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2013 Fiscal Year Final Research Report

Novel magnetoelectric effect and electromagnon

Research Project

  • PDF
Project/Area Number 24740224
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeMulti-year Fund
Research Field Condensed matter physics II
Research InstitutionThe University of Tokyo

Principal Investigator

SODA Minoru  東京大学, 物性研究所, 助教 (40463905)

Project Period (FY) 2012-04-01 – 2014-03-31
Keywordsマルチフェロイック / リラクサー磁性体 / スピン・ネマティック / 超常磁性 / 電気磁気効果
Research Abstract

Spin nematic interaction has been found in an easy-plane type antiferromagnet Ba2CoGe2O7 by measuring the magnetic anisotropy and spin dynamics. In this system, the spin nematic operator is equivalent to the polarization. The in-plane anisotropy is induced by an antiferro-type interaction of the spin nematic operator.
In our elastic neutron study of relaxor magnet LuFeCoO4, the strong coupling between the nuclear and magnetic correlations has been found. The observed magnetization with superparamagnetic component can be explained by ``multiferroic nano region'' (MNR) model; the polar nano-regions (PNRs) and superparamagnetic domains grow simultaneously.
These results show the possibility of new type of magnetoelectric effect.

  • Research Products

    (6 results)

All 2014 2013

All Journal Article (2 results) (of which Peer Reviewed: 2 results) Presentation (4 results)

  • [Journal Article] Spin-Nematic Interaction in the Multiferroic Compound Ba2CoGe2O72014

    • Author(s)
      M. Soda, M. Matsumoto, M. Månsson, S. Ohira-Kawamura, K. Nakajima, R. Shiina, and T. Masuda
    • Journal Title

      Phys. Rev. Lett.

      Volume: 112 Pages: 127205

    • DOI

      10.1103/PhysRevLett.112.127205

    • Peer Reviewed
  • [Journal Article] Quantum - Phase - Transition - Induced Multiferroics and Higgs Mode in Integer Spin Systems in Noncentrosymmetric Lattice with Strong Single-Ion Anisotropy2013

    • Author(s)
      M. Matsumoto, M. Soda, and T. Masuda
    • Journal Title

      J. Phys. Soc. Jpn.

      Volume: 82 Pages: 093703

    • DOI

      10.7566/JPSJ.82.093703

    • Peer Reviewed
  • [Presentation] マルチフェロイック物質Ba_IICoGe_2O_7における磁気モーメントの電場制御2014

    • Author(s)
      左右田稔,林田翔平,Bertrand Roessli,Martin Mansson,Jonathan White,松本正茂,椎名亮輔,益田隆嗣
    • Organizer
      日本物理学会
    • Place of Presentation
      東海大学
    • Year and Date
      2014-03-29
  • [Presentation] Neutron Scattering Study of Magnetic Excitations in Multiferroics Ba2CoGe2O72013

    • Author(s)
      M. Soda, M. Matsumoto, S. Gvasaliya, M. Mansson, A. Zheludev, S. Kawamura, K. Nakajima, and T. Masuda
    • Organizer
      The international conference on strong correlated electron systems (SCES 2013)
    • Place of Presentation
      Ito International Research Center Conference, The University of Tokyo, Japan
    • Year and Date
      20130805-08
  • [Presentation] LuFeCoO4におけるナノ磁性とリラクサー的誘電性の関係2013

    • Author(s)
      左右田稔,益田隆嗣
    • Organizer
      日本物理学会
    • Place of Presentation
      横浜国立大学
    • Year and Date
      2013-03-27
  • [Presentation] Neutron Scattering in Multiferroics Ba_IICoGe_2O_72013

    • Author(s)
      M. Soda, T. Masuda, M. Matsumoto, S. Gvasaliya, M. Mansson, A. Zheludev
    • Organizer
      APS
    • Place of Presentation
      Baltimore, USA
    • Year and Date
      2013-03-19

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Published: 2015-06-25  

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