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Multicomponent CPA theory for spin‐wave excitations in diluted ferromagnets

 

作者: L. M. Roth,  

 

期刊: Journal of Applied Physics  (AIP Available online 1978)
卷期: Volume 49, issue 3  

页码: 2139-2141

 

ISSN:0021-8979

 

年代: 1978

 

DOI:10.1063/1.324710

 

出版商: AIP

 

数据来源: AIP

 

摘要:

We describe a multicomponent coherent potential approximation for the diluted ferromagnet, which includes the effect of the environment on the Ising diagonal energy levels of a site as does previous work, and which also takes account of short‐range order, i.e., the correlation between environments of neighboring sites. Results are presented for simple and body centered cubic cases, and compare well with computer simulation results. They show little difference from the single site CPA theory, a simplified version of which is presented. We expect to find greater differences for the diluted antiferromagnet.

 

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