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 ... إقراء المزيد

The magnetocaloric effect (MCE) and electric-dielectric properties of the Nd-cobaltate perovskitesNd0.6Sr0.4Co1xMnxO3(x = 0, 0.3, 0.7 and 1) were investigated for possible use in magnetic cooling appli-cations. Upon Mn substitution, the magnetic exchange interaction is affected by the (Mn4+/Mn3+) ratio,which in turn impacts several physical properties. The XRD patterns of the synthesized compositesrevealed a single phase with an orthorhombic structure with ... إقراء المزيد