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Effect of optical phonon-magnon interaction on the magnon life-time at finite temperature
Alternative TitleEffect of optical phonon-magnon interaction on the magnon life-time at finite temperature
Cheng TaiMin1; Luo HongChao1; Li Lin2
2008
Source PublicationACTA PHYSICA SINICA
ISSN1000-3290
Volume57Issue:10Pages:6531-6539
AbstractA 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.
KeywordSPIN MANGANITES ZONE EXCITATION optical mode phonon-magnon interaction magnon damping magnon life-time insulating double square-lattice ferromagnetic system
Indexed ByCSCD
Language英语
Funding Project[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 IDCSCD:3462251
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Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/156995
Collection中国科学院金属研究所
Affiliation1.中国科学院金属研究所
2.东北大学
Recommended Citation
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.
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