Monte Carlo simulation on rotation of ferroelectric polarization by rotating magnetic field in conical-spin–ordered multiferroicsXiaoyan Yao1 and Qichang Li2
1 Department of Physics, Southeast University - Nanjing 211189, China
2 School of Physical Science, Qingdao University - Qingdao 266071, China
received 16 August 2009; accepted in final form 26 October 2009; published November 2009
published online 24 November 2009
To understand the rotation phenomenon of ferroelectric polarization () controlled by a magnetic field (), which is currently of great interest in experiments, the variation of the magnetic and ferroelectric behaviors under rotating are investigated by Monte Carlo simulation on a three-dimensional spinel lattice with classical Heisenberg spins. The anisotropic behaviors are observed for the different paths in which rotates. Especially when rotates in the plane normal to the magnetic modulation vector, can be driven by to rotate continuously without any noticeable decay. The detailed analysis of the spin structure indicates that the conical spin order is always retained very well during the process of rotation, and the continuous rotation of is realized by rotating the magnetization (), and then rotating the conical spin structure.
75.80.+q - Magnetomechanical and magnetoelectric effects, magnetostriction.
75.30.Gw - Magnetic anisotropy.
75.50.Gg - Ferrimagnetics.
© EPLA 2009