東北大学研究者紹介

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ナカイ　トモオ

中居　倫夫

Tomoo Nakai

所属

大学院工学研究科　ファインメカニクス専攻　材料メカニクス講座（知的計測評価学分野）

職名

助教

学位

博士（工学）（東北大学）

researchmap

https://researchmap.jp/read0160027

J-GLOBAL ID

200901098482596221

e-Rad 研究者番号

80270817

ORCID

https://orcid.org/0009-0005-8851-0367

Researcher ID

PEV-9913-2025

経歴 5

2025年4月～継続中

東北大学大学院工学研究科ファインメカニクス専攻　助教
1999年4月～ 2025年3月

宮城県産業技術総合センター
1996年4月～ 1999年3月

宮城県工業技術センター
1994年4月～ 1996年3月

東北大学工学部機械知能工学科　助手
1989年4月～ 1994年3月

宮城県工業技術センター

学歴 2

東北大学　大学院工学研究科　原子核工学専攻

1988年4月～ 1989年3月
東北大学　工学部　原子核工学科

～ 1988年3月

所属学協会 4

日本磁気学会
電気学会
日本非破壊検査協会
日本機械学会

研究キーワード 4

センサ
薄膜
sensor
thin film

研究分野 3

ものづくり技術（機械・電気電子・化学工学） / 材料力学、機械材料 /
ものづくり技術（機械・電気電子・化学工学） / 電気電子材料工学 /
ものづくり技術（機械・電気電子・化学工学） / 電子デバイス、電子機器 /

論文 46

Analysis of Magnetic Domain Transition for Magnetostrictive Co-Nb-Zr thin film strips with inclined uniaxial easy-axis 査読有り

Tomoo Nakai

IEEE Transactions on Magnetics　1-6　2026年6月

DOI： 10.1109/TMAG.2026.3698404 　
Influence of Processing Method on the Multiple Resonance of Amorphous Co84.5Nb7.5Zr8 Thin Films 査読有り

Tomoo Nakai

SPIN　16　(1&2)　2650003-1-2650003-14　2026年3月10日

DOI： 10.1142/S2010324726500037 　
Influence of distributed surface-normal magnetic field on the permeability of magnetostrictive Co-Nb-Zr thin-film strips 査読有り

Tomoo Nakai

Materials Today Communications　50　114384　2026年1月
出版者・発行元： Elsevier BV
DOI： 10.1016/j.mtcomm.2025.114384 　

ISSN：2352-4928
Relationship of Magnetic Domain and Permeability for Clustered Soft Magnetic Narrow Strips with In-Plane Inclined Magnetization Easy Axis on Distributed Magnetic Field 査読有り

Tomoo Nakai

Sensors　24　(2)　706　2024年1月22日
出版者・発行元： MDPI AG
DOI： 10.3390/s24020706 　

eISSN：1424-8220

詳細を見る詳細を閉じる

A unique functionality was reported for a thin-film soft magnetic strip with a certain angle of inclined magnetic anisotropy. It can switch magnetic domain by applying a surface normal field with a certain distribution on the element. The domain switches between a single domain and a multi-domain. Our previous study shows that this phenomenon appears even in the case of the adjacent configuration of multiple narrow strips. It was also reported that the magnetic permeability for the alternating current (AC) magnetic field changes drastically in the frequency range from 10 kHz to 10 MHz as a function of the strength of the distributed magnetic field. In this paper, the correspondence of AC permeability and the magnetic domain as a function of the intensity of the distributed field is investigated. It was confirmed that the extension of the area of the Landau–Lifshitz-like multi-domain on the clustered narrow strips was observed as a function of the intensity of the distributed magnetic field, and this domain extension was matched with the permeability variation. The result leads to the application of this phenomenon to a tunable inductor, electromagnetic shielding, or a sensor for detecting and memorizing the existence of a distributed magnetic field generated by a magnetic nanoparticle in the vicinity of the sensor.
Permeability of Clustered Soft Magnetic Narrow Strips Controlled by a Surface Normal Magnetic Field 査読有り

