Abstract

Abstract The Nd0.5Sr0.5Mn1−xCuxO3 (x=0.00; 0.02; 0.10) and Nd0.25Pr0.25Sr0.5MnO3 perovskites have been prepared by solid reaction technology. The manganites are of single phase with orthorhombic structure. The FC and ZFC measurements show an evident existence of charge-ordering effect at low temperatures. At the charge-ordering temperature the magnetic entropy change, ΔS, is positive and the |ΔSmax| is larger than that determined at ferromagnetic-paramagnetic phase transition temperature.

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