, which probably are connected with the metal-insulator transition. In Pr thin film, electronic standing waves were observed in their differential conductance maps.
Construction of oversea base and international network for 3D active site science

DAIMON Hiroshi

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

Category: Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)

Institution: Nara Institute of Science and Technology

2015/11/06 - 2019/03/31

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In order to spread the advanced Japanese science and technology based on the 3D-active-site science to the world, we actively promoted the appeal of achievement results through organizing the international workshop and the publications of English textbooks and special issues in international journals. We supported our young researchers actively collaborating abroad for a long term and inviting overseas researchers to our groups. We promoted the foundation of overseas researcher community with a deep understanding of the concept and significance of this field. As a result, a joint research network based on large-scale advanced synchrotron radiation facilities and overseas research institutes was established.
Invention of 3D Active sites in Advanced Semiconductors and Functional Materials

Fukumura Tomoteru, HIROSE Yasushi

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

Category: Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)

2014/07/10 - 2019/03/31

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3D atomic structures around dopants and defects in various compound and oxide semiconductors and their relation with functionalities have been elucidated by fabricating a large number of functional inorganic materials for holography measurements. Notable achievements are (1) the first observation of suboxidic structure around Co in room temperature ferromagnetic semiconductor Co-doped TiO2, and (2) the observation of microscopic structure in visible light photocatalyst Rh-doped SrTiO3 and clarification of relationship between the local structure and the photocatalytic activity. In addition, roles of various active sites were clarified by investigating 3D atomic structures and interfacial and surface structures in a large number of functional materials. Consequently, these results contributed to improvement of their functionalities and to development of new functional materials possessing new active sites.
Supervision and research support by platform construction of 3D active-site science

DAIMON Hiroshi

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

Category: Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)

Institution: Nara Institute of Science and Technology

2014/07/10 - 2019/03/31

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By preparing a high-level experimental environment, and supporting application and analysis of synchrotron research, we activated the research and collaboration among members. By conducting many results briefing sessions, symposia, outreach activities, site visits, etc., we enhanced mutual understanding and many collaborations in fusion area. Our advanced knowledge was spread to the world through the special issue of English magazines and the publication of Japanese and English textbooks. We have fostered many young scientists by giving spring school and poster awards and subsidizing travel expenses for international conferences. These were widely spread through the issuance of Japanese and English domain homepages and News Letter. As a result, we were able to create the science of atomic arrangement around isolated active atoms, which is important for the functional advanced materials in Japan.
Vapor phase synthesis of high pressure phase platinum group oxide

Fukumura Tomoteru, OKA Daichi, FATIMA Zainab

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

Category: Grant-in-Aid for Challenging Exploratory Research

Institution: Tohoku University

2016/04/01 - 2018/03/31

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Pulsed laser deposition method enabled to synthesize high pressure phase HP-PdF2 type RuO2 polycrystal film, while it was difficult to obtain its epitaxial thin film. On the other hand, the most stable rutile type RuO2 epitaxial thin films were synthesized on yttria stabilized zirconia and sapphire single crystal substrates. By introducing buffer layer for the thin film growth, extraordinarily high-strained thin films were obtained, and their resistivity was significantly changed. Accordingly, it will be possible to control physical properties of RuO2 and platinum group thin films by using the large lattice strain.
Study of 3D local structures around magnetic elements in room temperature ferromagnetic semiconductors

Hayashi Koichi, Fukumura Tomoteru, Uchitomi Naotaka, Akagi Kazuto

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

Category: Grant-in-Aid for Scientific Research (B)

2013/04/01 - 2017/03/31

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To understand local structures around magnetic elements, we measured X-ray fluorescence holograms of Co:TiO2 thin film, Mn:ZnSnAs2 thin film and GeMnTe thin film. In Co:TiO2 thin film, we discovered suboxide clusters around Co. The crystal structure of ZnSnAs2 thin film was sphalerite-type, and the As sublattice was largely distorted. Moreover, the local structure around Ge in GeMnTe thin film, reflecting rhombohedral GeTe structure, had lower symmetry than that around Mn.
Fabrication of layered Bi oxide single crystalline thin film with anomalous valence by developing reductive solid phase epitaxy

