Abstract
Abstract Magnetotransport properties and magnetocaloric effect of (La0.7Ba0.3MnO3)1-x/(Al2O3)x composites have been investigated through their theoretical and experimental studies. The Al2O3 addition increases the resistivity, showing up a crossover from 3D Mott to the soft gap variable range hopping (VRH). The relative cooling power of LBMO matrix (~98.77 Jkg−1, H = 2 T) is approximately 65 percentage of that of pure Gd (RCP = 153 Jkg−1, H = 2 T). It means to achieve an active magnetic refrigerator employing LBMO will need more than one and half times the volumes of a refrigerant unit consisting of pure Gd. A good concordance is observed as simulated both resistivity and magnetization curves.
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