Quantum fluctuation and the magnetically structural symmetry in ferrimagnetic superlattices

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	Quantum fluctuation and the magnetically structural symmetry in 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:6 页码:2217-2232
摘要	The magnetization and the quantum fluctuations in several ferrimagnetic superlattices consisting of 2-6 different magnetic sublayers are studied by employing Holstein-Primakoff transformations and Green's functions technique only for zero temperature. Investigating ferrimagnetic superlattices with different magnetic sublayers and different spin configurations, we find that when some of spin quantum numbers are adjusted, some sublayer magnetizations at zero-temperature exhibit a minimum, correspondingly, the quantum fluctuation of the system exhibits a maximum point. Different spin configurations have different quantum fluctuations of the system. The maximum point of the quantum fluctuation of the system is related with higher symmetry of the system. It differs from the symmetry of crystallographic point-groups or space-groups, but belongs to the type III Shubnikou group of magnetic group, which describes anti-ferromagnetic or ferrimagnetic state. We define it as the magnetically structural symmetry. The higher the magnetically structural symmetry of the system is, the stronger the quantum fluctuation of the system is, for varying spin quantum numbers and different spin configurations. (C) 2007 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
部门归属	chinese acad sci, inst met res, shenyang natl lab mat 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, inst met res, shenyang natl lab mat sci, int ctr mat phys, shenyang 110016, peoples r china;rkqiu@163.com
关键词	Spin-wave Theory Layered Heisenberg Ferrimagnets Ferromagnetic Multilayers Antiferromagnet Magnetization Systems Magnetoresistance Dynamics Magnets Lattice
URL	查看原文
WOS记录号	WOS:000247328200060
引用统计	被引频次：6[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/321006/33790
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. Quantum fluctuation and the magnetically structural symmetry in ferrimagnetic superlattices[J]. Physica Status Solidi B-Basic Solid State Physics,2007,244(6):2217-2232.
APA	R. K. Qiu,&Z. D. Zhang.(2007).Quantum fluctuation and the magnetically structural symmetry in ferrimagnetic superlattices.Physica Status Solidi B-Basic Solid State Physics,244(6),2217-2232.
MLA	R. K. Qiu,et al."Quantum fluctuation and the magnetically structural symmetry in ferrimagnetic superlattices".Physica Status Solidi B-Basic Solid State Physics 244.6(2007):2217-2232.