氰尿酸盐（CNO）（OH）（ = 钆 - 镥）的合成、结构及磁性能：低温磁热候选物钆（CNO）（OH）
Synthesis, Structure, and Magnetic Properties of Cyanurates (CNO)(OH) ( = Gd-Lu): Cryogenic Magnetocaloric Candidate Gd(CNO)(OH).
作者信息
Wang Tianyu, Guo Ruixin, Liu Qingxiong, Wu Qian, Meng Xianghe, Zhou Zhengyang, Guo Shu, Xia Mingjun
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, China.
School of Future Technology, University of Chinese Academy of Sciences, Beijing 100049, China.
出版信息
Inorg Chem. 2024 Jul 22;63(29):13171-13175. doi: 10.1021/acs.inorgchem.4c01569. Epub 2024 Jul 10.
Rare-earth ()-based frustrated magnets are fertile playgrounds for discovering exotic quantum phenomena and exploring adiabatic demagnetization refrigeration applications. Here, we report the synthesis, structure, and magnetic properties of a family of rare-earth cyanurates (CNO)(OH) ( = Gd-Lu) with an acentric space group 6̅2. Magnetic susceptibility χ() and isothermal magnetization () measurements manifest that (CNO)(OH) ( = Gd, Dy-Yb) compounds exhibit no magnetic ordering down to 2 K, while Tb(CNO)(OH) shows long-range magnetic ordering around 3.6 K. Among them, magnetically frustrated spin-/ Gd(CNO)(OH) shows long-range magnetic ordering around 1.25 K and a large magnetocaloric effect with a maximum magnetic entropy change Δ of up to 58.1 J kg K at Δ = 7 T at liquid-helium temperature regimes.
基于稀土（）的受挫磁体是发现奇异量子现象和探索绝热去磁制冷应用的肥沃领域。在此，我们报道了一族具有非中心对称空间群6̅2的稀土氰尿酸盐（CNO）(OH)（= Gd-Lu）的合成、结构和磁性。磁化率χ()和等温磁化强度()测量表明，（CNO）(OH)（= Gd，Dy-Yb）化合物在2 K以下没有磁有序，而Tb(CNO)(OH)在约3.6 K时表现出长程磁有序。其中，磁受挫的自旋/ Gd(CNO)(OH)在约1.25 K时表现出长程磁有序，并且在液氦温度范围内，在Δ = 7 T时具有高达58.1 J kg K的最大磁熵变Δ的大磁热效应。
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