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Investigation of magnetization dynamics in exchange-biased Antiferromagnetic/Ferromagnetic/Non-magnetic (AFM/FM/NM) systems with perpendicular magnetic anisotropy

Research Project

Project/Area Number 19K23583
Research Category

Grant-in-Aid for Research Activity Start-up

Allocation TypeMulti-year Fund
Review Section 0402:Nano/micro science, applied condensed matter physics, applied physics and engineering, and related fields
Research InstitutionTohoku University

Principal Investigator

NGUYEN THI VAN ANH  東北大学, 先端スピントロニクス研究開発センター, 助教 (20840101)

Project Period (FY) 2019-08-30 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Fiscal Year 2020: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2019: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Keywordsantiferromagnetic / magnetization dynamics / damping constant / exchange bias system / ferromagnetic resonance / PMA / spintronics / exchanged bias system / Cr2O3 / high frequency meas.
Outline of Research at the Start

This research focuses on an investigation of magnetization dynamics in exchange-biased systems by showing: (1) The magnetization dynamics under the influence of exchange bias field; and (2) Control the magnetization dynamics by changing the interfacial magnetization condition.

Outline of Final Research Achievements

The control of magnetization using a voltage has attracted much attention because it has opened the way to realize the ultra-low power spintronic devices. By using Cr2O3 thin film, we also could achieve the voltage-induced magnetization switching in an adjacent ferromagnetic (FM) layer, thanks to the exchange coupling between Cr2O3 and FM. Since the dynamic magnetic properties are closely related to magnetization switching, a deep understanding on these properties is necessitated.
We focused on the investigation of the dynamic magnetic properties of Pt/FM/Cr2O3 systems using the ferromagnetic resonance technique. The results showed that the dynamic magnetic properties depends on both of the FM layer thickness and Pt layer thickness. This means that the dynamic magnetic properties of the Pt/FM/Cr2O3 system are strongly determined by the FM layer, and these properties could be correlated by the perpendicular magnetic anisotropy and the exchange coupling in the FM/Cr2O3 system.

Academic Significance and Societal Importance of the Research Achievements

So far the investigation of dynamic magnetic properties in exchange-coupled Cr2O3/FM/NM systems was lack. The investigation here would set more light in the origin of the voltage-induced magnetization switching, and contribute to the realization of ultra-low power spintronic devices using Cr2O3.

Report

(4 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (8 results)

All 2022 2021 2020 2019

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

  • [Journal Article] Study on the dynamic magnetic properties in perpendicular magnetic anisotropy Pt/Co/Cr2O3/Pt stack films2021

    • Author(s)
      T. V. A. Nguyen, Y. Shiratsuchi, S. Ikeda, T. Endoh, Y. Endo
    • Journal Title

      電気学会研究会資料. MAG= The papers of technical meeting on magnetics, IEE Japan

      Volume: 2021-134 Pages: 29-33

    • Related Report
      2021 Annual Research Report
  • [Journal Article] Magnetic properties of Co film in Pt/Co/Cr2O3/Pt structure2020

    • Author(s)
      T. V. A. Nguyen, Y. Shiratsuchi, H. Sato, S. Ikeda, T. Endoh, Y. Endo
    • Journal Title

      AIP Advances

      Volume: 10 Issue: 1

    • DOI

      10.1063/1.5130439

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] Study on the dynamic magnetic properties in perpendicular magnetic anisotropy Pt/Co/Cr2O3/Pt stack films2022

    • Author(s)
      T. V. A. Nguyen, Y. Shiratsuchi, S. Ikeda, T. Endoh, Y. Endo
    • Organizer
      マグネティックス研究会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Study on the Gilbert damping constant in perpendicular magnetized Pt/Co/Cr2O3/Pt stacks2021

    • Author(s)
      T. V. A. Nguyen, Y. Shiratsuchi, H. Sato, S. Ikeda, T. Endoh, Y. Endo
    • Organizer
      応用物理学会 強的秩序とその操作に関わる研究会 第12回講演会
    • Related Report
      2020 Research-status Report
    • Invited
  • [Presentation] Modification of Gilbert damping constant at TaOx/CoFeB interface2020

    • Author(s)
      T. V. A. Nguyen, H. Sato, S. Fukami, Y. Saito, S. Hashi, S. Ikeda, T. Endoh, Y. Endo
    • Organizer
      The 3rd Symposium for The Core Research Clusters for Materials Science and Spintronics
    • Related Report
      2019 Research-status Report
  • [Presentation] Influence of Oxygen content on the Gilbert damping constant at TaOx/CoFeB interface2020

    • Author(s)
      T. V. A. Nguyen, H. Sato, S. Fukami, Y. Saito, S. Hashi, S. Ikeda, T. Endoh, Y. Endo
    • Organizer
      The 67th JSAP Spring Meeting
    • Related Report
      2019 Research-status Report
  • [Presentation] Temperature dependence of Gilbert damping constant in amorphous Co-Fe-B thin films2019

    • Author(s)
      T. V. A. Nguyen, H. Sato, S.Ikeda, T. Endoh, Y. Endo
    • Organizer
      The 81st JSAP Autumm Meeting
    • Related Report
      2019 Research-status Report
  • [Presentation] Dynamic magnetic property in Pt/Co/Cr2O3/Pt stack films with perpendicular magnetic anisotropy2019

    • Author(s)
      T. V. A. Nguyen, Y. Shiratsuchi, H. Sato, S. Ikeda, T. Endoh, Y. Endo
    • Organizer
      2019 Annual Conference on Magnetism and Magnetic Materials
    • Related Report
      2019 Research-status Report

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Published: 2019-09-03   Modified: 2023-01-30  

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