Magnon energy gap in a three-layer ferromagnetic superlattice

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	Magnon energy gap in a three-layer ferromagnetic superlattice
	R. K. Qiu; Z. D. Zhang; L. Han; G. K. Ma; X. D. Zhang
	2007
发表期刊	Physica Status Solidi B-Basic Solid State Physics
ISSN	0370-1972
卷号	244 期号:12 页码:4678-4687
摘要	The magnon energy band in a three-layer ferromagnetic superlattice is studied by using the linear spin-wave approach and Green's function technique. It is found that two modulated energy gaps exist in the magnon energy band along K(x) direction perpendicular to the plane of the superlattice. The spin quantum numbers and the interlayer exchange couplings all affect the two energy gaps. The disappearance of one of the energy gaps corresponds to a high symmetry among the interlayer exchange couplings, while the vanishing of another energy gap corresponds to a high symmetry of the system, which belongs to the type III Shubnikov group or the polychromatic group of magnetic group. This magnetically structural symmetry includes not only the symmetry of crystallographic point-groups or space-groups, but also the symmetry of strength and direction of spins. Comparing with the previous results for a three-layer ferrimagnetic superlattice, it is concluded that the energy gap of the ferromagnetic/ferrimagnetic superlattices is dominated by different symmetries originated from ferromagiietic/antiferromagnetic interlayer exchange couplings. (C) 2007 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
部门归属	[qiu, rong-ke; ma, guang-kun; zhang, xu-dong] shenyang univ technol, shenyang 110023, peoples r china. [zhang, zhi-dong] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china. [qiu, rong-ke; zhang, zhi-dong] chinese acad sci, int ctr mat phys, shenyang 110016, peoples r china. [han, li] bei hua univ, jilin 132021, peoples r china.;qiu, rk (reprint author), shenyang univ technol, shenyang 110023, peoples r china;rkqiu@163.com
关键词	Spin-wave Theory Magnetically Structural Symmetry Layered Heisenberg Ferrimagnets Periodic Elastic Composites Acoustic Band-structure Magnetization Magnetoresistance 3-sublattice Multilayers Dependence
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WOS记录号	WOS:000252309500060
引用统计	被引频次：5[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/33791
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	R. K. Qiu,Z. D. Zhang,L. Han,et al. Magnon energy gap in a three-layer ferromagnetic superlattice[J]. Physica Status Solidi B-Basic Solid State Physics,2007,244(12):4678-4687.
APA	R. K. Qiu,Z. D. Zhang,L. Han,G. K. Ma,&X. D. Zhang.(2007).Magnon energy gap in a three-layer ferromagnetic superlattice.Physica Status Solidi B-Basic Solid State Physics,244(12),4678-4687.
MLA	R. K. Qiu,et al."Magnon energy gap in a three-layer ferromagnetic superlattice".Physica Status Solidi B-Basic Solid State Physics 244.12(2007):4678-4687.