Study of magnetic entropy change in La_0.65Sr_0.35Cu_0.1Mn_0.9O₃ complex perovskite

The magnetocaloric properties of new complex magnetic material La_0.65Sr_0.35Cu_0.1Mn_0.9O₃, suitable for the Ericsson cycle, have been investigated. For this material, the effect of Cu doping can be attributed to a combination of doping disorder, Cu-Mn super exchange interactions and a site-percolation mechanism, which suppress the metallic conduction and Curie temperature. The Curie temperature decreases to 355 K. The magnetocaloric study exposes a comparable value of the magnetic entropy change for La_0.65Sr_0.35Cu_0.1Mn_0.9O₃ sample, the value of the maximum entropy change, increases from 1.132 J/kgK to 3.11 J/kgK as magnetic field increases from 1 T to 4 T. A large relative cooling power (RCP) has been observed for La_0.65Sr_0.35Cu_0.1Mn_0.9O_3. As a result, the studied sample can be considered as potential material for magnetic refrigeration.