Theory of magnetic susceptibility of dilute magnetic alloys
1971; Elsevier BV; Volume: 32; Issue: 2 Linguagem: Inglês
10.1016/0022-3697(71)90023-0
ISSN1879-2553
Autores Tópico(s)Quantum and electron transport phenomena
ResumoA parquet diagrammatic approach is developed for the calculation of the magnetic susceptibility of dilute magnetic alloys. Starting from the graphs which generate the free energy in Suhl's theory, one obtains the diagrams which represent the magnetic susceptibility. In our perturbation calculation, the Curie constant goes like S(S+1)(μBg)21−2JρN −4JρN21n1T−8JρN 31n21T+…. We also approximate the spin flip vertex function which appears in the susceptibility diagrams by Suhl's spin flip scattering matrix, in order to analyze the problem in a non-perturbative manner. At high temperature the result agrees with our perturbation calculation, and the Curie constant becomes S(S+1)(μBg)21−22S+1+In1T−1 as T → 0.
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