FUKUMURA Tomoteru, HASEGAWA Tetsuya, SEI Ryosuke

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

Category: Grant-in-Aid for Challenging Exploratory Research

2014/04/01 - 2016/03/31

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Y2O2Bi is a layered compound possessing anomalous valence Bi2- square net. Only powder polycrystal has been synthesized in previous studies, so that intrinsic physical properties were not sufficiently investigated. In this study, we developed reductive solid phase epitaxy with powder precursor for thin film epitaxy of this compound. Subsequently, we developed multilayer solid phase epitaxy, resulting in large improvement of thin film crystallinity. Consequently, we successfully observed two dimensional electronic transport with large spin orbit interaction owing to the Bi square net. By using the solid phase epitaxy, various R2O2Bi (R = rare earth) epitaxial thin films were grown. These R2O2Bi showed peculiar magnetotransport properties reflecting interaction between f electron magnetism and Bi square net.
強磁性酸化物半導体の高温強磁性の微視的機構

福村知昭

Offer Organization: 日本学術振興会

System: 科学研究費助成事業

Category: 特定領域研究

2009 - 2010

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コバルトドープ二酸化チタンは室温強磁性を示す強磁性半導体である。しかしながら、通常の強磁性半導体のように強磁性の交換相互作用をキャリアが媒介しているかどうか明らかでなかった。前年度に引き続き、電界効果による電界ドーピングおよび酸素欠損量の調整による化学ドーピング、と二つの異なる手法で電子ドーピングを行った結果、双方でキャリア濃度の増加とともに異常ホール効果の増大が見られた。キャリア濃度による顕著な磁気異方性の変化は見られないことから、キャリア濃度の変化で磁化の回転は生じていない。したがって、キャリア増加による異常ホール効果の増大は磁化の増大を示し、電子キャリアが強磁性の交換相互作用を媒介していることが明らかになった。この結果は、室温強磁性を電界効果で制御したはじめての例といえ、室温半導体スピントロニクスへの展開に期待が持てる。また、特定領域内の東大藤森教授グループとの共同研究で、全電子収量および全蛍光収量のX線磁気円二色性分光を行った結果、それぞれ試料表面および試料内部の磁化の定量的測定に成功した。試料内部の磁化の大きさは磁束計による磁化測定とほぼ一致し、バルク磁化といえる。一方、表面磁化はバルク磁化より顕著に小さかった。強磁性が電子キャリアに媒介されていることを考えると、試料表面ではバンドベンディングにより電子キャリアが空乏化しており、表面磁化の減少が起きていると考えられる。これは強磁性半導体に一般に起きうる現象である。
コバルトドープ二酸化チタンの異常ホール効果の電界制御

福村知昭

Offer Organization: 日本学術振興会

System: 科学研究費助成事業

Category: 特定領域研究

Institution: 東北大学

2008 - 2008

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コバルトドープ二酸化チタンは、室温よりはるかに高いキュリー温度を持つ強磁性半導体である。したがって、室温で利用できる半導体スピントロニクス材料の有力候補として注目されている。半導体の性質を持つため、キャリア濃度を増減させることにより、強磁性の制御が原理的に可能である。しかしながら、化学ドーピングによる強磁性の制御は実証済みであるが、電界ドーピングによる強磁性の制御は未だなされていない。本研究の最終的な目的は電界ドーピングによるコバルトドープ二酸化チタン室温強磁性の制御である。まず、電界効果トランジスタ構造を作製するのに適しているスパッタ法での薄膜作製に取り組んだ。その結果、ルチル構造を持つコバルトドープ二酸化チタンの薄膜をスパッタ法で作製することに成功した。そして、強磁性半導体の指標である異常ホール効果および磁気光学効果の観測に初めて成功した。今までスパッタ法による薄膜の明瞭な室温強磁性半導体の性質を示す報告はなかったが、スパッタ法で十分な特性を示す薄膜をガラス基板上にも作製可能であることを実証した。この結果は、磁気光学応用を目指した磁気光学特性に関する共同研究へと発展した。続いて、パルスレーザー堆積法で作製したアナターゼ構造を持つコバルトドープ二酸化チタンの室温強磁性の電界効果に取り組んだ。強電界の印加が容易にできることが知られている電気二重層トランジスタにより電界を印加することにより、初めて強磁性半導体の室温強磁性を電界効果で制御することに成功した。これによって、半導体スピントロニクスの室温動作の可能性が開かれた。
Light induced room temperature magnetoresistance oscillation in ferromagnetic oxide semiconductor

