Dielectric properties of multiferroic CuCrO2

  • Angel T. Apostolov
  • Illiana N. Apostolova
  • Steffen Trimper
  • Julia M. Wesselinowa
Regular Article

Abstract

We propose a microscopic model in order to study the multiferroic properties of the triangular compound CuCrO2 taking into account antiferromagnetic interactions in the ab plane, spin-phonon interactions and quadratic magnetoelectric (ME) coupling. The temperature and magnetic field dependence of the polarization Pab and dielectric constant ϵab is calculated. Pab increases when h is parallel to its direction and decreases when h is perpendicular to it. We show that ϵab has a kink near the magnetic phase transition TN = 24 K which disappears with increasing of an external magnetic field hab. This behavior is an evidence for a strong ME coupling and in qualitative agreement with the experimental data.

Keywords

Solid State and Materials 

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Copyright information

© EDP Sciences, SIF, Springer-Verlag GmbH Germany, part of Springer Nature 2017

Authors and Affiliations

  • Angel T. Apostolov
    • 1
  • Illiana N. Apostolova
    • 2
  • Steffen Trimper
    • 3
  • Julia M. Wesselinowa
    • 4
  1. 1.University of Architecture, Civil Engineering and Geodesy, Department of PhysicsSofiaBulgaria
  2. 2.University of Forestry, Faculty of Forest IndustrySofiaBulgaria
  3. 3.Martin-Luther-University, Institute of PhysicsHalleGermany
  4. 4.University of Sofia, Department of PhysicsSofiaBulgaria

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