Electric Control of Spin Helicity in Multiferroic Triangular Lattice Antiferromagnet CuCrO<SUB>2</SUB> with Proper-Screw Order

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Author(s)

    • Soda Minoru
    • Department of Earth and Space Science, Graduate School of Science, Osaka University
    • Kimura Kenta
    • Division of Material Physics, Graduate School of Engineering Science, Osaka University
    • Kimura Tsuyoshi
    • Division of Material Physics, Graduate School of Engineering Science, Osaka University
    • Matsuura Masato
    • Department of Earth and Space Science, Graduate School of Science, Osaka University
    • Hirota Kazuma
    • Department of Earth and Space Science, Graduate School of Science, Osaka University

Abstract

We have carried out a spin-polarized-neutron study on multiferroic CuCrO<SUB>2</SUB> to clarify the origin of the ferroelectricity. The neutron results demonstrate that an incommensurate proper-screw magnetic structure of CuCrO<SUB>2</SUB> induces electric polarization. Not only the magnetic structure but also the oxygen location contributes to the ferroelectricity of CuCrO<SUB>2</SUB>. The electric polarization of CuCrO<SUB>2</SUB> can be explained not by a conventional spin-current model but by a theoretical prediction proposed by Arima. The spin helicities of CuCrO<SUB>2</SUB> can be reversed by the reversal of the electric field <I>E</I> in the multiferroic phase.

Journal

  • Journal of the Physical Society of Japan

    Journal of the Physical Society of Japan 78(12), 124703-124703, 2009

    THE PHYSICAL SOCIETY OF JAPAN

Codes

  • NII Article ID (NAID)
    130005437233
  • Text Lang
    ENG
  • ISSN
    0031-9015
  • Data Source
    J-STAGE 
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