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, P. R. China.
Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, P. R. China.
Inorg Chem. 2023 Jul 3;62(26):10263-10268. doi: 10.1021/acs.inorgchem.3c01060. Epub 2023 Jun 20.
A single crystal of SrGd(BO) has been successfully grown through a high-temperature solution technique with KO-KF-BO as the flux. It crystallizes in the space group with parameters = 22.3153(5) Å, = 15.9087(4) Å, = 8.7507(2) Å, and = 2. SrGd(BO) has a three-dimensional (3D) framework built from [GdO] chains, in which the isolate [BO] groups and Sr ions fill in the space of the 3D framework. The magnetic measurements revealed that the title compound exhibits a large magnetocaloric effect with the magnetic entropy change of -Δ = 42.2 J kg K at 2 K for 7 T, which is higher than that of the commercial material, GdGaO (GGG), with -Δ of 38.4 J kg K under the same conditions. Moreover, the infrared spectrum (IR), UV-vis-NIR diffuse reflectance spectrum, and thermal stability were investigated.
已通过高温溶液技术成功生长出 SrGd(BO) 单晶体，使用的助熔剂为 KO-KF-BO。该晶体属于空间群，参数分别为： = 22.3153(5) Å， = 15.9087(4) Å， = 8.7507(2) Å， = 2.04。SrGd(BO) 具有由 [GdO] 链构成的三维 (3D) 骨架，其中孤立的 [BO] 基团和 Sr 离子填充在 3D 骨架的空间中。磁测量结果表明，该标题化合物在 7 T 下的磁熵变达到 -Δ = 42.2 J kg K，在 2 K 时表现出较大的磁热效应，高于相同条件下商业材料 GdGaO (GGG) 的 -Δ = 38.4 J kg K。此外，还研究了红外光谱 (IR)、紫外可见近红外漫反射光谱和热稳定性。