FUKUMURA Tomoteru

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

Category: Grant-in-Aid for Young Scientists (A)

Institution: Tohoku University

2007 - 2008
Exploration of photonic electronic magnetic and their mutual functionalities in non-equilibrium and transparent oxide thin films accelerated by parallel epitaxy

KAWASAKI Masashi, KAWAZOE Yoshiyuki, FUKUMURA Tomoteru, OHTOMO Akira, MATSUKURA Fumihiro, OHTANI Keita

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

Category: Grant-in-Aid for Creative Scientific Research

Institution: Tohoku University

2002 - 2006

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After the discovery of high Tc superconductors, the research on epitaxial oxide thin films has been rapidly advanced to extend its research area to versatile functionalities such as ferroelectric, magnetic, and photonic ones. Atomic scale control of crystal growth process and heterostructures explore oxide electronics, among which oxide semiconductors play important role to realize applications that cannot be achieved by conventional semiconductors. In this research program, transparent semiconductors such as ZnO and TiO_2, are examined to donate novel photonic, electronic and magnetic functionalities through efficient parallel synthesis method. Such prototypical devices have been demonstrated as ZnO ultraviolet light emitting diodes, high mobility ZnO invisible transistors, magnetic tunnel junctions of (TiCo)_2. The followings are examples of the output. Photonic Functionality 1. Temperature gradient method was developed as one of the parallel epitaxy method to optimize the growth conditions for making world-best intrinsic ZnO. 2. P-type ZnO was produced for the first time by developing repeated temperature modulation technique to facilitate the incorporation and activation of nitrogen as acceptors. 3. Ultraviolet LED was demonstrated in ZnO pn-junctions. Electronic Functionality 4. Polycrystalline channel ZnO thin film transistors were formulated by a simulator and limiting factors of device performance were clarified. 5. A field effect mobility of 200cm2Ns was achieved in single crystalline ZnO TFT. 6. Quantum Hall effect was observed in oxide for the first time. Magnetic Functionality 7. Spin polarized nature of charge carriers in TiO_2: Co was confirmed by magneto-optic and anomalous Hall effects. 8. Magnetic tunnel junctions of TiO_2: Co was demonstrated as a first example of spin injection device of wide bandgap magnetic semiconductors. 9. Electronic structure of TiO_2: Co was studied by first principle calculation.
有機EL素子と室温強磁性半導体を融合した透明スピントロニクスの創生

福村知昭

Offer Organization: 日本学術振興会

System: 科学研究費助成事業

Category: 若手研究(A)

