Method of effective potential for quantum Heisenberg ferromagnet theory

1994/02/08 by E. V. Podivilov, Podivilov, E. V.
Materials Science · Physics and Astronomy · #Condensed Matter (cond-mat) #FOS: Physical sciences #Magnetic Properties and Applications #Magnetic properties of thin films #Theoretical and Computational Physics #cond-mat

paper · pdf · doi:10.48550/arxiv.cond-mat/9402037

9 pages, Latex

arxiv created 1994/02/08 · openalex publication_date 1994/02/08 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

Self - consistent temperature dependence of the average magnetization in quantum Heisenberg ferromagnet is obtained as a first approximation of perturbation theory on an inverse radius by application of the functional method for quantum ferromagnet. The experimental data are compared with the theoretical results for \bf EuO ferromagnet. A quantitative agreement is observed between theoretical and experimental results outside interval near Curie temperature. The theory is of critical behavior in the vicinity of Curie temperature T_c. Theoretical T_c value itself is agreed with the experimental one with an accuracy of several percents.

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