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