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Title: Dielectric and phonon properties of the multiferroic ferrimagnet Cu{sub 2}OSeO{sub 3}

We propose a microscopic model in order to study the multiferroic properties of Cu{sub 2}OSeO{sub 3} taking into account the ferrimagnetic interaction, frustration, linear magnetoelectric (ME) coupling, and anharmonic spin-phonon interaction. We have shown that the dielectric constant and the phonon energy and damping have a kink near the magnetic phase transition T{sub C} = 58 K which disappears with increasing of an external magnetic field. This behavior is an evidence for a strong ME coupling and in qualitative agreement with the experimental data.
Authors:
 [1]
  1. University of Forestry, Faculty of Forest Industry, Kl. Ohridsky Blvd. 10, 1756 Sofia (Bulgaria)
Publication Date:
OSTI Identifier:
22278079
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 115; Journal Issue: 6; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; COPPER OXIDES; COUPLING; DAMPING; DIELECTRIC MATERIALS; FERRIMAGNETIC MATERIALS; FERRIMAGNETISM; MAGNETIC FIELDS; MAGNETIC PROPERTIES; PERMITTIVITY; PHASE TRANSFORMATIONS; PHONONS; SELENIUM OXIDES; SPIN