Magnon energy gap in a four-layer ferromagnetic superlattice

IMR OpenIR

	Magnon energy gap in a four-layer ferromagnetic superlattice
	R. K. Qiu; P. P. Song; Z. D. Zhang; L. Q. Guo
	2008
发表期刊	Chinese Physics B
ISSN	1674-1056
卷号	17 期号:10 页码:3894-3901
摘要	The magnon energy band in a four-layer ferromagnetic superlattice is studied by using the linear spin-wave approach and Green's function technique. It is found that three modulated energy gaps exist in the magnon energy band along K. direction perpendicular to the superlattice plane. The spin quantum numbers and the interlayer exchange couplings all affect the three energy gaps. The magnon energy gaps of the four-layer ferromagnetic superlattice are different from those of the three-layer one. For the four-layer ferromagnetic superlattice, the disappearance of the magnon energy gaps Delta(omega 12), Delta(omega 23) and Delta(omega 34) all correlates with the symmetry of this system. The zero energy gap Delta(omega 23) correlates with the symmetry of interlayer exchange couplings, while the vanishing of the magnon energy gaps Delta(omega 12) and Delta(omega 34) corresponds to a translational symmetry of x-direction in the lattice. When the parameters of the system deviate from these symmetries, the three energy gaps will increase.
部门归属	[qiu rong-ke; song pan-pan; guo lian-quan] shenyang univ technol, shenyang 110023, peoples r china. [qiu rong-ke; 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.;qiu, rk (reprint author), shenyang univ technol, shenyang 110023, peoples r china;rkqiu@163.com
关键词	Layered Ferromagnetic Superlattice Magnon Energy Gap Spin Quantum Number Interlayer Exchange Couplings Spin-wave Theory Layered Heisenberg Ferrimagnets Magnetic-structures Exchange Magnetoresistance Multilayers Composites Dependence Bilayer
URL	查看原文
WOS记录号	WOS:000260263800056
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/321006/33055
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	R. K. Qiu,P. P. Song,Z. D. Zhang,et al. Magnon energy gap in a four-layer ferromagnetic superlattice[J]. Chinese Physics B,2008,17(10):3894-3901.
APA	R. K. Qiu,P. P. Song,Z. D. Zhang,&L. Q. Guo.(2008).Magnon energy gap in a four-layer ferromagnetic superlattice.Chinese Physics B,17(10),3894-3901.
MLA	R. K. Qiu,et al."Magnon energy gap in a four-layer ferromagnetic superlattice".Chinese Physics B 17.10(2008):3894-3901.