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2018 Fiscal Year Annual Research Report

Thermodynamic Spin Conversion

Planned Research

Project Areanano spin conversion science
Project/Area Number 26103005
Research InstitutionThe University of Tokyo

Principal Investigator

齊藤 英治  東京大学, 大学院工学系研究科(工学部), 教授 (80338251)

Co-Investigator(Kenkyū-buntansha) 高梨 弘毅  東北大学, 金属材料研究所, 教授 (00187981)
小野 正雄  国立研究開発法人日本原子力研究開発機構, 原子力科学研究部門 原子力科学研究所 先端基礎研究センター, 研究副主幹 (50370375)
Project Period (FY) 2014-07-10 – 2019-03-31
Keywordsスピン流 / スピントロニクス / 磁性物理 / スピンメカニクス
Outline of Annual Research Achievements

本研究では、機械運動・熱・波動・音・電気とのスピン変換及び相互作用現象を開拓する。これにより、スピン変換の学理構築を推進するとともに、スピンを利用した新たなエネルギー変換科学技術の体系を創出する。平成30年度の主な成果は以下の通りである。
(1) 反強磁性相転移を利用したスピン流ON/OFF変換機能を実現:反強磁性体の相転移を利用して、スピン流の流れやすさを変換できる機能を実現した。Cr2O3は、反強磁性相転移の前後でスピン流に対する導体から絶縁体に変わることを見いだし、スピン流の流れやすさを500%変化させることに成功した (Nature Materials誌に掲載)。
(2) 核スピンに由来したマイクロ波-スピン流変換現象を発見:原子核の自転運動である核スピンを利用し、マイクロ波照射により核スピンの集団歳差運動を誘起することでスピン流を生成することに成功した。電子のスピン自由度に依存していた従来のスピン変換現象に対して、核スピンが利用可能であることを実証した (Nature Physics誌に掲載)。
(3) 渦糸液体状態に起因した環境ノイズ-電力変換現象を発見:磁気渦糸液体状態の第二種超伝導体MoGeとフェリ磁性体の接合素子は、環境の電磁ノイズを定常的な起電力に変換できることを発見した。磁場依存性、温度依存性、環境変化に対する応答を詳細に検証し、本現象が渦糸の空間不均一性に起因することを突き止めた (Nature Communications誌に掲載)。
(4)バーネット磁場を用いた角運動量の精密測定法を開発:これまで測定が困難だった磁石内部の角運動量を、磁石の剛体回転との相互作用を利用して測定する手法および装置を開発し、実際にフェリ磁性体の角運動量補償点を正確に測定することに成功した (Applied Physics Letters誌に掲載)。

Research Progress Status

平成30年度が最終年度であるため、記入しない。

Strategy for Future Research Activity

平成30年度が最終年度であるため、記入しない。

  • Research Products

    (27 results)

All 2019 2018 Other

All Journal Article (19 results) (of which Int'l Joint Research: 10 results,  Peer Reviewed: 19 results,  Open Access: 2 results) Presentation (7 results) (of which Int'l Joint Research: 5 results,  Invited: 7 results) Remarks (1 results)

  • [Journal Article] Spin pumping from nuclear spin waves2019

    • Author(s)
      Y. Shiomi, J. Lustikova, S. Watanabe, D. Hirobe, S. Takahashi, and E. Saitoh
    • Journal Title

      Nature Physics

      Volume: 15 Pages: 22~26

    • DOI

      10.1038/s41567-018-0310-x

    • Peer Reviewed
  • [Journal Article] Thickness dependence of transverse thermoelectric voltage in Co40Fe60/YIG magnetic junctions2019

    • Author(s)
      P. Wongjom, R. Ramos, S. Pinitsoontorn, K.Uchida, and E. Saitoh
    • Journal Title

      Journal of Magnetism and Magnetic Materials

      Volume: 471 Pages: 439~443

    • DOI

      10.1016/j.jmmm.2018.10.003

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Machine-learning guided discovery of a new thermoelectric material2019

    • Author(s)
      Y. Iwasaki, V. Stanev, AG. Kusne, M. Ishida, A. Kirihara, K. Ihara, R. Sawada, K. Terashima, H. Someya, K. Uchida, E. Saitoh, and S. Yorozu
    • Journal Title

