Ferroelectricity driven by the noncentrosymmetric magnetic ordering in multiferroic TbMn(2)O(5): a first-principles study.
作者信息
Wang Chenjie, Guo Guang-Can, He Lixin
机构信息
Key Laboratory of Quantum Information, University of Science and Technology of China, Hefei, 230026, People's Republic of China.
出版信息
Phys Rev Lett. 2007 Oct 26;99(17):177202. doi: 10.1103/PhysRevLett.99.177202. Epub 2007 Oct 22.
Abstract
The ground state structural, electronic, and magnetic properties of multiferroic TbMn(2)O(5) are investigated via first-principles calculations. We show that the ferroelectricity in TbMn(2)O(5) is driven by the noncentrosymmetric magnetic ordering, without invoking the spin-orbit coupling and noncollinear spins. The intrinsic electric polarization in this compound is calculated to be 1187 nC cm(-2), an order of magnitude larger than previously thought.
摘要
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