Tomoo Nakai

IEEE Transactions on Magnetics　2023年11月

DOI： 10.1109/TMAG.2023.3289139 　
High-Frequency Permeability of Adjacent Narrow Strips Having an Inclined Magnetic Anisotropy 査読有り

Tomoo Nakai

SPIN　13　(02)　2023年3月3日
出版者・発行元： World Scientific Pub Co Pte Ltd
DOI： 10.1142/s2010324723400039 　

ISSN：2010-3247

eISSN：2010-3255

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This study deals with a phenomenon of magnetic domain transition of adjacent narrow thin film strips with inclined uniaxial magnetic anisotropy. Our previous research shows that individual element with 70° inclined easy magnetization axis has a typical characteristic of the domain transition, and the transition can be controlled by the normal magnetic field. We also applied this phenomenon and controlling method to the two-dimensional configuration of line arrangement adjacent to many-body elements, in which mutual magnetic interaction exists. The result shows that the hidden inclined Landau–Lifshitz domain appears by applying a distributed normal field the same as an individual single element. This paper reports a comprehensive magnetic property, such as magnetic domains, magnetic hysteresis-loop (MH-loop), and high-frequency permeability of the adjacent many-body elements, in some fabrication conditions surrounding the exact condition where the hidden inclined Landau–Lifshitz domain appears. The result shows an estimation of a switched device of high-frequency permeability caused by the switched magnetic domain using the hidden domain and the control of distributed normal field. This phenomenon would be expected to apply functional devices, such as a switched inductor or a switched electromagnetic shielding, or a magnetic sensor.
Study on Detection of a Small Magnetic Particle Using Thin Film Magneto-Impedance Sensor with Subjecting to Strong Normal Field 査読有り

Tomoo Nakai

Micromachines　13　(8)　1199　2022年7月28日
出版者・発行元： MDPI AG
DOI： 10.3390/mi13081199 　

eISSN：2072-666X

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This paper deals with the detection of small magnetization using a thin film magneto-impedance sensor with subjecting to strong normal field. The sensor was made by soft magnetic amorphous thin-film with uniaxial magnetic anisotropy in the width direction of the element. It was reported that the sensor has very high sensitivity, such as pico-tesla order, when it is driven by hundreds of MHz. In this paper, a sensitive measurement method aiming for detection of a small particle or a cluster of nano-particles, having low-remanence, is proposed. The point is the application of strong normal field in the measurement area including sensor element and particle. The normal strong field is applied in the normal direction of the sensor plane in the value almost hundreds of mT. Instead of such strong normal field, the sensor keeps high sensitivity, because of the demagnetizing force in the thickness direction. A theoretical estimation for clarifying an efficiency of the method, experimental results of sensor property and sensitivity with subjecting to the normal field, and also a confirmation of detection of a small particle using the proposed method is reported. As a special mention, detection fundamentals when a applied surface normal field has a distribution and also a particle would run through in the vicinity of sensor is discussed.
A Uniform Magnetic Field Generator Combined with a Thin-Film Magneto-Impedance Sensor Capable of Human Body Scans 査読有り

