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Title: Magnetoelectric coupling induced by exchange striction in frustrated Ising spin chain : Monte Carlo simulation
Authors: Yao, Xiaoyan
Lo, Veng-cheong
Liu, Jun-Ming
Subjects: Calcium compounds
Cobalt compounds
Crystal microstructure
Exchange interactions (electron)
Ising model
Magnetoelectric effects
Monte Carlo methods
Spin dynamics
Issue Date: 1-Feb-2009
Publisher: American Institute of Physics
Source: Journal of applied physics, 1 Feb. 2009, v. 105, no. 3, 033907, p. 1-6.
Abstract: The fascinating magnetoelectric behavior as observed in Ca₃CoMnO₆ compound [Choi et al., Phys. Rev. Lett. 100, 047601 (2008)] is investigated by using Monte Carlo simulation based on a one-dimensional elastic Ising model. The macroscopic polarization results from the ionic displacements attributed to the exchange striction in an up-up-down-down (↑↑↓↓) spin ordering. In this scenario, the microscopic structures of spin and ionic displacement are investigated at different temperatures under different external electric fields to illuminate in detail the microscopic mechanism of the strong coupling between the magnetism and the ferroelectricity. It is revealed that the change in spin configuration dependent on temperature induces the freezing and melting phenomena of the polarized domains and thus the complicated temperature-dependent ferroelectric behavior in the whole low temperature range, namely the decline of the macroscopic polarization and the broad peak of dielectric constant. On the other hand, an external electric field also has influence on the magnetic structure through affecting the ionic displacements.
Rights: © 2009 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in X. Yao, V.C. Lo & J.M. Liu, J. Appl. Phys. 105, 033907 (2009) and may be found at
Type: Journal/Magazine Article
DOI: 10.1063/1.3077261
ISSN: 0021-8979 (print)
1089-7550 (online)
Appears in Collections:AP Journal/Magazine Articles

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