Magnon energy gap and the magnetically structural symmetry in a three-layer ferrimagnetic superlattice

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	Magnon energy gap and the magnetically structural symmetry in a three-layer ferrimagnetic superlattice
	R. K. Qiu; Z. D. Zhang; L. Q. Guo; C. H. Ying; A. Liang
	2006
发表期刊	Physica Status Solidi B-Basic Solid State Physics
ISSN	0370-1972
卷号	243 期号:8 页码:1983-1995
摘要	The magnon energy band in a ferrimagnetic superlattice with three layers in a unit cell is studied by employing retarded Green's functions and the spin-wave method. Two modulated energy gaps Delta omega(13) and Delta omega(23) are evaluated systematically, which exist in the magnon energy band along the K-x-direction perpendicular to the plane of the superlattice. It is revealed that the energy gap Delta omega(13) has a direct relation with the symmetry among the spin quantum numbers and the interlayer exchange couplings, while the energy gap Delta omega(23) relates to the symmetry among these spin quantum numbers only. These symmetries differ from the symmetry of crystallographic point groups. We define the magnetically structural symmetry that is dominated mainly by the magnetic parameters. The absence of the energy gap at a certain condition means that the system has a high magnetically structural Symmetry. The magnetically structural symmetry perlattice, which is an intrinsic property, strongly affects the magnon energy band structure and thus the magnetic behaviors of the system. Furthermore, two complete bandgaps are observed to extend through the Brillouin zone (referred to as "magnonic crystal") in this superlattice system. (c) 2006 WILEY-VCH Verlag GmbH & Co. KGaA. Weinheim
部门归属	shenyang univ technol, shenyang 110023, peoples r china. chinese acad sci, shenyang natl lab mat sci, inst met res, shenyang 110016, peoples r china. 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	Periodic Elastic Composites Acoustic Band-structure Spin-waves Ferromagnetic Superlattices Voigt Configuration Internal Energy Exchange Magnetization Multilayers Systems
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WOS记录号	WOS:000239100800038
引用统计	被引频次：17[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/321006/34429
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. Q. Guo,et al. Magnon energy gap and the magnetically structural symmetry in a three-layer ferrimagnetic superlattice[J]. Physica Status Solidi B-Basic Solid State Physics,2006,243(8):1983-1995.
APA	R. K. Qiu,Z. D. Zhang,L. Q. Guo,C. H. Ying,&A. Liang.(2006).Magnon energy gap and the magnetically structural symmetry in a three-layer ferrimagnetic superlattice.Physica Status Solidi B-Basic Solid State Physics,243(8),1983-1995.
MLA	R. K. Qiu,et al."Magnon energy gap and the magnetically structural symmetry in a three-layer ferrimagnetic superlattice".Physica Status Solidi B-Basic Solid State Physics 243.8(2006):1983-1995.