Tomoo Nakai

Sensors　22　(9)　3120　2022年4月19日
出版者・発行元： MDPI AG
DOI： 10.3390/s22093120 　

eISSN：1424-8220

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A detection system for magnetic inclusions of large bulk, such as that of a whole human body, is proposed in this paper. The system consists of both a uniform magnetic field generating apparatus capable of the insertion of a whole human body and also of a high-sensitivity magnetic sensor array installed in the strong magnetic field. The system can detect the magnetic inclusion simultaneously through its magnetization, which is advantageous for detecting low-remanence magnetic materials, such as a cluster of nanoparticles. The thin-film magneto-impedance sensor was reported to be capable of tolerating strong magnetic fields of more than 3000 Gauss (0.3 T) in the substrate’s normal direction and can retain its sensitivity even in strong fields. Through a combination of both uniformity of strength and the placement of its directionally aligned, static magnetic field in a particular measurement area and its array of single-dimensional thin-film magneto-impedance sensors, it was reported that it can estimate a magnetic sample’s 3D position by using a simple equation. The aim of the system developed in this study is to nondestructively detect a cluster of magnetic nanoparticles in a human body and also to detect the position and the concentration of the clustered magnetic particles. In this paper, a prototype system consisting of a magnetic field generator with an area of W500 mm × L400 mm × H210 mm and a uniform magnetic field of 370 Gauss (37 mT) is reported. It also reported that the thin-film magneto-impedance sensor installed in the system verified the detection of 2 mm × 1 mm small ellipsoidal magnetic chips at a distance of 27 mm from the sensor element.
Estimation of Position and Size of a Contaminant in Aluminum Casting Using a Thin-Film Magnetic Sensor 査読有り

Tomoo Nakai

Micromachines　13　(1)　127　2022年1月14日
出版者・発行元： MDPI AG
DOI： 10.3390/mi13010127 　

eISSN：2072-666X

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Advanced manufacturing processes require an in-line full inspection system. A nondestructive inspection system able to detect a contaminant such as tool chipping was utilized for the purpose of detecting a defective product as well as damaged machine tools used to fabricate the product. In a previous study, a system able to detect magnetic tool steel chipping in conductive material such as aluminum was developed and tested. In this study, a method of position and size estimation for magnetic chipping was investigated and is described. An experimental confirmation of the proposed method was also carried out using an actual prototype system.
Nondestructive Detection of Magnetic Contaminant in Aluminum Casting Using Thin Film Magnetic Sensor 査読有り

Tomoo Nakai

Sensors　21　(12)　4063　2021年6月12日
出版者・発行元： MDPI AG
DOI： 10.3390/s21124063 　

eISSN：1424-8220

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The thin film magneto-impedance sensor is useful for detecting a magnetic material nondestructively. The sensor made by single layer uniaxial amorphous thin film has a tolerance against surface normal magnetic field because of its demagnetizing force in the thickness direction. Our previous study proposed the sensitive driving circuit using 400 MHz high frequency current running through the sensor to detect the logarithmic amplifier. We also confirmed the sensitivity of the sensor within 0.3 T static normal magnetic field, which resulted in detection of 5 × 10−8 T of 5 Hz signal. This paper proposes a nondestructive inspection system for how detecting a contaminant of small tool steel chipping in aluminum casting specimen would be carried out. Three channel array sensors installed in the 30 mT static field detecting area were fabricated and experimentally showed a detection of low remanence magnetic contaminant in a bulk aluminum casing specimen.
Property and Magnetic Domain of Thin Film MI Sensor with Subjecting to Normal Magnetic Field 査読有り

Tomoo Nakai

IEEJ Transactions on Sensors and Micromachines　140　(12)　343-348　2020年12月1日
出版者・発行元： Institute of Electrical Engineers of Japan (IEE Japan)
DOI： 10.1541/ieejsmas.140.343 　

ISSN：1341-8939

eISSN：1347-5525
Sensitivity of Thin Film Magnetoimpedance Sensor in 0.3 T Surface Normal Magnetic Field 査読有り

Tomoo Nakai

IEEJ Transactions on Electrical and Electronic Engineering　15　(8)　1230-1235　2020年6月29日
出版者・発行元： Wiley
DOI： 10.1002/tee.23186 　

