Theoretical consideration of the stability of an L10 magnetic phase in Fe–(Pd, Pt) alloy clusters
Theoretical consideration of the stability of an L10 magnetic phase in Fe–(Pd, Pt) alloy clusters
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Fe-(Pd, Pt)合金团簇中L10磁性相稳定性的理论思考
DOI：
10.1080/09500830310001628257
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发表时间：
2004
影响因子：
1.2
通讯作者：
N. Tanaka
中科院分区：
文献类型：
--
作者：
S. Fukami;N. Tanaka
基于布拉格和威廉姆斯的理论，从理论上研究了尺寸对二元合金团簇有序-无序转变的影响，特别是Fe-(Pd, Pt)团簇。包括团簇表面（界面）处的断裂键，制定了最近从各种实验研究中提出的有序度与团簇尺寸之间的关系。推导了临界尺寸对温度的依赖性以及有序-无序转变温度对团簇尺寸的依赖性。与实验存在轻微的定量分歧，但这可以通过考虑对高阶项进行一些修改来改善。
Size effects on the order–disorder transition of binary alloy clusters, particularly Fe–(Pd, Pt) clusters, are studied theoretically, based on the theory of Bragg and Williams. Including the broken bonds at surfaces (interfaces) of the clusters, the relationship between the degree of order and the cluster size, which has recently been suggested from various experimental studies, is formulated. The dependences of the critical size on the temperature and the order–disorder transformation temperature on the cluster size are derived. There is a slight quantitative disagreement with experiment, but this may be improved by considering some modification of higher-order terms.