Institution: 東北大学

2004 - 2005

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本研究の目標は、室温強磁性半導体と有機材料を融合した透明スピントロニクスの実現である。デバイスの実際の作製に加え、室温強磁性半導体CoドープTiO_2の強磁性発現機構の解明も行う。そこで、今年度は以下の研究を行った。 1 室温強磁性半導体CoドープTiO_2(ルチル)薄膜を用いた有機EL素子の作製と評価 2 室温強磁性半導体CoドープTiO_2薄膜の物性評価 (1)キャリア濃度を系統的に制御した試料の異常ホール効果と磁気円二色性の測定 (2)共同研究による放射光設備などを用いた分光測定 (3)室温デバイス動作を目指したスピン注入実験研究成果 1 スタンダードな発光層であるAlq_3を用いた有機EL素子の作製を行った。還元したTiO_2をアノードに用いた有機EL素子は明瞭な面発光を示し、従来のインジウムスズ酸化物をアノードに用いた有機EL素子に匹敵する発光効率を示した。TiO_2は化学的に安定で製造コストも安いことから、インジウムスズ酸化物のアノードに代わり得る。CoドープTiO_2をアノードに用いても同等の発光特性を示すことから、有機EL素子へスピン偏極キャリアを注入可能であることがわかった。(論文1報投稿予定) 2 (1)酸素欠損量の変化によりキャリア濃度を系統的に制御したCoドープTiO_2の異常ホール効果と磁気円二色性の測定結果から、高キャリア濃度で強磁性が発現することがわかった。(2)X線光電子分光からCoの不純物準位がTiO_2の電子状態と強く結合していることがわかり、X線磁気円二色性からCoの電子状態はCo^<2+>の高スピン配置をとることがわかった。これらの結果はCoドープTiO_2の強磁性がキャリア誘起であることを強く示唆し、強磁性半導体の性質を持つことを示すものである。(3)CoドープTiO_2とCoFeを強磁性電極とするトンネル磁気抵抗素子を作製した結果、従来の強磁性半導体の約3倍という200Kまでトンネル磁気抵抗効果が発現することがわかった。これは半導体スピントロニクスデバイスの室温動作に大きく迫る成果である。

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Social Activities 8

若手研究者9人を表彰トーキン科学技術振興財団

2009/03/18 -
強磁性半導体室温動作が可能東北大学酸化チタン系開発

2008/11/11 -
室温で動く強磁性材料－半導体用、東北大が開発－

2008/11/06 -
影響力ある論文日本人17人選ぶトムソンサイエンティフィック

2007/09/28 -
New Spin on Silicon

2004/06 -
Silicon-based Spintronics

2004/04 -
強磁性半導体室温で動作

2004/03/20 -
強磁性半導体を開発

2004/03/20 -

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軽元素を活用した機能性電子材料の創出

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一般に、希土類酸化物はR2O3（R：希土類元素）という化学式で表される。ここで希土類イオンは3価を取り不対電子をもたないため、R2O3は一般に透明な絶縁体である。ところが、イットリウム酸化物の薄膜をパルスレーザー堆積法で作製する際に、試料の酸化をできるだけ避けるように還元条件を用いた結果、2価のイットリウムイオンをもつYO薄膜を合成することに成功した。これまで気相のYOのみ報告されていたが、本研究では岩塩構造のYOを合成することができた。イットリウムイオンは1個の4d電子をもつため、Y2O3と異なり、不透明で電気伝導性をもつ。その電気伝導性は、通常の酸化物半導体と同様に、酸素欠損量を変えることで制御することができる。
ワイドギャップ強磁性半導体デバイス

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ワイドギャップ強磁性半導体デバイス
二酸化チタンをベースとしたスピントロニクス材料のホール効果に関する研究

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二酸化チタンをベースとしたスピントロニクス材料のホール効果に関する研究
室温強磁性半導体を用いた室温動作スピントロニクスデバイスの開発

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室温強磁性半導体コバルトドープ二酸化チタンを用いたスピントロニクスデバイスを開発して、室温動作の実現に取り組む。
透明強磁性半導体における強磁性発現のメカニズムの探求

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透明強磁性半導体における強磁性発現のメカニズムの探求
機能性酸化物と有機デバイスの融合

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機能性酸化物と有機デバイスの融合
不純物ドーピングした酸化亜鉛微粒子の光機能創製

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不純物ドーピングした酸化亜鉛微粒子の光機能創製
ワイドギャップ半導体酸化亜鉛の高品質量子へテロ構造の開発

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ワイドギャップ半導体酸化亜鉛の高品質量子へテロ構造の開発
酸化物半導体への遷移金属ドーピングによる透明磁石の創製

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酸化物半導体への遷移金属ドーピングによる透明磁石の創製
電界効果を用いた酸化物磁性半導体ベース新機能素子の創製

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電界効果を用いた酸化物磁性半導体ベース新機能素子の創製

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