ISSN：1931-4973

eISSN：1931-4981

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Detection of foreign matters and nanoparticles included in industrial and chemical products is an important application target for a sensor system. There is a need to detect a small piece of steel tool chipping or breakage included in the products nondestructively. A recent improvement of the manufacturing system strongly required an inspection of all items in every production process to realize the smart manufacturing system. A thin‐film magnetic field sensor is an impressive candidate for this target as it has an extremely high sensitivity, especially because it is driven by alternating current around hundreds of MHz, and it is also tolerant to a surface normal magnetic field due to its demagnetizing force in the thickness direction. In this study, the sensitivity of a sensor system that was created by applying a 0.3 T normal field to the detection area included in a sensor element and also by using a 400‐MHz high‐frequency driven thin‐film magnetoimpedance sensor was evaluated. An observation of the magnetic domain was also carried out at the same time as the sensitivity evaluation. © 2020 Institute of Electrical Engineers of Japan. Published by Wiley Periodicals LLC.
Magnetic Domain Transition of Adjacent Narrow Thin Film Strips with Inclined Uniaxial Magnetic Anisotropy 査読有り

Tomoo Nakai

Micromachines　11　(3)　279　2020年3月8日
出版者・発行元： MDPI AG
DOI： 10.3390/mi11030279 　

eISSN：2072-666X

詳細を見る詳細を閉じる

This study deals a phenomenon of magnetic domain transition for the stepped magneto-impedance element. Our previous research shows that an element with 70° inclined easy axis has a typical characteristic of the domain transition, and the transition can be controlled by the normal magnetic field. In this paper, we apply this phenomenon and controlling method to the line arrangement adjacent to many body elements, in which mutual magnetic interaction exists. The result shows that the hidden inclined Landau–Lifshitz domain appears by applying a distributed normal field the same as an individual element.
Magneto-Impedance Sensor Driven by 400 MHz Logarithmic Amplifier 査読有り

Tomoo Nakai

Micromachines　10　(6)　355　2019年5月29日
出版者・発行元： MDPI AG
DOI： 10.3390/mi10060355 　

eISSN：2072-666X

詳細を見る詳細を閉じる

A thin-film magnetic field sensor is useful for detecting foreign matters and nanoparticles included in industrial and medical products. It can detect a small piece of tool steel chipping or breakage inside the products nondestructively. An inspection of all items in the manufacturing process is desirable for the smart manufacturing system. This report provides an impressive candidate for realizing this target. A thin-film magneto-impedance sensor has an extremely high sensitivity, especially, it is driven by alternatiing current (AC) around 500 MHz. For driving the sensor in such high frequency, a special circuit is needed for detecting an impedance variation of the sensor. In this paper, a logarithmic amplifier for detecting a signal level of 400 MHz output of the sensor is proposed. The logarithmic amplifier is almost 5 mm × 5 mm size small IC-chip which is widely used in wireless devices such as cell phones for detecting high-frequency signal level. The merit of the amplifier is that it can translate hundreds of MHz signal to a direct current (DC) voltage signal which is proportional to the radio frequency (RF)signal by only one IC-chip, so that the combination of a chip Voltage Controlled Oscillator (VCO), a magneto-impedance (MI) sensor and the logarithmic amplifier can compose a simple sensor driving circuit.
Magnetic domain transition controlled by distributed normal magnetic field for stepped magneto-impedance sensor 査読有り

Tomoo Nakai

International Journal of Applied Electromagnetics and Mechanics　59　(1)　105-114　2019年3月21日
出版者・発行元： SAGE Publications
DOI： 10.3233/jae-171005 　

ISSN：1383-5416

eISSN：1875-8800
Magnetic Domain of Stepped Magneto-Impedance Sensor Controlled by a Normal Magnetic Field 査読有り

Tomoo Nakai

IEEJ Transactions on Sensors and Micromachines　138　(1)　23-29　2018年1月
出版者・発行元： Institute of Electrical Engineers of Japan (IEE Japan)
DOI： 10.1541/ieejsmas.138.23 　

ISSN：1341-8939

eISSN：1347-5525
Effects of DC Bias Current on Behavior and Sensitivity of Thin-Film Magnetoimpedance Element 査読有り

H. Kikuchi, C. Sumida, T. Nakai, S. Hashi, K. Ishiyama

IEEE TRANSACTIONS ON MAGNETICS　53　(11)　2017年11月

DOI： 10.1109/TMAG.2017.2703886 　

ISSN：0018-9464

eISSN：1941-0069
Partially Implicit Method for Fast Magnetization Analysis Using Assembled Domain Structure Model 査読有り

