Effect of optical phonon-magnon interaction on the magnon life-time at finite temperature

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	Effect of optical phonon-magnon interaction on the magnon life-time at finite temperature
其他题名	Effect of optical phonon-magnon interaction on the magnon life-time at finite temperature
	Cheng TaiMin 1; Luo HongChao 1; Li Lin 2
	2008
发表期刊	ACTA PHYSICA SINICA
ISSN	1000-3290
卷号	57 期号:10 页码:6531-6539
摘要	A magnon-phonon interaction model is set up in a two-dimensional ferromagnetic double square-lattice system. By using the Matsubara Green function theory we have studied the magnon life-time of the system, calculated the magnon damping curves on the main symmetric line in the Brillouin zone, compared the influences of magnetic ion optical-mode phonon and non-magnetic ion optical-mode phonon on the magnon damping of the system, and discussed the influences of the parameter variations and temperature on the magnon damping. The results show that the coupling of the optical-mode phonon and magnon plays the main role in the magnon damping, especially, the longitudinal optical-mode phonon contributes the most for the magnon damping. It is also found that the effect of the nonmagnetic ion on magnon damping is more significant than that of the magnetic ion. According to the expression - Im Sigma*((1)) (k) = (h) over bar/(2 tau), the magnon life-time is discussed.
关键词	SPIN MANGANITES ZONE EXCITATION optical mode phonon-magnon interaction magnon damping magnon life-time insulating double square-lattice ferromagnetic system
收录类别	CSCD
语种	英语
资助项目	[National Natural Science Foundation of China] ; [Natural Science Foundation of Liaoning Province and Shenyang City, China] ; [Scientific Research Foundation of the Educational Bureau of Liaoning Province, China]
CSCD记录号	CSCD:3462251
引用统计
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/156995
专题	中国科学院金属研究所
作者单位	1.中国科学院金属研究所 2.东北大学
推荐引用方式 GB/T 7714	Cheng TaiMin,Luo HongChao,Li Lin. Effect of optical phonon-magnon interaction on the magnon life-time at finite temperature[J]. ACTA PHYSICA SINICA,2008,57(10):6531-6539.
APA	Cheng TaiMin,Luo HongChao,&Li Lin.(2008).Effect of optical phonon-magnon interaction on the magnon life-time at finite temperature.ACTA PHYSICA SINICA,57(10),6531-6539.
MLA	Cheng TaiMin,et al."Effect of optical phonon-magnon interaction on the magnon life-time at finite temperature".ACTA PHYSICA SINICA 57.10(2008):6531-6539.