Magnetically induced ferroelectricity in single crystalline ferrimagnet, Mn$_2$Mo$_3$O$_8$

ORAL

Abstract

We present magnetization and electric polarization results on multiferroic ferrimagnet molybdate system, Mn$_2$Mo$_3$O$_8$ in pulsed magnetic fields. Mn$_2$Mo$_3$O$_8$, also known as the mineral isiemite crystallizes in a hexagonal P6${_3}mc$ space group. The magnetism is attributed to the Mn ions whereas the Mo is diamagnetic. The Mo and Mn atoms are stacked alternately along \boldface{c}-axis. The Mn ions form a hexagonal lattice and occur in octahedral and tetragonal coordination. The spins on two different Mn sites give rise to ferrimagnetism. The system orders at about 42 K accompanied by a lambda like anomaly in heat capacity. Mn$_2$Mo$_3$O$_8$ shows anisotropic magnetization with a change in slope at 40 K signaling possibly an AFM to ferrimagnet ordering. We observe magnetic field induced electric polarization in our preliminary results and an anomaly at 40 K corresponding to T$_N$.

*A portion of this work was performed at the NHMFL, which is supported by National Science Foundation Cooperative Agreement No. DMR-1157490, the State of Florida, and the U.S. Department of Energy.

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Authors

  • Shalinee Chikara

    • National High Magnetic Field Lab, Los Alamos National Laboratory, Los Alamos, NM 87544, USA

  • John Singleton

    • National High Magnetic Field Laboratory, Los Alamos
    • Los Alamos National Laboratory
    • NHMFL/LANL
    • National High Magnetic Field Laboratory, Los Alamos National Lab (LANL)
    • National High Magnetic Field Lab, Los Alamos National Laboratory, Los Alamos, NM 87544, USA

  • Bin Gao

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

  • Yazhong Wang

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

  • Sang-Wook Cheong

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

  • Vivien Zapf

    • National High Magnetic Field Laboratory, Los Alamos National Lab (LANL)
    • National High Magnetic Field Lab, Los Alamos National Laboratory, Los Alamos, NM 87544, USA
    • NHMFL-LANL