Magnetocaloric effect study of Pr0.67Ca0.33MnO3-La0.67Sr0.33MnO3 nanocomposite

Abstract The present study involves investigaton of magnetocaloric effect of Pr 0.67 Ca 0.33 MnO 3 -La 0.67 Sr 0.33 MnO 3 nanocomposite materials above room temperature. From application point of view in magnetic refrigeration our study highlights the enhancement of operating temperature region compared to the well known La 0.67 Sr 0.33 MnO 3 refrigerant material above room temperature. Comparison has also been made with the magnetocaloric properties of La 0.67 Sr 0.33 MnO 3 nanomaterials. The modification of the magnetocaloric entropy changes (broadening of the temperature dependent magnetic entropy change) is addressed due to the effect of the gradual melting of antiferromagnetic charge ordered state of the Pr 0.67 Ca 0.33 MnO 3 nanoparticles in such nanocomposite materials.