Yu Zhenwei, Liang Hui, Wang Yiyan, Li Na, Sun Yan, Wu Dandan, Zhou Ying, Ding Zongling, Sun Jin, He Tianbo, Wu Ziyang, Wang Junfeng, Sun Xuefeng, Li Qiuju
School of Materials Science and Engineering, Anhui University, Hefei 230601, People's Republic of China.
Anhui Key Laboratory of Magnetic Functional Materials and Devices, Institutes of Physical Science and Information Technology, Anhui University, Hefei 230601, People's Republic of China.
J Phys Condens Matter. 2024 Sep 6;36(49). doi: 10.1088/1361-648X/ad7434.
We report the synthesis, crystal structure, magnetization and specific heat studies of YCo(OH)Brsingle crystal. YCo(OH)Brcrystallizes in trigonal structure, in which Coions form a perfect kagomé lattice. The magnetic susceptibility reveals successive magnetic transitions at 6.5 and 7.8 K and the Curie-Weiss fitting demonstrates that YCo(OH)Brhas strong antiferromagnetic coupling and pronounced magnetic frustration effect. Specific heat data suggest that low-magnetic transitions are attributed to antiferromagnetic ordering of Coions and the magnetic entropy points to effective 1/2 spin in the system. These results indicate that an unusual magnetic ordering state with effective spin-1/2 is realized in kagomé lattice system YCo(OH)Br.
我们报道了YCo(OH)Br单晶的合成、晶体结构、磁化强度和比热研究。YCo(OH)Br以三角结构结晶，其中Co离子形成完美的 kagomé 晶格。磁化率显示在6.5 K和7.8 K处有连续的磁转变，居里 - 外斯拟合表明YCo(OH)Br具有强反铁磁耦合和明显的磁阻挫效应。比热数据表明低磁转变归因于Co离子的反铁磁有序，磁熵表明系统中存在有效1/2自旋。这些结果表明在kagomé晶格体系YCo(OH)Br中实现了具有有效自旋1/2的异常磁有序状态。
