Magnetocaloric effect in Nd doped perovskite La0.7−xNdxBa0.3MnO3 polycrystalline near room temperature

La _0.7−xNd _xBa _0.3MnO ₃ polycrystalline samples with different Nd content were prepared by a sol–gel method. The effects of Nd addition on the Curie temperature T _c and the magnetocaloric properties were investigated. The experimental results show that the addition of Nd enhances the magnetic entropy change and adjusts the Curie temperature efficiently in polycrystalline La _0.7−xNd _xBa _0.3MnO ₃ . Large magnetic entropy changes upon application of a low magnetic field and a wide temperature range of T _c suggest that these materials can be utilized as magnetic refrigerants near room temperature.