Magnetocaloric Effect in La0.7Cd0.3MnO3, La0.7Ba0.3MnO3, and Nd0.7Sr0.3MnO3

We have based on isothermal magnetization curves to study the magnetocaloric effect (MCE) in fine-grained perovskite manganites of La0.7Cd0.3MnO3 (LCMO), La0.7Ba0.3MnO3 (LBMO), and Nd0.7Sr0.3MnO3 (NSMO) prepared by conventional solid-state reaction. Magnetic measurements were performed on a vibrating sample magnetometer, with a temperature increment of 1.0 K, and the applied field in the range of 0–1.8 T. Under an applied field of 1.8 T, the maximum magnetic-entropy change obtained for LCMO, LBMO, and NSMO taking place at their Curie temperature are about 2.3, 2.1, and 5.1 J/(kg⋅K), respectively. The large entropy change in NSMO makes it suitable for magnetic-cooling applications.