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