Shogo Tejima, Shumpei Ito, Takeshi Mifune, Tetsuji Matsuo, Tomoo Nakai

IEEE Transactions on Magnetics　53　(6)　1-4　2017年6月
出版者・発行元： Institute of Electrical and Electronics Engineers (IEEE)
DOI： 10.1109/tmag.2017.2661338 　

ISSN：0018-9464

eISSN：1941-0069
Magnetization analysis of stepped giant magneto impedance sensor using assembled domain structure model 査読有り

Shogo Tejima, Shumpei Ito, Takeshi Mifune, Tetsuji Matsuo, Tomoo Nakai

International Journal of Applied Electromagnetics and Mechanics　52　(1-2)　541-546　2016年12月29日
出版者・発行元： SAGE Publications
DOI： 10.3233/jae-162049 　

ISSN：1383-5416

eISSN：1875-8800
Improvement of Stepped Magnetoimpedance Properties by Controlling the Demagnetizing Effect 査読有り

H. Kikuchi, S. Kamata, S. Oe, T. Nakai, S. Hashi, K. Ishiyama

IEEE Transactions on Magnetics　51　(11)　1-4　2015年11月
出版者・発行元： Institute of Electrical and Electronics Engineers (IEEE)
DOI： 10.1109/tmag.2015.2441748 　

ISSN：0018-9464

eISSN：1941-0069
Influence of demagnetizing field on thin-film GMI magnetic sensor elements with uniaxial magnetic anisotropy 査読有り

Hiroaki Kikuchi, Shingo Kamata, Tomoo Nakai, Shuichiro Hashi, Kazushi Ishiyama

Sensors and Actuators A: Physical　230　142-149　2015年7月
出版者・発行元： Elsevier BV
DOI： 10.1016/j.sna.2015.04.027 　

ISSN：0924-4247
Enhancement of Sensitivity on Miniaturized Thin-film Magnetoimpedance with Ellipsoidal Element

Hiroaki Kikuchi, Suguru Oe, Hiroaki Uetake, Shin Yabukami, Tomoo Nakai, Shuichiro Hashi, Kazushi Ishiyama

20TH INTERNATIONAL CONFERENCE ON MAGNETISM, ICM 2015　75　1271-1278　2015年

DOI： 10.1016/j.phpro.2015.12.141 　

ISSN：1875-3892
Investigation of Driving Power Dependence on Magnetoimpedance Properties of Thin-Film Elements With Uniaxial Anisotropy 査読有り

Hiroaki Kikuchi, Shingo Kamata, Yosuke Takahashi, Tomoo Nakai, Shuichiro Hashi, Kazushi Ishiyama

IEEE Transactions on Magnetics　51　(1)　1-4　2015年1月
出版者・発行元： Institute of Electrical and Electronics Engineers (IEEE)
DOI： 10.1109/tmag.2014.2358221 　

ISSN：0018-9464

eISSN：1941-0069
Effects of easy axis direction on the magnetoimpedance properties of thin films with uniaxial anisotropy 査読有り

H. Kikuchi, Y. Takahashi, K. Takahashi, T. Nakai, S. Hashi, K. Ishiyama

JOURNAL OF APPLIED PHYSICS　115　(17)　17A303　2014年5月

DOI： 10.1063/1.4859095 　

ISSN：0021-8979

eISSN：1089-7550
Impedance Variation with Subjecting to Normal Field for the Stepped Giant Magnetoimpedance Element 査読有り

Tomoo Nakai, Kazushi Ishiyama

IEEE Transactions on Magnetics　50　(1)　1-4　2014年1月
出版者・発行元： Institute of Electrical and Electronics Engineers (IEEE)
DOI： 10.1109/tmag.2013.2276741 　

