Research Interests 【 display / non-display 】

Research Interests 【 display / non-display 】

Graduating School 【 display / non-display 】

Graduating School 【 display / non-display 】

• 　

  -

  1983.03

  Tohoku University     Graduated

Graduate School 【 display / non-display 】

Graduate School 【 display / non-display 】

• 　

  -

  1988.03

  Tohoku University  Graduate School, Division of Engineering  Doctor's Course  Completed

Degree 【 display / non-display 】

Degree 【 display / non-display 】

• Tohoku University -  Doctor of Engineering

Campus Career 【 display / non-display 】

Campus Career 【 display / non-display 】

• 2018.04

  -

  Now

  Akita University   Graduate School of Engineering Science   Department of Mathematical Science and Electrical-Electronic-Computer Engineering   Electrical and Electronic Engineering Course   Professor  

• 2016.04

  -

  2018.03

  Akita University   Graduate School of Engineering Science   Research Center for Engineering Science   Professor  

• 2006.04

  -

  2016.03

  Akita University   Reseach Institute of Materials and Resources   Professor  

• 1998.07

  -

  2005.03

  Akita University   Department of Material Science and Engineering   Associate Professor  

• 1994.10

  -

  1998.03

  Akita University   Faculty of Engineering and Resource Science   Lecturer  

Research Achievements 【 display / non-display 】

Research Achievements 【 display / non-display 】

◆Original paper【 display / non-display 】

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◆Original paper【 display / non-display 】

High-resolution alternating magnetic force microscopy using an amorphous FeB-based tip driven by an inverse magnetostrictive effect: Imaging of the high-density magnetic recording media

M.V. Makarova, Y. Akaishi, Y. Suzuki, K.S. Rao, S.Yoshimura, H. Saito

Journal of Magnetism and Magnetic Materials   546   168755   2022.02  [Refereed]

Research paper (journal)   Domestic Co-author

DOI

3D Magnetic Field Vector Measurement by Magneto-Optical Imaging

Sakaguchi H., Oya R., Wada S., Matsumura T., Saito H., Ishibashi T.

Journal of the Magnetics Society of Japan ( Journal of the Magnetics Society of Japan )  46 ( 2 ) 37 - 41   2022.01  [Refereed]

Research paper (journal)   Domestic Co-author

<p>  Magneto-optical (MO) imaging using MO imaging plates is a magnetic imaging technique that enables real-time measurements and is expected to be used for non-destructive testing and for observing the magnetic domains of magnetic materials. In this study, we propose a quantitative measurement method for three dimensional (3D) magnetic field vector measurements. The x- and y-components of the magnetic fields within the measured plane are calculated from the measured z-component by using a signal transformation method based on magnetic field transfer functions. Furthermore, the magnetic field distributions at different heights are also obtained from a one-shot image. In this paper, 3D magnetic field vector measurements are demonstrated for ferrite magnets and an electrical steel sheet.</p>

DOI CiNii Research

Direct visualization of magnetic domain wall motion in Nd-Fe-B magnets by alternating magnetic force microscopy using Co-GdO<inf>x</inf> superparamagnetic tip

Yongze Cao, Yue Zhao, Jin Tang, Haifeng Du, Yan Zhou, Hitoshi Saito

Ultramicroscopy   212   112980   2020.05  [Refereed]

Research paper (journal)   International Co-author

DOI

Alternating Magnetic Force Microscopy: Effect of Si doping on the temporal performance degradation of amorphous FeCoB magnetic tips

M.V. Makarova, Y. Akaishi, T. Ikarashi, K.S. Rao, S. Yoshimura, H. Saito

Journal of Magnetism and Magnetic Materials   471   209 - 214   2019.02  [Refereed]

Research paper (journal)   International Co-author

High coecivity and resolution FePt・MgO –coated tip for imaging the magnetic field of perpendicular magnetic write head by alternating magnetic force microscopy (A-MFM)

F. Zheng, S. Yoshimura, S. Yasui, G. Egawa, and H. Saito

Journal of Magnetic Society Japan   43 ( 1 ) 6 - 10   2019.01  [Refereed]

Research paper (journal)   International Co-author

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◆Introduction and explanation【 display / non-display 】

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◆Introduction and explanation【 display / non-display 】

Magnetic Force Microscopy

  52 ( 3 ) 124 - 128   2017.12

Introduction and explanation (others)   Single author

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◆International conference proceedings【 display / non-display 】

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◆International conference proceedings【 display / non-display 】

A new method: study on individual magnetic nanoparticles by frequency-modulated magnetic force microscopy

Xiang Li, Zhenghua Li, Deng Pan, Satoru yoshimura, Hitoshi Saito

IEEE Transactions on Magnetics     2014.02  [Refereed]

Research paper (international conference proceedings)   Domestic Co-author

Fabrication of high-coercivity FePt-MgO tips for magnetic force microscopy and direct measurement of tip-coercivity by pulse magnetic field

Fu Zheng, Shinya Yasui, Genta Egawa, Yukinori Kinoshita, Satoru Yoshimura, Hitoshi Saito

