Gd3 TeBO9 : A Rare-Earth Borate with Significant Magnetocaloric Effect
Changqing Zhou1,2, Rukang Li1,2
1Beijing Center for Crystal Research and Development Key Laboratory of Functional Crystals and Laser Technology, Technical Institute of Physics and Chemistry Chinese Academy of Sciences, Beijing, 100190, China.
Abstract:
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, Gd3 TeBO9 with high Gd3+ concentration through element substitution. The Gd3+ concentration in this compound is as high as 2.4×1024 ions/kg, which is 33 % higher than the commercial Gd3 Ga5 O12 (GGG), and further magnetic tests show that Gd3 TeBO9 has a large magnetic entropy change (57.44 J/(kg K) and 408 mJ/(cm3 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.
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