The dependence of magnetization on the variation of temperature for La0.67Ca0.33MnO3 and La0.67Sr0.33MnO3 perovskite-type ceramic materials under an external magnetic field was modelled. Application of phenomenological model was performed, showing a good agreement with the experimental data. Temperature dependence of change of both magnetic entropy and specific heat under magnetic field 0.05 T was predicted for La0.67Ca0.33MnO3 and La0.67Sr0.33MnO3. Predicted values of maximum magnetic entropy change, full-width at half-maximum, relative cooling power and maximum specific heat under 0.05 T were evaluated.
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Mahmoud A. Hamad (2011) studied this question.
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