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Magnetization reversal by controlling a perpendicular magnetic layer / semiconductor interface

Research Project

Project/Area Number 25600011
Research Category

Grant-in-Aid for Challenging Exploratory Research

Allocation TypeMulti-year Fund
Research Field Nanostructural physics
Research InstitutionTohoku University

Principal Investigator

KOHDA Makoto  東北大学, 工学(系)研究科(研究院), 准教授 (00420000)

Co-Investigator(Renkei-kenkyūsha) NITTA Junsaku  東北大学, 大学院工学研究科, 教授 (00393778)
Project Period (FY) 2013-04-01 – 2015-03-31
Project Status Completed (Fiscal Year 2014)
Budget Amount *help
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2014: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2013: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
Keywordsスピン軌道相互作用 / Co/Pt / スピンホール効果 / 磁化反転 / 垂直磁気異方性 / スピントロニクス / 強磁性金属 / スピントルク
Outline of Final Research Achievements

Spin orbit interaction in Pt/Co/AlO is widely debated throughout reported literature with causes varying between the Rashba and spin Hall effect and measured strengths varying up to 2 orders of magnitude. To resolve the inconsistency, films of varying interlayer thicknesses as well as material compositions were fabricated, measured and corresponded to the associated spin orbit interaction origin based on theory. We confirmed the control of spin orbit torque by changing the thickness of Pt and Co layers. The measurement method of the present experiment addresses the errors associated with previous methods due to heating.

Report

(3 results)
  • 2014 Annual Research Report   Final Research Report ( PDF )
  • 2013 Research-status Report
  • Research Products

    (11 results)

All 2015 2014 2013 Other

All Journal Article (6 results) (of which Peer Reviewed: 6 results,  Open Access: 3 results,  Acknowledgement Compliant: 2 results) Presentation (3 results) Remarks (2 results)

  • [Journal Article] Layer thickness dependence of spin orbit torques and fields in Pt/Co/AlO trilayer structures2015

    • Author(s)
      T. Yang, M. Kong, M. Kohda, T. Seki, K. Takanashi, and J. Nitta
    • Journal Title

      Jpn. J. Appl. Phys.

      Volume: 54 Issue: 4S Pages: 04DM05-04DM05

    • DOI

      10.7567/jjap.54.04dm05

    • NAID

      210000145077

    • Related Report
      2014 Annual Research Report
    • Peer Reviewed / Open Access / Acknowledgement Compliant
  • [Journal Article] Platinum thickness dependence and annealing effect of the spin-Seebeck voltage in platinum/yttrium ion garnet structures2014

    • Author(s)
      Y. Saiga, K. Mizunuma, Y. Kono, J.-C. Ryu, H. Ono, M. Kohda, and E. Okuno
    • Journal Title

      Applied Physics Express

      Volume: 7 Issue: 9 Pages: 093001-093001

    • DOI

      10.7567/apex.7.093001

    • Related Report
      2014 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] 2.Direct determination of spin-orbit interaction coefficients and realization of the persistent spin helix symmetry2014

    • Author(s)
      A. Sasaki, S. Nonaka, Y. Kunihashi, M. Kohda, T. Bauernfeind, T. Dollinger, K. Richter, and J. Nitta
    • Journal Title

      Nature Nanotechnology

      Volume: 13 Issue: 9 Pages: 703-709

    • DOI

      10.1038/nnano.2014.128

    • Related Report
      2014 Annual Research Report
    • Peer Reviewed / Open Access / Acknowledgement Compliant
  • [Journal Article] Giant enhancement of spin detection sensitivity in (Ga, Mn) As/GaAs Esaki diodes2014

    • Author(s)
      Junichi Shiogai, Mariusz Ciorga, Martin Utz, Dieter. Schuh, Makoto Kohda, Dominique Bougeard, Tsutomu Nojima, Junsaku Nitta and Dieter Weiss
    • Journal Title

      Phys. Rev. B

      Volume: 89 Issue: 8 Pages: 813071-813075

    • DOI

      10.1103/physrevb.89.081307

    • Related Report
      2014 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Platinum layer thickness dependence of spin-Hall induced effective field in Pt/Co/Pt structures2014

    • Author(s)
      T. Yang, M. Kohda, T. Seki, K. Takanashi, and J. Nitta
    • Journal Title

      Jpn. J. of Appl. Phys.

      Volume: 53 Issue: 4S Pages: 04EM06-04EM06

    • DOI

      10.7567/jjap.53.04em06

    • Related Report
      2013 Research-status Report
    • Peer Reviewed
  • [Journal Article] Voltage-Induced Coercivity Change in FePt/MgO Stacks with Different FePt Thicknesses2013

    • Author(s)
      Y. Kikuchi, T. Seki, M. Kohda, J. Nitta, and K. Takanashi
    • Journal Title

      Journal of Physics D

      Volume: 46 Issue: 28 Pages: 285002-285007

    • DOI

      10.1088/0022-3727/46/28/285002

    • Related Report
      2013 Research-status Report
    • Peer Reviewed
  • [Presentation] Thickness dependence of spin relaxation in thin Pt on GaAs2013

    • Author(s)
      J. C. Ryu, A. Sasaki, J. Shiogai, M. Kohda and J. Nitta
    • Organizer
      Electronic Materials Symposium (EMS)
    • Place of Presentation
      Shiga, Japan
    • Related Report
      2013 Research-status Report
  • [Presentation] Thickness dependence of spin relaxation in MgO / Pt / GaAs layers2013

    • Author(s)
      J. C. Ryu, A. Sasaki, J. Shiogai, M. Kohda and J. Nitta
    • Organizer
      Solid State Devices and Materials (SSDM)
    • Place of Presentation
      Fukuoka, Japan
    • Related Report
      2013 Research-status Report
  • [Presentation] Perpendicular magnetic anisotropy in Pt/Co/AlO trilayer structures depending on AlO thickness and fabrication method.2013

    • Author(s)
      T. Yang, Z.Q. Wang, M. Kohda, T. Seki, K. Takanashi, and J. Nitta
    • Organizer
      Solid State Devices and Materials
    • Place of Presentation
      Fukuoka, Japan
    • Related Report
      2013 Research-status Report
  • [Remarks]

    • URL

      http://www.material.tohoku.ac.jp/~kotaib/top.html

    • Related Report
      2014 Annual Research Report
  • [Remarks] 好田個人ページ

    • URL

      http://www.material.tohoku.ac.jp/~kotaib/kohda.html

    • Related Report
      2013 Research-status Report

URL: 

Published: 2014-07-25   Modified: 2019-07-29  

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