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Spin transport in magnetic nanoparticles

Research Project

Project/Area Number 21K14519
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 29010:Applied physical properties-related
Research InstitutionIwate University

Principal Investigator

Oyanagi Koichi  岩手大学, 理工学部, 助教 (50881223)

Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2023: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000)
Fiscal Year 2022: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Fiscal Year 2021: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Keywordsスピントロニクス / スピン流 / スピンゼーベック効果 / 常磁性絶縁体 / ナノ粒子 / 磁性ナノ粒子
Outline of Research at the Start

スピントロニクス分野では、電子の持つ電荷の自由度に加えスピンの自由度をも利用した電子デバイスの開発が行われている。本研究では、近年、優れたスピン流輸送特性を示す常磁性絶縁体を用いたスピントロニクスを発展させ、強いゆらぎを示す磁性ナノ粒子の超常磁性を用いた新たなスピン流現象を実証する。これにより新たなスピントロニクス素子の開発に繋がる新たなスピン流材料を開拓する。

Outline of Final Research Achievements

In the field of spintronics, development of electronic devices utilizing the spin degree of freedom as well as the charge degree of freedom of electrons is underway. Recently, spintronics with paramagnetic insulators is getting much attention because they are found to show excellent spin current transport properties. To this end, we have (1) clarified the mechanism of thermal spin current generation at the paramagnetic insulator/metal interface and (2) fabricated magnetic nanoparticles to demonstrate a new spin current phenomenon using magnetic nanoparticles that show strong fluctuations.

Academic Significance and Societal Importance of the Research Achievements

本研究の学術的意義は、磁性ナノ粒子を用いたスピントロニクス材料を開発することである。特に、磁性ナノ粒子が示す超常磁性は、優れたスピン流輸送特性を示す常磁性絶縁体の利点を室温・低磁場で利用できる可能性を秘めている。本研究によって、常磁性絶縁体で生じる熱的スピン流生成現象の原理が解明されたこと、および、自己組織化によって磁性ナノ粒子の薄膜上の試料を得るための条件が明らかになったこと、で超常磁性や常磁性を示すスピントロニクス材料の設計指針を得ることができた。

Report

(4 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • Research Products

    (8 results)

All 2024 2023 2022 2021 Other

All Journal Article (6 results) (of which Int'l Joint Research: 3 results,  Peer Reviewed: 6 results,  Open Access: 2 results) Presentation (1 results) Remarks (1 results)

  • [Journal Article] Fabrication of hyperbranched-polyglycidol-Fe3O4 nanocomposite labeled with fluorescein isothiocyanate via rapid ligand exchange reaction2024

    • Author(s)
      Kawamura Ayane、Saijyo Mirai、Bayarkhuu Boldbaatar、Nishidate Naoki、Oikawa Ibuki、Kobayashi Satoru、Oyanagi Koichi、Shiba Yoko、Tsukamoto Tadashi、Oishi Yoshiyuki、Shibasaki Yuji
    • Journal Title

      Polymer

      Volume: 294 Pages: 126724-126724

    • DOI

      10.1016/j.polymer.2024.126724

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Mechanism of paramagnetic spin Seebeck effect2023

    • Author(s)
      Oyanagi Koichi、Takahashi Saburo、Kikkawa Takashi、Saitoh Eiji
    • Journal Title

      Physical Review B

      Volume: 107 Issue: 1 Pages: 014423-014423

    • DOI

      10.1103/physrevb.107.014423

    • Related Report
      2022 Research-status Report
    • Peer Reviewed
  • [Journal Article] Anomalous Ettingshausen effect in iron-carbon alloys2022

    • Author(s)
      Nagasawa Ren、Oyanagi Koichi、Hirai Takamasa、Modak Rajkumar、Kobayashi Satoru、Uchida Ken-ichi
    • Journal Title

      Applied Physics Letters

      Volume: 121 Issue: 6 Pages: 062401-062401

    • DOI

      10.1063/5.0103248

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Composition-tunable magnon-polaron anomalies in spin Seebeck effects in epitaxial BixY3-xFe5O12 films2022

    • Author(s)
      Kikkawa Takashi、Oyanagi Koichi、Hioki Tomosato、Ishida Masahiko、Qiu Zhiyong、Ramos Rafael、Hashimoto Yusuke、Saitoh Eiji
    • Journal Title

      Physical Review Materials

      Volume: 6 Issue: 10 Pages: 104402-104402

    • DOI

      10.1103/physrevmaterials.6.104402

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Deciphering quantum fingerprints in electric conductance2022

    • Author(s)
      Daimon Shunsuke、Tsunekawa Kakeru、Kawakami Shinji、Kikkawa Takashi、Ramos Rafael、Oyanagi Koichi、Ohtsuki Tomi、Saitoh Eiji
    • Journal Title

      Nature Communications

      Volume: 13 Issue: 1 Pages: 3160-3160

    • DOI

      10.1038/s41467-022-30767-w

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Paramagnetic spin Hall magnetoresistance2021

    • Author(s)
      Koichi Oyanagi, Juan M. Gomez-Perez, Xian-Peng Zhang, Takashi Kikkawa, Yao Chen, Edurne Sagasta, Andrey Chuvilin, Luis E. Hueso, Vitaly N. Golovach, F. Sebastian Bergeret, Felix Casanova, and Eiji Saitoh
    • Journal Title

      Physical Review B

      Volume: 104 Issue: 13 Pages: 1344281-14

    • DOI

      10.1103/physrevb.104.134428

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] Transverse magneto-thermoelectric conversion in sintered Co2MnGa slab2023

    • Author(s)
      Kenta Takamori、〇Koichi Oyanagi、Takumi Imamura、Ren Nagasawa、Krishnan Mahalingam、Takamasa Hirai、Satoru Kobayashi、Ken-ichi Uchida
    • Organizer
      The 70th JSAP Spring Meeting 2023
    • Related Report
      2022 Research-status Report
  • [Remarks] 個人ウェブサイト

    • URL

      https://koichioyanagi.com/

    • Related Report
      2023 Annual Research Report

URL: 

Published: 2021-04-28   Modified: 2025-01-30  

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