具有磁热效应的富钆硼酸盐Gd(BO)(BO)O
Gadolinium-Rich Borate Gd(BO)(BO)O Exhibiting a Magnetocaloric Effect.
作者信息
Song Huimin, Wang Naizheng, Liu Wang, Feng Jingcheng, Shen Jun, Dai Wei, Lin Zheshuai, Yao Jiyong, Zhang Guochun
机构信息
Beijing 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.
出版信息
Inorg Chem. 2020 Aug 3;59(15):11071-11078. doi: 10.1021/acs.inorgchem.0c01547. Epub 2020 Jul 10.
A gadolinium-rich borate Gd(BO)(BO)O was successfully grown by the high-temperature solution method using the RbO-BO flux. The crystal crystallizes in centrosymmetric space group 2/ with lattice constants = 18.4300(2) Å, = 3.7400(4) Å, = 14.2047(16) Å, and β = 119.8550(12)°. Two different honeycomb-like [GdO] layers alternately arrange in the order ABAB forming the three-dimensional framework, in which the isolated [BO] and [BO] units fill in channels of the 12-membered and 10-membered [GdO] polyhedral rings, respectively. The UV cutoff edge of Gd(BO)(BO)O is less than 240 nm. The maximum -Δ is 26.53 J kg K or 174.70 mJ cm K ( = 4.4 K and Δ = 7 T) as investigated by the isothermal magnetization method.
采用RbO-BO助熔剂通过高温溶液法成功生长出富钆硼酸盐Gd(BO)(BO)O。该晶体属于中心对称空间群2/，晶格常数a = 18.4300(2) Å，b = 3.7400(4) Å，c = 14.2047(16) Å，β = 119.8550(12)°。两种不同的蜂窝状[GdO]层以ABAB顺序交替排列形成三维骨架，其中孤立的[BO]和[BO]单元分别填充在12元[GdO]多面体环和10元[GdO]多面体环的通道中。Gd(BO)(BO)O的紫外截止边小于240 nm。通过等温磁化法研究，最大-Δ为26.53 J kg K或174.70 mJ cm K（T = 4.4 K，Δ = 7 T）。
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