Sato, Tetsuya

写真a

Affiliation

Faculty of Science and Technology, Department of Applied Physics and Physico-Informatics (Yagami)

Position

Professor

E-mail Address

E-mail address

External Links

Career 【 Display / hide

  • 1983.04
    -
    1988.03

    慶應義塾大学, 理工学部, 助手

  • 1988.04
    -
    1994.03

    慶應義塾大学, 理工学部, 専任講師

  • 1993.10
    -
    1995.09

    慶應義塾大学, 学生総合センター, 日吉支部委員

  • 1994.04
    -
    2000.03

    慶應義塾大学, 理工学部, 助教授

  • 1995.10
    -
    1997.03

    慶応義塾大学, 理工学部, 学習指導副主任

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Academic Background 【 Display / hide

  • 1978.03

    Keio University, Faculty of Engineering, 計測工学科

    University, Graduated

  • 1980.03

    Keio University, Graduate School, Division of Engineering, 計測工学専攻

    Graduate School, Completed, Master's course

  • 1983.03

    Keio University, Graduate School, Division of Engineering, 計測工学専攻

    Graduate School, Completed, Doctoral course

Academic Degrees 【 Display / hide

  • 工学 , Keio University, 1983.03

 

Research Areas 【 Display / hide

  • Nanostructural physics (ナノ構造物理)

Research Keywords 【 Display / hide

  • ナノ磁性体、磁気物理

Research Themes 【 Display / hide

  • 量子井戸構造に基づく2次元金属薄膜への磁気機能の誘導とその応用展開, 

    2018.04
    -
    Present

 

Books 【 Display / hide

  • 磁気便覧

    SATO TETSUYA, 丸善出版株式会社, 2016.01

  • 粉体工学ハンドブック

    SATO TETSUYA, 朝倉書店, 2014.02

  • ライフコンジュゲートケミストリー —暮らしと未来を支える化学—

    佐藤 徹哉, 三共出版, 2006.12

  • Mesoscopic Materials and Clusters - Their Pysical and Chemical Properties -

    Tetsuya Sato, Tomoyasu Taniyama, Springer, 1999.03

  • 磁気物性の基礎

    能勢宏,佐藤徹哉, 裳華房, 1997.04

     View Summary

    大学低学年を対象とした磁気物性の入門的教科書4章から成り,第1章 序論,第2章 原子の磁性,第3章 実在物質の磁性,第4章 強磁性.

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Papers 【 Display / hide

  • Manipulation of magnetization in Pd(100) ultrathin films with quantum well structure using modification of Schottky barrier potentials

    Tanabe H., Sakuragi S., Sato T.

    Applied Physics Letters (Applied Physics Letters)  114 ( 5 )  2019.02

    ISSN  00036951

     View Summary

    © 2019 Author(s). The magnetization of Pd(100) ultrathin films that show ferromagnetism due to quantum well states was manipulated by changing the quantum well state with an applied bias voltage. The voltage dependence of the magnetic moment of Pd/SrTiO 3−x /Ti/Au intrinsically depends on the Pd film thickness. The induced change in the magnetic moment is due to the modulation of the phase shift at the interface between the Pd thin film and the semiconductor SrTiO 3−x substrate.

  • Spontaneous distortion via the appearance of ferromagnetism in Pd ultrathin films: Observation of an inverse mechanism for the Stoner criterion

    Sakuragi S., Tajiri H., Kageshima H., Sato T.

    Physical Review B (Physical Review B)  97 ( 21 )  2018.06

    ISSN  24699950

     View Summary

    © 2018 American Physical Society. We study the crystal structure of Pd(100) ultrathin films, which show ferromagnetism induced by the quantum confinement effect, using in situ x-ray crystal truncation rod measurement and density functional calculation. The energy gain from the appearance of ferromagnetism in Pd results in flatter and uniform film growth of ferromagnetic Pd films compared with paramagnetic Pd. In addition, ferromagnetic Pd films expand the out-of-plane lattice constant to suppress the increase in kinetic energy of electrons accompanied by the occurrence of exchange splitting. Although the traditional theory of magnetism in metals indicates that the increase in density of states induces ferromagnetism (Stoner criterion), our present finding reveals a mechanism of modulation in the density of states via the appearance of ferromagnetism, i.e., the inverse mechanism of Stoner's theory.

  • Spontaneous Distortion via the Appearance of Ferromagnetism in Pd Ultrathin Films

    Shunsuke Sakuragi, Hiroo Tajiri, Hiroyuki Kageshima, and Tetsuya Sato

    Physical Review B (American Physical Society)  97 ( 21 ) 214421/1 - 214421/5 2018.06

    Research paper (scientific journal), Joint Work, Accepted

  • Change in magnetization of ferromagnetic Pd(001) ultrathin films induced by the strain effect of BaTiO<inf>3</inf>

    Ban Y., Komatsu K., Sakuragi S., Taniyama T., Kageshima H., Sato T.

    Applied Physics Letters (Applied Physics Letters)  112 ( 14 )  2018.04

    ISSN  00036951

     View Summary

    © 2018 Author(s). We demonstrate changes in the saturation magnetization of Pd(001) ultrathin films exhibiting ferromagnetism in Pd/SrTiO3/BaTiO3 heterostructures due to the strain effect caused by the structural phase transition of BaTiO3 substrates. When a BaTiO3 substrate with a single domain formed by voltage application transitioned from the orthorhombic phase to the tetragonal phase, the saturation magnetization of Pd decreased by about 5%. The first-principles calculations, which assumed the distortion accompanied by the orthorhombic to the tetragonal structural phase transition, indicated a decrease by 3%-4% in the magnetization, which was consistent with the experimental results.

