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题名: Properties of exchange interaction in Yb3Fe5O12 under extreme conditions
作者: Wang W;  Li DY
发表日期: 2009
摘要: In Yb3Fe5O12, the exchange effective field can be expressed as H-eff = -lambda center dot center dot center dot M-Fe = -lambda chi(eff)center dot center dot center dot H-e = -gamma center dot center dot center dot H-e where gamma is named as the exchange field parameter and H-e is the external magnetic field. Then, in this paper, by the discussions on the characteristics of the exchange field parameter gamma, the properties of exchange interaction in ytterbium iron garnet (Yb3Fe5O12) are analyzed under extreme conditions (high magnetic fields and low temperatures). Our theory suggests that the exchange field parameter gamma is the function of the temperatures under different external magnetic fields, and gamma = a+b center dot center dot center dot T+c center dot center dot center dot T-2, where the coefficients a, b, c are associated with the external magnetic fields and the magnetized directions. Thus, the temperature-dependence, field-dependence and anisotropic characteristics of the exchange interaction in Yb3Fe5O12 are revealed. Also, excellent fits to the available experiments are obtained. (C) 2009 Elsevier B.V. All rights reserved.
KOS主题词: Exchange interaction;  Anisotropy;  temperature dependence
刊名: JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
专题: 中国科学院半导体研究所(2009年前)_期刊论文

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推荐引用方式:
Wang W ; Li DY .Properties of exchange interaction in Yb3Fe5O12 under extreme conditions ,JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS,2009 ,321(19):3307-3310
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