Proceedings of the 7th International Conference on Materials Engineering for Resources (ICMR2013AKITA)     pp.239-243   2013.11  [Refereed]

Research paper (international conference proceedings)   Domestic Co-author

Fabrication of (001) oriented TMR film with highly ordered L10-Fe(Pd,Pt) alloy films by using a very thin Fe underlayer

Satoru Yoshimura, Shogo Omiya, Genta Egawa, and Hitoshi Saito

IEEE Transactions on Magnetics   47(10)   4417-4420   2011.10  [Refereed]

Research paper (international conference proceedings)   Domestic Co-author

MFM analysis of magnetic inhomogeneity in recorded area for perpendicular magnetic recording media by simultaneous imaging of perpendicular and in-plane magnetic field gradient

Satoru Yoshimura, Genta Egawa, Tasuku Miyazawa, Zhenghua Li, Hitoshi Saito, Jianmin Bai, Guoqing Li

Journal of Physics: Conference Series   266(1)   012065   2011.01  [Refereed]

Research paper (international conference proceedings)   Domestic Co-author

Linearity of Giant Hall resistivity versus magnetic field in Fe/Pt/[CoFe/Pt]n/Fe/Pt multilayers

M F Liu, X C Song, H Lv, L R Zhang, J M Bai, F L Wei, S Yoshimura, H Saito

Journal of Physics: Conference Series   266(1)   012003   2011.01  [Refereed]

Research paper (international conference proceedings)   Domestic Co-author

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◆Other【 display / non-display 】

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◆Other【 display / non-display 】

Conversion of Measuring Magnetic Field Direction by Tip Transfer Function on Magnetic Field Microscopy

Wada Shu, Zhao Yue, Matsumura Toru, Saito Hitoshi

JSAP Annual Meetings Extended Abstracts ( The Japan Society of Applied Physics )  2020.1 ( 0 ) 1491 - 1491   2020.02

DOI CiNii Research

High Coercivity and Resolution FePt•MgO-coated Tip for Imaging the Magnetic Field of Perpendicular Magnetic Write Head by Alternating Magnetic Force Microscopy (A-MFM)

Journal of the Magnetics Society of Japan ( The Magnetics Society of Japan )  43 ( 1 ) 6 - 10   2019.01

DOI CiNii Research

Basic Study of Electric Field Induced Magnetization Reversal of Multiferroic (Bi_1-xBa_x)FeO₃ Thin Films at Room Temperature for Magnetic Recording Technology

( The Magnetics Society of Japan )  42 ( 2 ) 11 - 14   2018

DOI CiNii Research

Magnetic Force Microscopy

Saito Hitoshi

KENBIKYO ( The Japanese Society of Microscopy )  52 ( 3 ) 124 - 128   2017

<p>Magnetic force microscopy (MFM) is a widely used magnetic imaging technique, because MFM has a few ten nm spatial resolution and no need of special pretreatment. In recent years, the improvement of spatial resolution and functionalities is required for the research and development of magnetic materials and magnetic devices. We have developed a novel form of magnetic force microscopy called alternating magnetic force microscopy (A-MFM) for the imaging of DC and AC magnetic fields with the ultra high spatial resolution of less than 5 nm. A-MFM utilizes the frequency modulation of cantilever oscillation induced by applying off-resonant alternating magnetic force to a highly sensitive homemade magnetic tip. A-MFM is the first magnetic force microscopy technique that enables near-surface magnetic imaging. A-MFM has several new functionalities including a) zero detection of magnetic field, b) polarity detection of magnetic field and surface magnetic charge (N pole / S pole), c) stroboscopic AC magnetic field imaging, and d) DC magnetic field imaging with selectable measuring axis even at rough surfaces such as the fractured surface of permanent magnets. In this article, the recent progress of A-MFM is reported.</p>

DOI CiNii Research

Presentations 【 display / non-display 】

Presentations 【 display / non-display 】

• High-resolution magnetic imaging of magnetic transition region of perpendicular magnetic recording media by alternating magnetic force microscopy with sensitive amorphous FeCoB soft magnetic tip with high magnetostriction

  H. Saito, H. Tanaka, T. Matsumura

  2022 Joint MMM-Intermag  2022.01  -  2022.01 

• Evaluation of Microwave-Frequency Magnetic Field Response of MFM Tip Coated by Superparamagnetic Co-GdOx Granular Alloy Film

  S. Sato, T. Matsumura, H. Sonobe, H. Saito

  ICMR2021  2021.10  -  2021.10 

• Three-dimensional magnetic field gradient imaging of permanent magnet by alternating magnetic force microscopy : Transformation of measuring magnetic field direction based on MFM tip transfer function

  H. Saito, S. Wada, T. Matsumura

  INTERMAG21  2021.04  -  2021.04 

• Local magnetization measurement of magnetic recording head by detecting energy cross term of DC and AC magnetic field by alternating magnetic force microscopy

  2019.09  -  2019.09 

• Dynamic observation of domain wall movement of patterned permalloy thin films

  2019.09  -  2019.09 

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