Anomalous Hall effect in perovskite cobalt oxide thin films

ORAL

Abstract

Magnetic oxide thin films have attracted increasing attention as the spintronic materials such as for magnetic tunnel junctions or for spin injection. SrCoO3 is one of the unique ferromagnetic perovskite oxides in its high Curie temperature (Bulk: 305 K) and tunable magnetic properties through topotactic oxygen deinsertion or La substitution. Despite these intriguing characteristics, the basic magneto-transport properties have remained to be clarified in this material. Here, we investigate anomalous Hall effect (AHE) in epitaxially grown SrCoO3 single crystalline thin films and La-doped ones. Their temperature dependences of AHE are examined as well as those of magnetization. We observe the characteristic behavior of intrinsic AHE as demonstrated in SrRuO3; the sign of AHE is inverted depending on magnetization and/or La substitution. The result suggests that AHE in SrCoO3 is subject to the berry phase in momentum space determined by the band structure, leading to a candidate for detecting other spin-orbit related phenomena.

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Presenters

  • Yuki Ohuchi

    Department of Applied Physics and Quantum-Phase Electronics Center (QPEC), the University of Tokyo

Authors

  • Yuki Ohuchi

    Department of Applied Physics and Quantum-Phase Electronics Center (QPEC), the University of Tokyo

  • Jobu Matsuno

    Center for Emergent Matter Science (CEMS), RIKEN

  • Yusuke Kozuka

    Department of Applied Physics and Quantum-Phase Electronics Center (QPEC), University of Tokyo, Department of Applied Physics and Quantum-Phase Electronics Center (QPEC), the University of Tokyo, Department of Applied Physics and Quantum-Phase Electronics Center (QPEC), Univ. of Tokyo, Applied Physics, University of Tokyo

  • Masaki Uchida

    Department of Applied Physics and Quantum-Phase Electronics Center (QPEC), the University of Tokyo, Department of Applied Physics and Quantum-Phase Electronics Center (QPEC), Univ. of Tokyo

  • Masashi Kawasaki

    Department of Applied Physics and Quantum-Phase Electronics Center (QPEC), University of Tokyo, Department of Applied Physics and Quantum-Phase Electronics Center (QPEC), the University of Tokyo, Univ of Tokyo, The University of Tokyo, Department of Applied Physics and Quantum Phase Electronics Center, University of Tokyo, Department of Applied Physics and Quantum-Phase Electronics Center (QPEC), Univ. of Tokyo, Applied Physics, University of Tokyo, Department of Applied Physics, The University of Tokyo, Department of Applied Physics, University of Tokyo