Inter-relationship among magnetization, polarization and magnetic wave vector in multiferroic spinel CoCr$_{2}$O$_{4}$

ORAL

Abstract

It has been known that the spinel CoCr$_{2}$O$_{4}$ is a multiferroic with conical spiral magnetic order characterized by three physical parameters: magnetization (\textbf{M}), polarization (\textbf{P}) and magnetic modulation vector (\textbf{Q}). We have found that these observables have a close inter-relationship in the multiferroic state and their inter-relationship changes in a methodical manner upon temperature variation and through applied magnetic fields. In order to understand the origin of this inter-relationship, we have performed comprehensive characterization experiments on the multiferroic compound, including measurements of dielectric constant, polarization, specific heat, magnetic susceptibility, and resonant x-ray scattering as functions of temperature and applied magnetic field.

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Authors

  • Y.J. Choi

    • Rutgers Center for Emergent Materials and Department of Physics \& Astronomy, Rutgers University, Piscataway, New Jersey 08854, USA

  • Jun Okamoto

  • Di-Jing Huang

  • Kuo Sheng Chao

  • Hong-Ji Lin

  • Chien-Te Chen

  • Michel van Veenendaal

  • Thomas A. kaplan

  • S.-W. Cheong

    • Rutgers University
    • RCEM and Rutgers University, Piscataway, NJ
    • Rutgers University (Deparment of Physics)
    • Rutgers Univ.
    • Department of Physics and Astronomy, Rutgers University
    • Department of Physics and Astronomy, Rutgers University, Piscataway, New Jersey 08854, USA
    • Rutgers Center for Emergent Materials and Department of Physics \& Astronomy, Rutgers University, Piscataway, New Jersey 08854, USA
    • Rutgers Center for Emergent Materials and Department of Physics \& Astronomy, Rutgers University, Piscataway, New Jersey 08854