Transverse acoustic phonon excitation of two-dimensional Heisenberg ferromagnetic system

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	Transverse acoustic phonon excitation of two-dimensional Heisenberg ferromagnetic system
其他题名	Transverse acoustic phonon excitation of two-dimensional Heisenberg ferromagnetic system
	Cheng TaiMin 1; Ze Xianyu 1
	2006
发表期刊	ACTA PHYSICA SINICA
ISSN	1000-3290
卷号	55 期号:9 页码:4828-4836
摘要	A magnon-phonon inter-action model is developed on the basis of two-dimensional square Heisenberg ferromagnetic system. The transverse acoustic phonon excitation is studied through Matsubara Green function theory, and the transverse acoustic phonon dispersion curve is calculated at the main symmetric point and on the symmetric line in the first Brillouin zone. It's found that on the line Sigma in first Brillouin zone, there is hardening for the transverse acoustic phonon in the smaller wave vector zone (point Gamma near k(x)a < 0.2), but there is softening for the transverse acoustic phonon in the softening zone (0.25 < k(x)a < 0.7), there is hardening for the transverse acoustic phonon at point M near (0.75 < k(x)a). On the line Delta, there is no phonon softening and hardening for transverse acoustic phonon. On the line Z, there is softening for transverse acoustic phonon in smaller wave vector zone (point X near k(x)a < 0.65), but there is hardening for the transverse acoustic phonon at the point M nearby. The influences of different parameters on the transverse acoustic phonon excitation are also illustrated. It's found that the coupling of the magnon-phonon coupling and the spin wave stiffness are the main factors affecting the transverse acoustic phonon softening.
关键词	DENSITY-OF-STATES INVAR ALLOY LATTICE-DYNAMICS MAGNON FE86CO4ZR10 MAGNETISM MECHANISM FE3PT magnon-phonon interaction transverse acoustic phonon softening Matsubara Green function theory ferromagnetic system
收录类别	CSCD
语种	英语
CSCD记录号	CSCD:2442931
引用统计	被引频次：3[CSCD] [CSCD记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/158256
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.NE University
推荐引用方式 GB/T 7714	Cheng TaiMin,Ze Xianyu. Transverse acoustic phonon excitation of two-dimensional Heisenberg ferromagnetic system[J]. ACTA PHYSICA SINICA,2006,55(9):4828-4836.
APA	Cheng TaiMin,&Ze Xianyu.(2006).Transverse acoustic phonon excitation of two-dimensional Heisenberg ferromagnetic system.ACTA PHYSICA SINICA,55(9),4828-4836.
MLA	Cheng TaiMin,et al."Transverse acoustic phonon excitation of two-dimensional Heisenberg ferromagnetic system".ACTA PHYSICA SINICA 55.9(2006):4828-4836.