Effect of phonons on the magnetic characteristics of metals at finite temperatures

N. B. Melnikov   ; G. V. Paradezhenko   ; B. I. Reser

Teoretičeskaâ i matematičeskaâ fizika, Tome 201 (2019) no. 1, pp. 137-148

Résumé

We consider the electron–phonon interaction in the framework of dynamic spin-fluctuation theory and obtain an expression for the self-energy part that depends explicitly on the spin fluctuations and lattice vibrations. We illustrate the theoretical results with the example of iron. We show that the effect of phonons on temperature dependence of the magnetic characteristics of metals is appreciable but not as large as in the static single-site approximation of the spin-fluctuation theory and spin dynamics using classical Hamiltonians.

Détail

Keywords: spin fluctuation, magnetization, magnetic susceptibility, local magnetic moment, temperature dependence, ferromagnetic metal.
Mots-clés : phonon

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