Large magnetic entropy change above 300K in (La0.56Ce0.14)Sr0.3MnO3 perovskite

Abstract: Magnetic field dependence of the magnetic entropy change (ΔS M) is the key for magnetic refrigeration. A large magnetic entropy change (ΔS M) associated with the ferromagnetic-paramagnetic transition in Ce-doped La0.7Sr0.3MnO3 material has been observed. It is shown for (La0.56Ce0.14)Sr0.3MnO3 composition at the Curie temperature of 357K, that the maxima of the magnetic entropy changes upon variation of the applied magnetic field at 1 and 5T are about 1.55 and 4.78Jkg−1 K−1, respectively. Due to the large (ΔS M) and high Curie temperature, the (La0.56Ce0.14)Sr0.3MnO3 perovskite is suggested to be used as potential magnetic refrigerants for magnetic refrigeration technology above room temperature. [Copyright &y& Elsevier]