%0 Journal Article
%T Magnetism driven ferroelectricity above liquid nitrogen temperature in Y2CoMnO6
%A G. Sharma
%A J. Saha
%A S. Patnaik
%J Physics
%D 2013
%I arXiv
%R 10.1063/1.4812728
%X We report multiferroic behavior in double perovskite Y2CoMnO6 with ferroelectric transition temperature Tc = 80K. The origin of ferroelectricity is associated with magnetic ordering of Co2+ and Mn4+ moments in a up-up-down-down arrangement. The saturation polarization and magnetization are estimated to be 65 uC/m2 and 6.2 Bohr magneton/f.u. respectively. The magnetoelectric coupling parameter, on the other hand, is small as a 5 Tesla field suppresses the electric polarization by only ~8%. This is corroborated with observed hysteretic behaviour at 5K that remains unsaturated even upto 7 Tesla. A model based on exchange-striction is proposed to explain the observed high temperature ferroelectricity.
%U http://arxiv.org/abs/1303.6921v1