Gd 3 TeBO 9 : A Rare-Earth Borate with Significant Magnetocaloric Effect

Magnetic refrigeration technology based on Gd-based paramagnets is expected to be applied to refrigeration in extremely low temperatures, thereby reducing the consumption of liquid helium. Here, we obtained a compound, Gd TeBO with high Gd concentration through element substitution. The Gd concentration in this compound is as high as 2.4×10 ions/kg, which is 33 % higher than the commercial Gd Ga O (GGG), and further magnetic tests show that Gd TeBO has a large magnetic entropy change (57.44 J/(kg K) and 408 mJ/(cm K) at 2.6 K and 7 T), which is 1.5 times that of GGG, implying the possibility of its further development as an potential magnetocaloric material.