ISSN：0018-9464

eISSN：1941-0069
高周波キャリア型薄膜磁界センサによる磁気探傷試験装置査読有り

37　(1)　1-7　2013年1月
出版者・発行元：
DOI： 10.3379/msjmag.1211r001 　

ISSN：1882-2924

eISSN：1882-2932
高周波キャリア型薄膜磁界センサを利用した磁気探傷の試み

小澤哲也, 谷地館藍, 山田洋, 佐藤弘二, 小島健, 薮上信, 小林伸聖, 中居倫夫, 荒井賢一

電気関係学会東北支部連合大会講演論文集　2011　256-256　2011年
出版者・発行元：電気関係学会東北支部連合大会実行委員会
DOI： 10.11528/tsjc.2011.0_256 　
Scanning System Using Transmission Line Type Thin Film Sensor 査読有り

K. Sato, K. Kojima, S. Yabukami, T. Ozawa, N. Kobayashi, T. Nakai, K.I. Arai

Journal of the Magnetics Society of Japan　35　(2)　76-81　2011年
出版者・発行元： The Magnetics Society of Japan
DOI： 10.3379/msjmag.1102r007 　

ISSN：1882-2924

eISSN：1882-2932
Study of dynamic process of domain change in the stepped giant magnetoimpedance element 査読有り

T Nakai, K Takada, K Ishiyama

Journal of Physics: Conference Series　200　(4)　042019-042019　2010年1月1日
出版者・発行元： IOP Publishing
DOI： 10.1088/1742-6596/200/4/042019 　

eISSN：1742-6596
Existence of Three Stable States of Magnetic Domain for the Stepped Giant Magnetoimpedance Element and Proposal for Sensor With Memory Function 査読有り

T. Nakai, K. Takada, K. Ishiyama

IEEE Transactions on Magnetics　45　(10)　3499-3502　2009年10月
出版者・発行元： Institute of Electrical and Electronics Engineers (IEEE)
DOI： 10.1109/tmag.2009.2022416 　

ISSN：0018-9464
Study of Large Barkhauzen Sensor with Application of Step-like Giant Magnetoimpedance Element 査読有り

T. Nakai, K. Takada, K. Ishiyama

Journal of the Magnetics Society of Japan　33　(3)　287-292　2009年
出版者・発行元： The Magnetics Society of Japan
DOI： 10.3379/msjmag.0903rf8030 　

ISSN：1882-2924

eISSN：1882-2932
Study of hysteresis for steplike giant magnetoimpedance sensor based on magnetic energy 査読有り

T. Nakai, K. Ishiyama, J. Yamasaki

Journal of Magnetism and Magnetic Materials　320　(20)　e958-e962　2008年10月
出版者・発行元： Elsevier BV
DOI： 10.1016/j.jmmm.2008.04.086 　

ISSN：0304-8853
不連続的ＧＭＩ素子におけるインピーダンス不連続点の外部磁界変動に対する安定性査読有り

中居倫夫, 高田健一, 小松迅人, 石山和志

32　(3)　366-370　2008年
出版者・発行元：
DOI： 10.3379/msjmag.32.366 　

ISSN：1882-2924

eISSN：1882-2932
Analysis of steplike change of impedance for thin-film giant magnetoimpedance element with inclined stripe magnetic domain based on magnetic energy 査読有り

T. Nakai, K. Ishiyama, J. Yamasaki

Journal of Applied Physics　101　(9)　2007年5月1日
出版者・発行元： AIP Publishing
DOI： 10.1063/1.2711073 　