      Scientific Reports

      Volume: 9 Pages: 2751~2751

    • DOI

      10.1038/s41598-019-39278-z

    • Peer Reviewed / Open Access
  • [Journal Article] The bimodal distribution spin Seebeck effect enhancement in epitaxial Ni0.65Zn0.35Al0.8Fe1.2O4 thin film2018

    • Author(s)
      H. Wang, D. Hou, T. Kikkawa, R. Ramos, K. Shen, ZY. Qiu, Y. Chen, M. Umeda, Y. Shiomi, XF. Jin, and E. Saitoh
    • Journal Title

      Applied Physics Letters

      Volume: 112 Pages: 142406~142406

    • DOI

      10.1063/1.5022195

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Spin colossal magnetoresistance in an antiferromagnetic insulator2018

    • Author(s)
      ZY. Qiu, D. Hou, J. Barker, K. Yamamoto, O. Gomonay, and E. Saitoh
    • Journal Title

      Nature Materials

      Volume: 17 Pages: 577~580

    • DOI

      10.1038/s41563-018-0087-4

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Lock-in thermography measurements of the spin Peltier effect in a compensated ferrimagnet and its comparison to the spin Seebeck effect2018

    • Author(s)
      A. Yagmur, R. Iguchi, S. Geprags, A. Erb, S. Daimon, E. Saitoh, R. Gross, and K. Uchida
    • Journal Title

      Journal of Physics D: Applied Physics

      Volume: 51 Pages: 194002~194002

    • DOI

      10.1088/1361-6463/aabc75

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Observation of anisotropic magneto-Peltier effect in nickel2018

    • Author(s)
      K. Uchida, S. Daimon, R. Iguchi, and E. Saitoh
    • Journal Title

      Nature

      Volume: 558 Pages: 95~99

    • DOI

      10.1038/s41586-018-0143-x

    • Peer Reviewed
  • [Journal Article] Frequency and wavenumber selective excitation of spin waves through coherent energy transfer from elastic waves2018

    • Author(s)
      Y. Hashimoto, D. Bossini, TH. Johansen, E. Saitoh, A. Kirilyuk, and T. Rasing
    • Journal Title

      Physical Review B

      Volume: 97 Pages: 140404~140404

    • DOI

      10.1103/PhysRevB.97.140404

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Enhanced thermo-spin effects in iron-oxide/metal multilayers2018

    • Author(s)
      R. Ramos, I. Lucas, PA. Algarabel, L. Morellon, K. Uchida, E. Saitoh, and MR. Ibarra
    • Journal Title

      Journal of Physics D: Applied Physics

      Volume: 51 Pages: 224003~224003

    • DOI

      10.1088/1361-6463/aabedb

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Thermographic measurements of spin-current-induced temperature modulation in metallic bilayers2018

    • Author(s)
      R. Iguchi, A. Yagmur, Y.-C. Lau, S. Daimon, E. Saitoh, M. Hayashi, and K. Uchida
    • Journal Title

      Physical Review B

      Volume: 98 Pages: 014402~014402

    • DOI

      10.1103/PhysRevB.98.014402

    • Peer Reviewed
  • [Journal Article] Spin-current coherence peak in superconductor/magnet junctions2018

    • Author(s)
      M. Umeda, Y. Shiomi, T. Kikkawa, T. Niizeki, J. Lustikova, S. Takahashi, and E. Saitoh
    • Journal Title

      Applied Physics Letters

      Volume: 112 Pages: 232601~232601

    • DOI

      10.1063/1.5027456

    • Peer Reviewed
  • [Journal Article] Spin transport in multilayer systems with fully epitaxial NiO thin films2018

    • Author(s)
      L. Baldrati, C. Schneider, T. Niizeki, R. Ramos, J. Cramer, A. Ross, E. Saitoh, and M. Klaui
    • Journal Title

      Physical Review B

      Volume: 98 Pages: 014409~014409

    • DOI

      10.1103/PhysRevB.98.014409

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Observation of gyromagnetic reversal2018

    • Author(s)
      M. Imai, Y. Ogata, H. Chudo, M. Ono, K. Harii, M. Matsuo, Y. Ohnuma, S. Maekawa, and E. Saitoh
    • Journal Title

      Applied Physics Letters

      Volume: 113 Pages: 052402~052402

    • DOI

      10.1063/1.5041464

    • Peer Reviewed
  • [Journal Article] Full angular dependence of the spin Hall and ordinary magnetoresistance in epitaxial antiferromagnetic NiO(001)/Pt thin films2018

