Non-Reciprocal Directional Dichroism of THz Radiation in LiCoPO<sub>4</sub>: 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.

*Part of the work was supported by The Estonian Ministry of Education and Research under Grant No. IUT23-03, and the European Regional Development Fund project TK134.

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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