Enhancement of Perpendicular Exchange Bias by Introducing Twin Boundary in Pt/Co/α-Cr₂O₃/α-V₂O₃ Epitaxial Film

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  • Shiratsuchi Yu
    Department of Materials Science and Engineering, Graduate School of Engineering, Osaka University
  • Yoshida Saori
    Department of Materials Science and Engineering, Graduate School of Engineering, Osaka University
  • Onoue Satoshi
    Department of Materials Science and Engineering, Graduate School of Engineering, Osaka University
  • Mitsumata Chiharu
    National Institute for Materials Science
  • Inami Nobuhito
    Nagoya University Synchrotron Radiation Research Center
  • Ueno Tetsuro
    Quantum Beam Science Research Directorate, National Institutes for Quantum and Radiological Science and Technology
  • Ono Kanta
    Institute of Materials Structure Science, High Energy Accelerator Research Organization
  • Nakatani Ryoichi
    Department of Materials Science and Engineering, Graduate School of Engineering, Osaka University

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タイトル別名
  • Enhancement of Perpendicular Exchange Bias by Introducing Twin Boundary in Pt/Co/α-Cr<sub>2</sub>O<sub>3</sub>/α-V<sub>2</sub>O<sub>3</sub> Epitaxial Film

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抄録

<p>Perpendicular exchange anisotropy at the Co/α-Cr2O3 interface was investigated using the two types of films: the film with the single crystalline α-Cr2O3 and that with the twinned α-Cr2O3. Exchange anisotropy energy density JK of the film with the single crystalline α-Cr2O3 was ∼0.09 erg/cm2 whereas JK of the film with the twinned α-Cr2O3 was ∼0.43 erg/cm2, more than 4-times enhancement. We discussed the mechanism of the enhancement of JK based on the exchange coupling at the twin boundary and that the spin frustration at the twin boundary can be the origin of the enhancement of JK.</p>

収録刊行物

  • MATERIALS TRANSACTIONS

    MATERIALS TRANSACTIONS 60 (9), 2028-2032, 2019-09-01

    公益社団法人 日本金属学会

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