On magnon energy branches of multilayer ferrimagnetic superlattices

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	On magnon energy branches of multilayer ferrimagnetic superlattices
	R. K. Qiu; Z. D. Zhang
	2007
发表期刊	Physica Status Solidi B-Basic Solid State Physics
ISSN	0370-1972
卷号	244 期号:10 页码:3754-3758
摘要	The magnon energy branches of multilayer ferrimagnetic superlattices are discussed, as regards the linear spin-wave approach and Green's function technique. It is argued that negative energy branches in the spin-wave spectra of the ferrimagnetic systems have physical significance, which is responsible for the zero-point motion (i.e. the quantum fluctuations) in the ground state, since the sign of omega(1)(k) indicates the direction in which the spin-wave mode propagates. On boson Green's function treatment, the results calculated for physical properties with consideration of negative energy spectra are correct and the consequent conclusions do not need to be re-examined. Even for the definition of energy gaps, nothing is wrong from the theoretical point of view if one considers both negative and positive energy spectra, but one may need to consider two different definitions (one considers the negative/positive energy spectra; the other only the positive ones), from the experimental point of view, to compare both of them with experimental data, in an attempt to detect whether the negative energy branch does excite or not. 0 2007 WILEY-VCH Verlag GmbH & Co. KGaA. Weinheim.
部门归属	chinese acad sci, met res inst, shenyang natl lab mat sci, shenyang 110016, peoples r china. chinese acad sci, int ctr mat phys, shenyang 110016, peoples r china. shenyang univ technol, shenyang 110023, peoples r china.;qiu, rk (reprint author), chinese acad sci, met res inst, shenyang natl lab mat sci, shenyang 110016, peoples r china;rkqiu@163.com
关键词	Surface Spin-waves Magnetically Structural Symmetry 2-sublattice Ferrimagnets Heisenberg Ferrimagnet 3-layer Superlattices Internal Energy Systems Magnetization 3-sublattice Ferromagnet
URL	查看原文
WOS记录号	WOS:000250256000031
引用统计	被引频次：3[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/321006/33789
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. On magnon energy branches of multilayer ferrimagnetic superlattices[J]. Physica Status Solidi B-Basic Solid State Physics,2007,244(10):3754-3758.
APA	R. K. Qiu,&Z. D. Zhang.(2007).On magnon energy branches of multilayer ferrimagnetic superlattices.Physica Status Solidi B-Basic Solid State Physics,244(10),3754-3758.
MLA	R. K. Qiu,et al."On magnon energy branches of multilayer ferrimagnetic superlattices".Physica Status Solidi B-Basic Solid State Physics 244.10(2007):3754-3758.