Coexistence of two cycloid-phases in multiferroic RMnO3: Consequence of the next-nearest-neighbor spin interaction modulations

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	Coexistence of two cycloid-phases in multiferroic RMnO3: Consequence of the next-nearest-neighbor spin interaction modulations
	Y. M. Tao; D. P. Chen; M. H. Qin; S. Dong; X. S. Gao; J. M. Liu
	2012
发表期刊	Journal of Applied Physics
ISSN	0021-8979
卷号	111 期号:8
摘要	The modulation of the next-nearest-neighbor spin interaction in RMnO3-type manganites is considered and its effect on the multiferroic behaviors is investigated within the framework of classical Heisenberg model using Monte Carlo simulation. Two types of the modulations, i.e., the symmetric perturbations in which the interactions over the lattice are symmetrically modulated with an equal distribution to maintain the mean interaction invariant and the asymmetric perturbations in which the interactions over the lattice are randomly modulated with variable mean interaction, are taken into account. It is shown that both the types of modulations can drive the reorientation of the spiral spin order and thus lead to the coexistence of two cycloid-phases within appropriate magnitudes of modulation. The two multiferroic phase coexistence can be understood as the consequence of the competition between the single-ion anisotropy and the Dzyaloshinskii-Mariya interaction. A comparison of the simulated results with recent relevant experiments on multiferroic manganites is also presented. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4707756]
部门归属	[tao, y. m.; chen, d. p.; liu, j. -m.] nanjing univ, solid state microstruct lab, nanjing 210093, jiangsu, peoples r china. [qin, m. h.; gao, x. s.; liu, j. -m.] s china normal univ, adv mat lab, sch phys, guangzhou 510006, guangdong, peoples r china. [dong, s.] southeast univ, dept phys, nanjing 211189, jiangsu, peoples r china. [liu, j. -m.] chinese acad sci, int ctr mat phys, shenyang, peoples r china.;tao, ym (reprint author), nanjing univ, solid state microstruct lab, nanjing 210093, jiangsu, peoples r china.
关键词	Neutron-diffraction Perovskites r Polarization Pr Ho Sm Dy Nd
URL	查看原文
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/60261
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	Y. M. Tao,D. P. Chen,M. H. Qin,et al. Coexistence of two cycloid-phases in multiferroic RMnO3: Consequence of the next-nearest-neighbor spin interaction modulations[J]. Journal of Applied Physics,2012,111(8).
APA	Y. M. Tao,D. P. Chen,M. H. Qin,S. Dong,X. S. Gao,&J. M. Liu.(2012).Coexistence of two cycloid-phases in multiferroic RMnO3: Consequence of the next-nearest-neighbor spin interaction modulations.Journal of Applied Physics,111(8).
MLA	Y. M. Tao,et al."Coexistence of two cycloid-phases in multiferroic RMnO3: Consequence of the next-nearest-neighbor spin interaction modulations".Journal of Applied Physics 111.8(2012).