Control of domain wall patterning and anomalous response functions in ferrimagnetic spinels

ORAL

Abstract


The ferrimagnetic spinels Mn3O4 and MnV2O4 are known for their anomalous magnetoresponsive behaviors, including strong magnetoelastic and magnetodielectric couplings at low temperatures. At the same temperatures, crystals of these materials display a real-space separation of the volume into nanometer length-scale stripe domains, reminiscent of those in ferroelectrics. These stripe patterns demonstrate a remarkable sensitivity to environmental stress, and are controllable by applied fields. In this talk, we present new small angle neutron scattering and bulk data on single crystalline MnV2O4 which allow us to directly correlate anomalous inverse magnetoelastic and magnetocapacitance effects with the onset and field response of these mesoscale features. Neutron diffraction and small-angle X-ray scattering meanwhile reveal a strong intertwining of these effects with lattice degrees of freedom, collectively establishing strain as an important tuning parameter for anomalous behavior.

*Supported by the National Science Foundation, Award no. DMR-1455264-CAR, and by the U.S. Department of Energy, Office of Science, Office of Workforce Development for Teachers and Scientists, Office of Science Graduate Student Research (SCGSR) program.

–

Presenters

  • Lazar Kish

    • University of Illinois Urbana-Champagne
    • University of Illinois at Urbana-Champaign
    • Physics, University of Illinois at Urbana-Champaign

Authors

  • Lazar Kish

    • University of Illinois Urbana-Champagne
    • University of Illinois at Urbana-Champaign
    • Physics, University of Illinois at Urbana-Champaign

  • Alexander N. Thaler

    • Neutron Scattering Division, Oak Ridge National Laboratory

  • Minseong Lee

    • National High Magnetic Field Laboratory
    • Pulsed Field Facility, Los Alamos National Lab
    • National High Magnetic Field Laboratory, Los Alamos National Laboratory
    • Los Alamos National Lab
    • Los Alamos National Laboratory

  • Matthew Frith

    • Advanced Photon Source, Argonne National Laboratory

  • Brian Wolin

    • Physics, University of Illinois at Urbana-Champaign

  • Xu Wang

    • Physics, University of Illinois at Urbana-Champaign

  • Alexander Zakrzewski

    • Physics, University of Illinois at Urbana-Champaign

  • Matthias D Frontzek

    • Neutron Scattering Division, Oak Ridge National Laboratory

  • Ken Littrell

    • Neutron Scattering Division, Oak Ridge National Laboratory

  • Raffi Budakian

    • Physics, University of Illinois at Urbana-Champaign

  • Haidong Zhou

    • Dep. Physics and Astronomy, University of Tennessee, Knoxville TN
    • Department of Physics and Astronomy, University of Tennessee, Knoxville
    • University of Tenessee
    • University of Tennessee, Knoxville
    • Physics and Astronomy, University of Tennessee at Knoxville
    • University of Tennessee
    • Department of Physics and Astronomy, University of Tennessee

  • Vivien Zapf

    • Los Alamos Natl Lab
    • National High Magnetic Field Lab, Los Alamos National Lab
    • Pulsed Field Facility, Los Alamos National Lab
    • Los Alamos National Lab
    • Los Alamos National Laboratory

  • Adam Aczel

    • Oak Ridge National Laboratory
    • Quantum Condensed Matter Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA
    • Neutron Scattering Division, Oak Ridge National Laboratory
    • Oak Ridge National Lab

  • Lisa DeBeer-Schmitt

    • Oak Ridge National Laboratory
    • Neutron Scattering Directorate, Oak Ridge Natrional Laboratory
    • Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA
    • Neutron Scattering Division, Oak Ridge National Laboratory
    • Oak Ridge National Lab

  • Greg MacDougall

    • University of Illinois at Urbana-Champaign
    • Physics, University of Illinois at Urbana-Champaign