Room-temperature perpendicular magnetic anisotropy of Pt/Co/AlO<i>x</i> trilayers on SrTiO3 (001)

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  • Ye Du
    Department of Materials Science, Tohoku University 1 , Sendai 980-8579, Japan
  • Shoma Arai
    Department of Electrical Engineering and Information Systems, The University of Tokyo 3 , Bunkyo, Tokyo 113-8656, Japan
  • Shingo Kaneta-Takada
    Department of Electrical Engineering and Information Systems, The University of Tokyo 3 , Bunkyo, Tokyo 113-8656, Japan
  • Le Duc Anh
    Department of Electrical Engineering and Information Systems, The University of Tokyo 3 , Bunkyo, Tokyo 113-8656, Japan
  • Shutaro Karube
    Department of Materials Science, Tohoku University 1 , Sendai 980-8579, Japan
  • Makoto Kohda
    Department of Materials Science, Tohoku University 1 , Sendai 980-8579, Japan
  • Shinobu Ohya
    Department of Electrical Engineering and Information Systems, The University of Tokyo 3 , Bunkyo, Tokyo 113-8656, Japan
  • Junsaku Nitta
    Department of Materials Science, Tohoku University 1 , Sendai 980-8579, Japan

説明

<jats:p>We demonstrate room-temperature perpendicular magnetic anisotropy (PMA) in Pt/Co/AlOx trilayers sputter-deposited onto a SrTiO3 (STO) (001) substrate. Reflection high-energy electron diffraction and x-ray diffraction results confirm the two-dimensional polycrystalline nature for both Pt and Co layers in PMA films, which are (111) oriented in the out-of-plane direction. While the PMA in Pt/Co/AlOx trilayers on STO (001) is found to have interfacial origins, sizable PMA is maintained when Pt layer thickness is as thin as 1 nm, which is several times to one order of magnitude smaller than the reported values of the spin diffusion length for Pt, thus facilitating spin transmission along the thin-film-normal direction. With the STO (001) substrate serving as the fundamental building block for realizing giant Rashba spin splitting, this work provides a feasible platform for the investigation of magnetization switching in two-dimensional-electron-gas-based magnetic hetero-structures at room temperature.</jats:p>

収録刊行物

  • AIP Advances

    AIP Advances 10 (10), 2020-10-01

    AIP Publishing

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