Magnetocaloric effect in La0.7Sr0.3MnO3/Ta2O5 composites

Abstract

The magnetocaloric effect (MCE) achieved for La0.7Sr0.3MnO3/Ta2O5 composites has been investigated. The maximum value of magnetic entropy change of La0.7Sr0.3MnO3 composites is found to decrease slightly with the further increasing of Ta2O5 concentration. It is shown that La0.7Sr0.3MnO3/Ta2O5 composites exhibit much more uniform magnetic entropy change than that of gadolinium. Moreover, the results indicate that the temperature range between 100 K and 400 K can be covered using the La0.7Sr0.3MnO3/Ta2O5 composites. Therefore, MCE makes the composites promising for room-temperature magnetic cooling applications.