Anisotropic Spin Distribution and Perpendicular Magnetic Anisotropy in a Layered Ferromagnetic Semiconductor (Ba,K)(Zn,Mn)<sub>2</sub>As<sub>2</sub>

DOI DOI Web Site Web Site 被引用文献4件 参考文献43件 オープンアクセス
  • Shoya Sakamoto
    Department of Physics, The University of Tokyo, Bunkyo-ku, Tokyo 113-0033, Japan
  • Guoqiang Zhao
    Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
  • Goro Shibata
    Department of Physics, The University of Tokyo, Bunkyo-ku, Tokyo 113-0033, Japan
  • Zheng Deng
    Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
  • Kan Zhao
    Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
  • Xiancheng Wang
    Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
  • Yosuke Nonaka
    Department of Physics, The University of Tokyo, Bunkyo-ku, Tokyo 113-0033, Japan
  • Keisuke Ikeda
    Department of Physics, The University of Tokyo, Bunkyo-ku, Tokyo 113-0033, Japan
  • Zhendong Chi
    Department of Physics, The University of Tokyo, Bunkyo-ku, Tokyo 113-0033, Japan
  • Yuxuan Wan
    Department of Physics, The University of Tokyo, Bunkyo-ku, Tokyo 113-0033, Japan
  • Masahiro Suzuki
    Department of Physics, The University of Tokyo, Bunkyo-ku, Tokyo 113-0033, Japan
  • Tsuneharu Koide
    Photon Factory, Institute of Materials Structure Science, High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305-0801, Japan
  • Arata Tanaka
    Department of Quantum Matter, Graduate School of Advanced Sciences of Matter (ADSM), Hiroshima University, Higashi-Hiroshima 739-8530, Japan
  • Sadamichi Maekawa
    RIKEN Center for Emergent Matter Science (CEMS), Wako, Saitama 351-0198, Japan
  • Yasutomo J. Uemura
    Department of Physics, Columbia University, New York, New York 10027, United States
  • Changqing Jin
    Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
  • Atsushi Fujimori
    Department of Physics, The University of Tokyo, Bunkyo-ku, Tokyo 113-0033, Japan

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説明

Perpendicular magnetic anisotropy of the new ferromagnetic semiconductor (Ba,K)(Zn,Mn)$_{2}$As$_{2}$ is studied by angle-dependent x-ray magnetic circular dichroism measurements. The large magnetic anisotropy with the anisotropy field of 0.85 T is deduced by fitting the Stoner-Wohlfarth model to the magnetic-field-angle dependence of the projected magnetic moment. Transverse XMCD spectra highlights the anisotropic distribution of Mn 3$d$ electrons, where the $d_{xz}$ and $d_{yz}$ orbitals are less populated than the $d_{xy}$ state because of the $D_{2d}$ splitting arising from the elongated MnAs$_{4}$ tetrahedra. It is suggested that the magnetic anisotropy originates from the degeneracy lifting of $p$-$d_{xz}$, $d_{yz}$ hybridized states at the Fermi level and resulting energy gain due to spin-orbit coupling when spins are aligned along the $z$ direction.

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