Theoretical work on magnetocaloric effect in La0.75Ca0.25MnO3
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In this work, a phenomenological model is applied to describe the magnetocaloric effect for the La0.75Ca0.25MnO3 system near a second-order phase transition from a ferromagnetic to a paramagnetic state. Based on this model, it can predict the values of the magnetocaloric properties from calculation of magnetization as a function of temperature under different external magnetic fields. The magnetic entropy change reaches a peak of about 5.39 J/(kg·K) at 257 K upon 4 T applied field variation. The ΔSM distribution is much more uniform than that of gadolinium, which is desirable for an Ericson-cycle magnetic refrigerator.
Key wordsmagnetocaloric effect model magnetic entropy change heat capacity change relative cooling power
- Hamad MA. Investigations on electrocaloric properties of  oriented 0.955PbZn1/3Nb2/3O3-0.045PbTiO3 single crystals. Phase Transition 2012, DOI: 10.1080/01411594.2012.674527.Google Scholar
- Hamad MA. Magnetocaloric effect in Ge0.95Mn0.05 films. J Supercond Nov Magn 2012, DOI: 10.1007/s10948-012-1762-3.Google Scholar
- Hamad MA. Theoretical work on magnetocaloric effect in ceramic and sol-gel La0.67Ca0.33MnO3. J Therm Anal Calorim 2012, DOI: 10.1007/s10973-012-2505-1.Google Scholar
- Hamad MA. Magnetocaloric properties of La0.6Ca0.4MnO3. J Therm Anal Calorim 2012, DOI: 10.1007/s10973-012-2723-6.Google Scholar
- Baldini M, Capogna L, Capone M, et al. Pressure induced magnetic phase separation in La0.75Ca0.25MnO3 manganite. J Phys: Condens Matter 2012, 24: 045601.Google Scholar
- Hamad MA. Calculations on nanocrystalline CoFe2O4 prepared by polymeric precursor method. J Supercond Nov Magn 2012, DOI: 10.1007/s10948-012-1783-y.Google Scholar
- Williams DV. Characterization of the structural and magnetic properties of Gd thin films. Ph.D. Thesis. Florida (USA): University of South Florida, 2010.Google Scholar
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