Domain structure and magnetization reversal in multiferroic LuFe$_2$O$_4$

ORAL

Abstract

We report real space magnetic imaging of single crystal multiferroic LuFe$_2$O$_4$ via variable temperature magnetic force microscopy (VT-MFM). The magnetization reversal of LuFe$_2$O$_4$ is investigated in detail with MFM in magnetic fields up to 8 tesla at several temperatures below T$_N$=230 K. Our results suggest that the domain structure and the magnetization reversal of LuFe$_2$O$_4$ are different from those of conventional FM magnets with a uniaxial anisotropy. These unconventional behaviors may originate from the low dimentionality and the unusual spin-charge frustration of LuFe$_2$O$_4$.

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Authors

  • Weida Wu

  • S. Park

    • Rutgers Univ.
    • Department of Physics and Astronomy, Rutgers University, Piscataway, New Jersey 08854, USA

  • Chenglin Zhang

    • Rutgers University
    • Rutgers Center for Emergent Materials and Department of Physics \& Astronomy, Rutgers University, Piscataway, New Jersey 08854, USA

  • S.-W. Cheong

    • Rutgers University
    • RCEM and Rutgers University, Piscataway, NJ
    • Rutgers University (Deparment of Physics)
    • Rutgers Univ.
    • Department of Physics and Astronomy, Rutgers University
    • Department of Physics and Astronomy, Rutgers University, Piscataway, New Jersey 08854, USA
    • Rutgers Center for Emergent Materials and Department of Physics \& Astronomy, Rutgers University, Piscataway, New Jersey 08854, USA
    • Rutgers Center for Emergent Materials and Department of Physics \& Astronomy, Rutgers University, Piscataway, New Jersey 08854