Recent progress in the development of RE2TMTM'O6 double perovskite oxides for cryogenic magnetic refrigeration

The magnetic functional materials play a particularly important role in our modern society and daily life. The magnetocaloric effect (MCE) is at the basis of a solid state magnetic refrigeration (MR) technology which may enhance the efficiency of cooling systems, both for room temperature and cryogenic appli-cations. Despite numerous experimental and theoretical MCE studies, commercial MR systems are still at developing stage. Designing magnetic solids with outstanding magnetocaloric performances remains therefore a most urgent task. Herein, recent progresses on characterizing the crystal structure, magnetic properties and cryogenic MCE of rare earths ( RE )-based RE2TMTM'O-6 double perovskite (DP) oxides, where TM and TM ' are different 3d transition metals, are summarized. Some Gd-based DP oxides are found to exhibit promising cryogenic magnetocaloric performances which make them attractive for active MR ap-plications. (C) 2022 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.

Automated summary

Magnetic functional materials play a crucial role in our society and daily life. The magnetocaloric effect (MCE) is the foundation of solid-state magnetic refrigeration technology, which can improve the efficiency of cooling systems. Designing magnetic solids with excellent magnetocaloric performance is still an urgent task. This article summarizes recent progress in characterizing the crystal structure, magnetic properties, and cryogenic MCE of rare earth-based double perovskite oxides, and identifies some Gd-based oxides that exhibit promising cryogenic magnetocaloric performance.