ISSN：0021-8979

eISSN：1089-7550

詳細を見る詳細を閉じる

The phenomenon of steplike impedance change for thin-film giant magnetoimpedance (GMI) element was reported. The steplike change happens simultaneously with the appearance or the disappearance of stripe magnetic domain. This phenomenon is obtained for amorphous Co85Nb12Zr3 soft magnetic thin film in a rectangle shape with an in-plane uniaxial easy axis in the direction nearly 60° against the short-side axis of the element. The steplike change of impedance appears in a certain magnitude of external magnetic field. A high-sensitive magnetic field sensor can be realized by applying this phenomenon. In this study, a mechanism of the appearance or the disappearance of inclined stripe magnetic domain is discussed based on an analysis of magnetic domain energy, for the purpose of applying to a high-sensitivity magnetic field sensor. We assume these extremely different magnetic domains as (I) stripe domain with closure domain and (II) single domain, based on experimentally observed domain structures. The result of analysis shows that the magnetic energy of these two phases intersects each other in a certain external magnetic field, which means that the basis of steplike GMI of thin-film element is revealed as a structural change of magnetic domain based on magnetic energy.
不連続的インピーダンス変化特性を有した薄膜GMIセンサと微分回路を組合せた磁界検出方法に関する検討査読有り

中居倫夫, 高田健一, 阿部宏之, 星則光, 鈴木秀夫, 石山和志, 荒井賢一

2007年
Impedance-step phenomenon of thin-film GMI element with inclined magnetic stripe domain 査読有り

T. Nakai, H. Abe, K. I. Arai

The Physics of Metals and Metallography　101　(S1)　S41-S44　2006年7月
出版者・発行元： Pleiades Publishing Ltd
DOI： 10.1134/s0031918x06130138 　

ISSN：0031-918X

eISSN：1555-6190
反射信号を用いた高周波キャリア型磁界センサによる微小交流磁界計測に関する研究査読有り

中居倫夫, 仙道雅彦, 薮上信, 石山和志, 荒井賢一

2006年
端部磁性体を配置した高周波キャリア型磁界センサの感度向上に関する研究査読有り

仙道雅彦, 中居倫夫, 橘奈緒子, 星則光, 鈴木秀夫, 堀越直, 薮上信, 石山和志, 荒井賢一

2006年
Impedance property of thin film GMI sensor with controlled inclined angle of stripe magnetic domain 査読有り

T. Nakai, H. Abe, S. Yabukami, K.I. Arai

Journal of Magnetism and Magnetic Materials　290-291　1355-1358　2005年4月
出版者・発行元： Elsevier BV
DOI： 10.1016/j.jmmm.2004.11.436 　

ISSN：0304-8853
高周波キャリア型磁界センサにおける不連続的インピーダンス変化特性の素子長さ依存性査読有り

中居倫夫, 阿部宏之, 荒井賢一

2005年
不連続的特性を有した高周波キャリア型磁界センサにおけるインピーダンス特性の温度変化査読有り

中居倫夫, 阿部宏之, 荒井賢一

2005年
傾斜磁区構造を有する高周波キャリア型磁界センサにおける検出方向外部磁場による磁区構造変化とインピーダンス変化査読有り

中居倫夫, 薮上信, 荒井賢一

2004年
コプレーナ配置した薄膜磁石バイアス構造を有する高周波キャリア型磁界センサ査読有り

中居倫夫, 山口正洋, 石山和志, 荒井賢一

2004年
マイクロ波測定用プローブを用いたコプレーナ型高周波キャリア型磁界センサの特性評価査読有り

中居倫夫, 阿部宏之, 山口正洋, 薮上信, 菊池弘昭, 荒井賢一

2003年
高周波キャリア型磁界センサにおける傾斜磁区制御方法とインピーダンス特性査読有り

中居倫夫, 阿部宏之, 薮上信, 山口正洋, 荒井賢一

2003年
Remarkable improvement of sensitivity for high-frequency carrier-type magnetic field sensor with ferromagnetic resonance 査読有り

T. Nakai, M. Yamaguchi, H. Kikuchi, H. Iizuka, K.I. Arai

Journal of Magnetism and Magnetic Materials　242-245　1142-1145　2002年4月
出版者・発行元： Elsevier BV
DOI： 10.1016/s0304-8853(01)01305-1 　

ISSN：0304-8853

︎全件表示 ︎最初の5件までを表示

講演・口頭発表等 16

Analysis of Magnetic Domain Transition for Magnetostrictive Co-Nb-Zr Thin Film Strips with Inclined Uniaxial Easy-Axis

