A large magnetic entropy change near room temperature in La0.8Ba0.1Ca0.1Mn0.97Fe0.03O3 perovskite

In this paper, we have studied the structural, magnetic and magnetocaloric properties of the perovskite manganite La0.8Ba0.1Ca0.1Mn0.97Fe0.03O3. X-ray diffraction pattern has been recorded at room temperature and this could be indexed to the rhombohedra perovskite structure with space group. The magnetocaloric effect and transition order were investigated by dc magnetization measurement. A maximum entropy change of 4.28 J/kg K and a refrigerant capacity of 241 J/kg were observed at an external field change of 5 T. The phenomenon of large magnetic entropy change and the convenient adjustment of the Curie temperature make the perovskite-type manganese oxides useful for magnetic refrigerants in an extended high temperature range even at room temperature (RT). (C) 2014 Published by Elsevier B.V.