Magnetic field-temperature phase diagram of the molecule-based multiferroic (NH<sub>4</sub>)<sub>2</sub>FeCl<sub>5</sub>H<sub>2</sub>O

ORAL

Abstract

The magnetization of a molecule-based multiferroic, (NH4)2FeCl5H2O and its deuterated analog, was measured using pulsed magnetic fields of up to 60 T and temperatures down to 0.6 K, to reveal the magnetic field-temperature phase diagram. Density functional theory and numerical simulations of the exchange interactions demonstrates the origin of non-collinearity and multiferrocity within the system. The phase diagram is different to other multiferroic materials with a cascade of transitions up to and including the 31 T transition to the fully polarized state. Together, this opens the door to further exploration of the high field phase using powered and pulsed magnets.

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Presenters

  • Amanda Clune

    • University of Tennessee

Authors

  • Amanda Clune

    • University of Tennessee

  • Jisoo Nam

    • Ulsan Natl Inst of Sci & Tech

  • Kendall Hughey

    • University of Tennessee

  • Minseong Lee

    • UNIST
    • Ulsan Natl Inst of Sci & Tech

  • Wei Tian

    • Oak Ridge National Laboratory

  • Jaime Fernandez-Baca

    • Neutron Sciences Directorate, Oak Ridge National Laboratory
    • Oak Ridge National Laboratory

  • Randy Fishman

    • Oak Ridge National Laboratory
    • Materials Science and Technology Division, Oak Ridge National Lab, Oak Ridge, Tennessee, USA

  • John Singleton

    • National High Magnetic Field Laboratory, Los Alamos National Laboratory
    • MPA-MAG, Los Alamos National Laboratory
    • National High Magnetic Field Laboratory, Los Alamos National Laboratory, Los Alamos, NM 87545
    • Los Alamos National Laboratory
    • NHMFL, Los Alamos National Labs
    • NHMFL, Los Alamos National Laboratory
    • Los Alamos, National High Magnetic Field Laboratory
    • NHMFL, Los Alamos Natl Lab
    • Los Alamos Natl Lab

  • Jun Hee Lee

    • Ulsan Natl Inst of Sci & Tech

  • Janice Lynn Musfeldt

    • Univ of Tennessee, Knoxville
    • Department of Physics and Astronomy, Department of Chemistry, University of Tennessee
    • University of Tennessee