doiSerbia

Magnetocaloric effect in Sr2FeMoO6/Ag composites

Hamad Mahmoud A. (Tanta University, Faculty of Science, Physics Department, Tanta, Egypt + Al Jouf University, College of Science, Physics Department, Al Jouf, Skaka, Saudi Arabia)

The enhanced low-field magnetocaloric effect was investigated for double perovskite Sr2FeMoO6 - silver (SFMO/Ag) composites with 0, 5 and 10 wt.% of Ag. A phenomenological model was used to predict magnetocaloric properties of SFMO/Ag composites, such as magnetic entropy change, heat capacity change and relative cooling power. It was shown that magnetic entropy change (ΔS M) peaks of SFMO/Ag span over a wide temperature region, which can significantly improve the global efficiency of the magnetic refrigeration. Furthermore, the ΔS M distribution of the SFMO/Ag composites is much more uniform than that of gadolinium. Through these results, SFMO/Ag composite has some potential application for magnetic refrigerants in an extended high-temperature range.

Keywords: Sr2FeMoO6/Ag composites, magnetocaloric effect, modelling