Ferroelectricity generated by spin-orbit and spin-lattice couplings in multiferroic DyMnO3

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	Ferroelectricity generated by spin-orbit and spin-lattice couplings in multiferroic DyMnO3
	N. Zhang; S. Dong; J. M. Liu
	2012
发表期刊	Frontiers of Physics
ISSN	2095-0462
卷号	7 期号:4 页码:408-417
摘要	While the ferroelectricity in type-II multiferroic rare-earth manganites is believed to be generated by the inverse Dzyaloshinskii-Moriya (DM) interaction (spin-orbit coupling) associated with the Mn spiral spin order, recent results revealed the strong spin-lattice coupling arising from the Dy-Mn spin interaction in DyMnO3, which may also be an ingredient contributing to the ferroelectricity. In this work, we summarize our recent experiments on this issue by performing a series of rare-earth site nonmagnetic Y and magnetic Ho substitutions at Dy site for DyMnO3. It is demonstrated that the Dy-Mn spin interaction contributes to the ferroelectric polarization through the symmetric exchange striction mechanism (spin-lattice coupling). A coexistence of the spin-orbit coupling and spin-lattice coupling in one compound is confirmed. At the same time, the independent Dy antiferromagnetic spin order at low temperature can be effectively suppressed by the substitutions, beneficial to the polarization enhancement.
部门归属	[zhang, na; liu, jun-ming] nanjing univ, solid state microstruct lab, nanjing 210093, jiangsu, peoples r china. [zhang, na] henan normal univ, dept phys, xinxiang 453007, peoples r china. [dong, shuai] southeast univ, dept phys, nanjing 211189, jiangsu, peoples r china. [liu, jun-ming] s china normal univ, inst adv mat, guangzhou 510631, guangdong, peoples r china. [liu, jun-ming] chinese acad sci, int ctr mat phys, shenyang 110016, peoples r china.;zhang, n (reprint author), nanjing univ, solid state microstruct lab, nanjing 210093, jiangsu, peoples r china.;liujm@nju.edu.cn
关键词	Multiferroics Spin-orbit Coupling Spin-lattice Coupling Coexistence Perovskite Homno3 Phase
URL	查看原文
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/60447
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	N. Zhang,S. Dong,J. M. Liu. Ferroelectricity generated by spin-orbit and spin-lattice couplings in multiferroic DyMnO3[J]. Frontiers of Physics,2012,7(4):408-417.
APA	N. Zhang,S. Dong,&J. M. Liu.(2012).Ferroelectricity generated by spin-orbit and spin-lattice couplings in multiferroic DyMnO3.Frontiers of Physics,7(4),408-417.
MLA	N. Zhang,et al."Ferroelectricity generated by spin-orbit and spin-lattice couplings in multiferroic DyMnO3".Frontiers of Physics 7.4(2012):408-417.