Tomoo Nakai

IEEE Intermag 2026　2026年4月13日
Magnetic Domain Transition of Clustered Soft Magnetic Narrow Strips Caused by a Magnetic Small Particle

Tomoo Nakai

IEEE Sensors 2023　2023年10月
Permeability of Clustered Soft Magnetic Narrow Strips Controlled by a Surface Normal Magnetic Field

Tomoo Nakai

IEEE Intermag 2023　2023年6月
Proposal of Electrical Energy Harvester Using Ring-Shape Magnets and FeCo Magnetic Core

Tomoo Nakai

15th International Conference on Motion and Vibration　2020年9月
Magnetic Domain Transition Controlled by Distributed Normal Magnetic Field for Stepped Magneto-Impedance Sensor

Tomoo Nakai

ISEM 2017 (18th International Symposium on Applied Electromagnetics and Mechanics)　2017年9月
Magnetic Domain Observation of Stepped Giant Magneto-Impedance Sensor with Subjecting to Normal Magnetic Field 招待有り

Tomoo Nakai

IEEE Sensors 2015　2015年11月
Thin-Film Giant Magneto-Impedance Sensor with Applying Normal Magnetic Field 招待有り

Tomoo Nakai

2015 Energy Materials Nanotechnology (EMN) Istanbul Meeting　2015年7月
Interaction Between HFC-Type Thin-Film Magnetic Sensor and Small Particle with Subjecting to Strong Normal Field

Tomoo Nakai, Kazushi Ishiyama

59th annual conference on magnetism and magnetic materials (MMM2014)　2014年11月
Reconstruction of Magnetic Domain for the Stepped Giant Magneto-Impedance Element by Applying Normal Field

Tomoo Nakai, Kazushi Ishiyama

The 3rd International Symposium on Advanced Magnetic Materials and Applications (ISAMMA2013)　2013年7月
Study of Dynamics of Domain Change in the Stepped Giant Magneto-Impedance Element

Tomoo Nakai, Kenichi Takada, Kazushi Ishiyama

International Conference on Magnetism (ICM2009)　2009年7月
Existence of Three Stable States of Magnetic Domain for the Stepped Giant Magneto-Impedance Element and a Proposal for a Sensor with Memory Function

Tomoo Nakai, Kenichi Takada, Kazushi Ishiyama

IEEE Intermag 2009　2009年5月
Property of a Step Point Occurrence for the Step-like Giant Magneto-Impedance Phenomenon and Stability of the Step Point Magnetic Field

Tomoo Nakai, Kazushi Ishiyama, Jiro Yamasaki

18th Soft Magnetic Materials Conference (SMM 18)　2007年9月
Mechanism of Step-like Change of Impedance for Thin-film GMI Element with Inclined Stripe Magnetic Domain

Tomoo Nakai, Kazushi Ishiyama, Jiro Yamasaki

10th IEEE MMM/Intermag Conference　2007年1月
Property Control Method of a Thin-Film GMI Sensor Based on Controlling an inclined Angle of Stripe Magnetic Domain

Tomoo Nakai, Hiroyuki Abe, Shin Yabukami, Ken-Ichi Arai

Joint European Magnetic Symposia (JEMS’04)　2004年9月
Impedance Step Phenomenon of Thin-Film GMI Element with Inclined Magnetic Stripe Domain

Tomoo Nakai, Hiroyuki Abe, Ken-Ichi Arai

Euro-Asian Symposium “Trends in Magnetism” (EASTMAG-2004)　2004年8月
Remarkable Improvement of Sensitivity for High-Frequency Carrier-Type Magnetic Field Sensor with Ferromagnetic Resonance

Tomoo Nakai, Masahiro Yamaguchi, Hiroaki Kikuchi, Hisakazu Iizuka, Ken-Ichi Arai

Joint European Magnetic Symposia (JEMS’01)　2001年8月

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共同研究・競争的資金等の研究課題 2

磁気センサ競争的資金
Magnetic sensor 競争的資金