An analysis of the symmetry evolution and domain structure in RbFe(MoO<sub>4</sub>)<sub>2</sub> near its ferroaxial phase transition

ORAL

Abstract

The physics of frustrated magnets can be modeled as a two-dimensional triangle lattice antiferromagnet (2D TLA). One of the first such 2D TLA candidates discovered was RbFe(MoO4)2. Interest in this material has recently been renewed due to the discovery of ferroelectricity in the vicinity of antiferromagnetism (AFM) around 3.8K, which leads to a multiferroic state. The magnetic structure of RbFe(MoO4)2 has a structural phase transition at temperature TC≈190K which leads to a ferroaxial magnetic structure, but the nature of this ferroaxial phase transition and its domain distribution are not yet know. This is important because current understanding of the ferroelectricity in RbFe(MoO4)2 depends on the AFM order hosted on the ferroaxial crystal lattice. In this talk, I present an analysis using an ultrafast rotation anisotropy and second harmonic generation (RA-SHG) experiment to investigate the symmetry evolution around TC and wide-field SHG imaging to resolve the domain distribution of the ferroaxial structure order.

–

Presenters

  • Elizabeth Drueke

    • Univ of Michigan - Ann Arbor

Authors

  • Wencan Jin

    • University of Michigan
    • Physics Department, Univ of Michigan - Ann Arbor
    • Univ of Michigan - Ann Arbor

  • Elizabeth Drueke

    • Univ of Michigan - Ann Arbor

  • Kara Mattioli

    • Univ of Michigan - Ann Arbor

  • Siwen Li

    • Physics Department, Univ of Michigan - Ann Arbor
    • Univ of Michigan - Ann Arbor

  • Alemayehu Admasu

    • Department of Physics & Astronomy , Rutgers University
    • Rutgers University

  • Jae Wook Kim

    • Physics and Astronomy, Rutgers Center for Emergent Materials
    • Rutgers University

  • Yazhong Wang

    • Rutgers University

  • Sang-Wook Cheong

    • Rutgers University
    • Department of Physics and Astronomy, Rutgers University
    • Department of Physics and Astronomy, Rutgers, The State University of New Jersey
    • Physics, Rutgers University
    • Physics and Astronomy, Rutgers University
    • Rutgers Center for Emergent Materials and Department of Physics and Astronomy, Rutgers University
    • Physics and Astronomy, Rutgers Univ.
    • Rutgers Univ
    • Physics, Rutgers Univesity
    • Department of Physics, Rutgers University
    • Physics and Astronomy, Rutgers Center for Emergent Materials
    • Department of Physics & Astronomy , Rutgers University

  • Liuyan Zhao

    • University of Michigan
    • Physics Department, Univ of Michigan - Ann Arbor
    • Univ of Michigan - Ann Arbor
    • Department of Physics, University of Michigan