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

Highlights: • Magnetocaloric properties indicate the relative cooling power of nanocomposite material. • It is significantly large near room temperature. • Nanocomposite material which may be important for technological point of view. The present study involves investigaton of magnetocaloric effect of Pr_0.67Ca_0.33MnO₃-La_0.67Sr_0.33MnO₃ 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_0.67Sr_0.33MnO₃ refrigerant material above room temperature. Comparison has also been made with the magnetocaloric properties of La_0.67Sr_0.33MnO₃ 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_0.67Ca_0.33MnO₃ nanoparticles in such nanocomposite materials.