Magnetic Properties of Binary Alloys: Model of Uniform Exchange Interactions
- 15 April 1972
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 5 (8), 2872-2880
- https://doi.org/10.1103/physrevb.5.2872
Abstract
The paramagnetic spin susceptibility of substitutional binary alloys at is calculated in the framework of the coherent-potential approximation. Vertex corrections to the polarization diagram are found to be important and are included. Numerical values of with and (1, 1, 1) in a simple-cubic crystal having lattice spacing are explicitly calculated under some approximations, for the density of states. From the electron-number-density dependence of thus obtained, we deduce the kind of magnetic state arising after a second-order transition from the paramagnetic state. This shows that in the model with uniform exchange interaction between electrons the commensurate antiferromagnetic state occurs for a finite region of electron number density . This is in contrast to the case of the perfect crystal discussed by Penn which shows the commensurate antiferromagnetic state occurs only for .
Keywords
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