Magnetic Phase Diagram of the Giant Magnetoelectric, DyMn2O5

ORAL

Abstract

It has been recently found that DyMn$_{2}$O$_{5}$ develops a spontaneous electric polarization below the Neel ordering temperature. Furthermore, this spontaneous polarization can be switched through the application of a magnetic field. ~Several anomalies were also observed in the dielectric constant. ~We have performed neutron diffraction measurements on a single crystal of this material, and have found that anomalies in the dielectric constant and the polarization are correlated with magnetic transitions induced by field or temperature. ~During this talk, I will present the magnetic phase diagram of this system and show how it corresponds to the spontaneous polarization and anomalies in the dielectric constant.

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Authors

  • W. Ratcliff II

    • NIST

  • Valery Kiryukhin

    • Rutgers University

  • M.A. Kenzelmann

    • John Hopkins University

  • Seung-Hun Lee

    • NIST
    • NIST Center for Neutron Research

  • Ross Erwin

    • NIST

  • Namjung Hur

    • Dept. of Physics and Astronomy, Rutgers University, Piscataway, New Jersey

  • S. Park

  • S-W. Cheong

    • Rutgers University
    • Department of Physics and Astronomy, Rutgers University
    • Rutgers University, Piscataway, NJ