期刊
APPLIED PHYSICS LETTERS
卷 103, 期 1, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.4812728
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资金
- DST-FIST
- DST PURSE
- UGC
- CSIR, India
We report multiferroic behaviour in double perovskite Y2CoMnO6 with ferroelectric transition temperature T-c = 80 K. Both X-ray diffraction and neutron scattering data confirm a centrosymmetric crystal structure of space group P2(1)/n at room temperature. The saturation polarization and magnetization are estimated to be 65 mu C/m(2) and 6.2 mu(B)/f.u. respectively. The magnetoelectric coupling parameter, on the other hand, is small as a 5 T field suppresses the electric polarization by only similar to 8%. The origin of ferroelectricity is associated with magnetic ordering of Co2+ and Mn4+ moments in up arrow up arrow-down arrow down arrow arrangement. A model based on exchange-striction is proposed to explain the observed high temperature ferroelectricity. (C) 2013 AIP Publishing LLC.
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