Non-Reciprocal Directional Dichroism of THz Radiation in LiCoPO4: Read-out of Magnetoelectric Domains

ORAL

Abstract

Magnetoelectric (ME) effect in multiferroic materials is the cornerstone of new electronic devices allowing the electric field control of magnetization. Here we demonstrate the optical read-out of magnetoelectric domains in LiCoPO4 exploiting the absorption difference between ME domains [Kocsis et al., PRL121, 057601 (2018)]. Domains absorb differently because of non-reciprocal directional dichroism of spin wave resonances coupled to electric polarization. Single ME domain can be selected by poling with crossed electric and magnetic fields from the magnetically disordered state.
LiCoPO4 is the realization of a ME memory effect in an insulator with coupled anti-ferroelectric and anti-ferromagnetic orders.

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Presenters

  • Toomas Room

    National Institute of Chemical Physics and Biophysics, National Institute of Chemical Physics and Biophysics, Tallinn, Estonia

Authors

  • Toomas Room

    National Institute of Chemical Physics and Biophysics, National Institute of Chemical Physics and Biophysics, Tallinn, Estonia

  • Urmas Nagel

    National Institute of Chemical Physics and Biophysics, National Institute of Chemical Physics and Biophysics, Tallinn, Estonia

  • Sandor Bordacs

    Department of Physics, Budapest University of Technology and Economics and MTA-BME, Department of Physics, Budapest University of Technology and Economics and MTA-BME, Budapest, Hungary

  • Jakub Vit

    Department of Physics, Budapest University of Technology and Economics and MTA-BME

  • Istvan Kezsmarki

    Experimental Physics 5, Center for Electronic Correlations and Magnetism, Institute of Physics, University of Augsburg, Germany, Experimental Physics V, Center for Electronic Correlations and Magnetism, Augsburg, Germany, Experimental Physics 5, Center for Electronic Correlations and Magnetism, Institute of Physics, University of Augsburg, Augsburg, Germany

  • Judit Romhanyi

    Okinawa Institute of Science and Technology, Okinawa, Japan

  • Karlo Penc

    Hungarian Academy of Sciences, Institute for Solid State Physics and Optics, Wigner Research Centre for Physics, Hungarian Academy of Sciences, Budapest, Hungary, Department of Physics, Budapest University of Technology and Economics and MTA-BME, Budapest, Hungary

  • Vilmos Kocsis

    RIKEN Center for Emergent Matter Science (CEMS), Wako, Japan, Center for Emergent Matter Science (CEMS), RIKEN

  • Yusuke Tokunaga

    RIKEN Center for Emergent Matter Science (CEMS), Wako, Japan, University of Tokyo

  • Yasujiro Taguchi

    RIKEN Center for Emergent Matter Science (CEMS), RIKEN Center for Emergent Matter Science, RIKEN Center for Emergent Matter Science (CEMS), Wako, Japan, Center for Emergent Matter Science (CEMS), RIKEN, RIKEN Center for Emergent Matter Science (CEMS), Wako, Japan.

  • Yoshinori Tokura

    RIKEN Center for Emergent Matter Science (CEMS), RIKEN Center for Emergent Matter Science, RIKEN CEMS, RIKEN Center for Emergent Matter Science (CEMS), Wako, Japan, Center for Emergent Matter Science (CEMS), RIKEN, Department of Applied Physics and Quantum-Phase Electronics Center, University of Tokyo, University of Tokyo, University of Tokyo and RIKEN CEMS, CEMS, RIKEN, Center for Emergent Matter Science, RIKEN, Department of Applied Physics, University of Tokyo, University of Tokyo and RIKEN-CEMS