    • Author(s)
      L. Baldrati, A. Ross, T. Niizeki, C. Schneider, R. Ramos, J. Cramer, O. Gomonay, M. Filianina, T. Savchenko, D. Heinze, A. Kleibert, E. Saitoh, J. Sinova, and M. Klaui
    • Journal Title

      Physical Review B

      Volume: 98 Pages: 024422~024422

    • DOI

      10.1103/PhysRevB.98.024422

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Efficient Edelstein effects in one-atom-layer Tl-Pb compound2018

    • Author(s)
      Y. Shiomi, K. T. Yamamoto, R. Nakanishi, T. Nakamura, S. Ichinokura, R. Akiyama, S. Hasegawa, and E. Saitoh
    • Journal Title

      Applied Physics Letters

      Volume: 113 Pages: 052401~052401

    • DOI

      10.1063/1.5040546

    • Peer Reviewed
  • [Journal Article] 180 degrees-phase shift of magnetoelastic waves observed by phase-resolved spin-wave tomography2018

    • Author(s)
      Y. Hashimoto, TH. Johansen, and E. Saitoh
    • Journal Title

      Applied Physics Letters

      Volume: 112 Pages: 232403~232403

    • DOI

      10.1063/1.5030342

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Direct probing of cross-plane thermal properties of ALD Al2O3/ZnO superlattice films with improved figure of merit and their cross-plane thermoelectric generating performance2018

    • Author(s)
      NW. Park, WY. Lee, YS. Yoon, JY. Ahn, JH. Lee, GS. Kim, TG. Kim, CJ. Choi, JS. Park, E. Saitoh, and SK. Lee
    • Journal Title

      ACS Applied Materials & Interfaces

      Volume: 10 Pages: 44472~44482

    • DOI

      10.1021/acsami.8b15997

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Fabrication of yttrium-iron-garnet/Pt multilayers for the longitudinal spin Seebeck effect2018

    • Author(s)
      T. Nozue, T. Kikkawa, T. Watamura, T. Niizeki, R. Ramos, E. Saitoh, and H. Murakami
    • Journal Title

      Applied Physics Letters

      Volume: 113 Pages: 262402~262402

    • DOI

      10.1063/1.5046977

    • Peer Reviewed
  • [Journal Article] Vortex rectenna powered by environmental fluctuations2018

    • Author(s)
      J. Lustikova, Y. Shiomi, N. Yokoi, N. Kabeya, N. Kimura, K. Ienaga, S. Kaneko, S. Okuma, S. Takahashi, and E. Saitoh
    • Journal Title

      Nature Communications

      Volume: 9 Pages: 4922~4922

    • DOI

      10.1038/s41467-018-07352-1

    • Peer Reviewed / Open Access
  • [Presentation] Spin Current in Uniaxial Antiferromagnets and Quantum Spin Liquids2019

    • Author(s)
      齊藤英治
    • Organizer
      2019 Joint MMM-Intermag Conference
    • Int'l Joint Research / Invited
  • [Presentation] Spin current in quantum spin liquids and superconductions2019

    • Author(s)
      齊藤英治
    • Organizer
      Topological Phases and Functionality of Correlated Electron Systems 2019
    • Int'l Joint Research / Invited
  • [Presentation] YIG Spintronics2018

    • Author(s)
      齊藤英治
    • Organizer
      Spin Cavitronics
    • Int'l Joint Research / Invited
  • [Presentation] Phonon and nuclear spin in spin current physics2018

    • Author(s)
      齊藤英治
    • Organizer
      2018 Spin Caloritronics IX
    • Int'l Joint Research / Invited
  • [Presentation] 固体の素励起とスピン流2018

    • Author(s)
      齊藤英治
    • Organizer
      日本物理学会2018年秋季大会 新学術領域研究(研究領域提案型)「ナノスピン変換科学」共催シンポジウム ナノスピン変換から強結合スピントロニクスへ
    • Invited
  • [Presentation] スピン流の科学(プレナリー講演)2018

    • Author(s)
      齊藤英治
    • Organizer
      第47回結晶成長国内会議
    • Invited
  • [Presentation] Various spin current phenomena in condensed matter2018

    • Author(s)
      齊藤英治
    • Organizer
      The Workshop on Innovative Nanoscale Devices and Systems 2018
    • Int'l Joint Research / Invited
  • [Remarks] 齊藤研究室

    • URL

      http://saitoh.t.u-tokyo.ac.jp

URL: 

Published: 2019-12-27  

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