Mean-Field Approximation Analysis of Magnetocaloric Effect in Rare-Earth Materials
This paper describes the results of a computer simulation analysis of the magnetocaloric effect (MCE) in rare earth metals and rare earth based materials. The analysis was previously developed for calculating peak values of the MCE in rare earth magnets using a mean-field approximation. This study concentrates on the variation of the key thermodynamic parameters such as magnetic field, temperature, Curie and Debye temperatures of the magnets in wide range of their values. The results of theoretical studies of the MCE in large magnetic fields are described. The possible mechanisms of magnetic entropy change in a paraprocess region are discussed. The study shows strong influence of the Debye temperature of the magnets on the MCE value in the wide temperature region (from 4.2 K to 200–230 K).
KeywordsHigh Magnetic Field Debye Temperature Magnetocaloric Effect Magnetic Entropy Change Magnetic Refrigeration
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