Magnetization, internal energy and specific heat in a three-sublattice ferrimagnet or ferromagnet with vertical bar J(ab)vertical bar=vertical bar J(bc)vertical bar not equal J(ca)

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	Magnetization, internal energy and specific heat in a three-sublattice ferrimagnet or ferromagnet with vertical bar J(ab)vertical bar=vertical bar J(bc)vertical bar not equal J(ca)
	R. K. Qiu ; Z. D. Zhang
刊名	Journal of Physics-Condensed Matter
	2001
卷号	13 期号:18 页码:4165-4180
关键词	layered heisenberg ferrimagnets spin-wave theory elementary excitations superlattices systems magnetoresistance antiferromagnet interfaces
ISSN号	0953-8984
中文摘要	The temperature dependences of the magnetization, internal energy and specific heat in a three-sublattice ferrimagnet or ferromagnet with /J(ab)/ = /J(bc)/ not equal /J(ca)/ are calculated within the framework of the linear spin-wave approximation, by employing retarded Green's functions. For both the ferromagnet and the ferrimagnet, the internal energy and the specific heat decrease with increasing J ' /J and/or the value of the spins. For fixed values of S,, Sb, S, and J ' /J, the internal energy and the specific heat increase, whereas the sublattice magnetization decreases with increasing temperature theta. The three-sublattice ferrimagnet has some particular characteristics which are not shown by the systems with two sublattices. For ferrimagnets, the antiferromagnetism of the system becomes weaker with increasing J ' /J. The sublattice magnetization at low temperatures (also the magnetization M(0) at 0 K) of a ferrimagnet increases with increasing J ' /J for fixed values of S(a), S(b) and S(c). The effects of the spins S(a) (S,) and Sb On the magnetizations of other sublattices differ. The characteristics of the a-sublattice are the same as those of the c-sublattice, due to their similarity as well as the symmetry of the system. The behaviours of the b-sublattice are different from those of the a- and c-sublattices, due to the asymmetry of the three-sublattice system. The spin-value dependences of the spin deviation Deltam per spin land also the energy for the zero-point quantum fluctuation) of the system are different for different sublattices. These differences are ascribed to the asymmetry of the three-sublattice systems, which leads to the new intrinsic properties of the systems.
原文出处	://WOS:000168910800026
公开日期	2012-04-14
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/36780]
专题	金属研究所_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. Magnetization, internal energy and specific heat in a three-sublattice ferrimagnet or ferromagnet with vertical bar J(ab)vertical bar=vertical bar J(bc)vertical bar not equal J(ca)[J]. Journal of Physics-Condensed Matter,2001,13(18):4165-4180.
APA	R. K. Qiu,&Z. D. Zhang.(2001).Magnetization, internal energy and specific heat in a three-sublattice ferrimagnet or ferromagnet with vertical bar J(ab)vertical bar=vertical bar J(bc)vertical bar not equal J(ca).Journal of Physics-Condensed Matter,13(18),4165-4180.
MLA	R. K. Qiu,et al."Magnetization, internal energy and specific heat in a three-sublattice ferrimagnet or ferromagnet with vertical bar J(ab)vertical bar=vertical bar J(bc)vertical bar not equal J(ca)".Journal of Physics-Condensed Matter 13.18(2001):4165-4180.