Issue
EPL
Volume 88, Number 4, November 2009
Article Number 47002
Number of page(s) 6
Section Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties
DOI http://dx.doi.org/10.1209/0295-5075/88/47002
Published online 24 November 2009
EPL, 88 (2009) 47002
DOI: 10.1209/0295-5075/88/47002

Monte Carlo simulation on rotation of ferroelectric polarization by rotating magnetic field in conical-spin–ordered multiferroics

Xiaoyan Yao1 and Qichang Li2

1   Department of Physics, Southeast University - Nanjing 211189, China
2   School of Physical Science, Qingdao University - Qingdao 266071, China

yaoxiaoyan@gmail.com

received 16 August 2009; accepted in final form 26 October 2009; published November 2009
published online 24 November 2009

Abstract
To understand the rotation phenomenon of ferroelectric polarization ($\vect{ P}$) controlled by a magnetic field ($\vect{ h}$), which is currently of great interest in experiments, the variation of the magnetic and ferroelectric behaviors under rotating $\vect{ h}$ 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 $\vect{ h}$ rotates. Especially when $\vect{ h}$ rotates in the plane normal to the magnetic modulation vector, $\vect{ P}$ can be driven by $\vect{ h}$ 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 $\vect{ h}$ rotation, and the continuous rotation of $\vect{ P}$ is realized by $\vect{ h}$ rotating the magnetization ($\vect{ M}$), and then rotating the conical spin structure.

PACS
75.80.+q - Magnetomechanical and magnetoelectric effects, magnetostriction.
75.30.Gw - Magnetic anisotropy.
75.50.Gg - Ferrimagnetics.

© EPLA 2009