  • Nanoscale Mosaic Works: Tetragonal Lattices of Iso-oriented Heterogeneous Nanocubes

    Riho Matsumoto, Hiroya Yamazaki, Mihiro Takasaki, Yuya Oaki, Tetsuya Sato, Hiroaki Imai

    Langmuir (ACS Publications)  34 ( 13 ) 4031 - 4035 2018.04

    Research paper (scientific journal), Joint Work, Accepted

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Papers, etc., Registered in KOARA 【 Display / hide

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Presentations 【 Display / hide

  • B20型Cr0.81Mn0.19Geにおける異常ホール効果測定

    渡辺和貴,石藤涼,井口亮,内田健一,佐藤徹哉

    日本物理学会 第74回年次大会 (福岡県・福岡市) , 2019.03, Poster (general), 日本物理学会

  • Mn3O4ナノブロック秩序配列構造体の磁気特性

    溝口剛史,清水真琴,松本里穂、高崎美宏,今井宏明,佐藤徹哉

    日本物理学会 第74回年次大会 (福岡県・福岡市) , 2019.03, Poster (general), 日本物理学会

  • Pt(100)超薄膜に量子井戸状態に起因して生じる強磁性およびその経時変化

    山口智史,佐藤徹哉

    日本物理学会 第74回年次大会 (福岡県・福岡市) , 2019.03, Poster (general), 日本物理学会

  • BaTiO3の局在電場を用いたPt微粒子の磁性変調

    山崎寛也,松本里穂,高崎美宏,今井宏明,佐藤徹哉

    日本物理学会 第74回年次大会 (福岡県・福岡市) , 2019.03, Poster (general), 日本物理学会

  • ショットキー障壁の変化を利用した量子井戸構造を有するPd(100)薄膜の磁気特性変化II

    田辺秀崇,櫻木俊輔,佐藤徹哉

    日本物理学会 第74回年次大会 (福岡県・福岡市) , 2019.03, Poster (general), 日本物理学会

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Research Projects of Competitive Funds, etc. 【 Display / hide

  • Magnetic anisotropy control of adjacent magnetic thin films using electrical manipulation of quantum well states in 4d / 5d metal thin films

    2019.04
    -
    2022.03

    MEXT,JSPS, Grant-in-Aid for Scientific Research, 佐藤 徹哉, Grant-in-Aid for Scientific Research (C), Principal Investigator

  • Verification of skyrmion showing spin glass like magnetism and investigation of its structure and dynamic properties

    2016.04
    -
    2018.03

    Keio Gijuku Academic Development Funds, Research grant, Principal Investigator

  • 量子井戸構造に基づく2次元金属薄膜への磁気機能の誘導とその応用展開

    2015.04
    -
    2019.03

    Grant-in-Aid for Scientific Research, 佐藤徹哉, Research grant, Principal Investigator

  • 局在表面プラズモン共鳴に伴う高周波高電場を用いた磁気異方性制御及び磁気秩序操作

    2014.04
    -
    2016.03

    Grant-in-Aid for Scientific Research, 佐藤徹哉, Research grant, Principal Investigator

  • 磁性クラスターを用いた磁性ハイパーサーミアの研究

    2013.04
    -
    2014.03

    Keio Gijuku Academic Development Funds, 佐藤徹哉, Research grant, Principal Investigator

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Intellectual Property Rights, etc. 【 Display / hide

  • 波長可変カーボンナノチューブ素子

    Application No.: 2006-325421  2006.12 

    Patent, Joint

  • 電界制御磁性素子及び電界制御磁気メモリ素子

    Application No.: 2006-72031  2006.03 

    Patent, Joint

Awards 【 Display / hide

  • 日本材料科学会功労賞

    2013.06, 日本材料科学会

    Type of Award: Awards of National Conference, Council and Symposium

  • 日本磁気学会出版賞

    能勢宏、佐藤徹哉, 2009.09, 磁気工学の基礎

    Type of Award: Awards of National Conference, Council and Symposium

 

Courses Taught 【 Display / hide

  • SOLID STATE PHYSICS

    2020

  • PRESENTATION TECHNIQUE

    2020

  • NANO SCALE SCIENCE JOINT SEMINAR

    2020

  • MATERIAL DESIGN SCIENCE JOINT SEMINAR

    2020

  • MAGNETICS

    2020

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Memberships in Academic Societies 【 Display / hide

  • 日本放射光学会

     
  • 日本物理学会

     
  • 応用物理学会

     
  • 日本磁気学会

     
  • 日本材料科学会

     

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Committee Experiences 【 Display / hide

  • 2018.06
    -
    Present

    評議員, 日本材料科学会

  • 2016.04
    -
    Present

    SPring-8/SACLA成果審査委員会査読者, 高輝度光科学研究センター

  • 2015.06
    -
    2017.05

    評議員, 日本材料科学会

  • 2014.12
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    2016.11

    科学研究費委員会専門委員, 日本学術振興会

  • 2013.09
    -
    2014.09

    第38回磁気学会現地実行委員会委員長, 日本磁気学会

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