Magnetic field-temperature phase diagram of the molecule-based multiferroic (NH4)2FeCl5H2O

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