S = 1/2 卡戈梅反铁磁体 YCo3(OH)6.55Br2.45 的低温磁性能。

IF 2.3 4区物理与天体物理 Q3 PHYSICS, CONDENSED MATTER Journal of Physics: Condensed Matter Pub Date : 2024-09-06 DOI:10.1088/1361-648X/ad7434

Zhenwei Yu, Hui Liang, Yiyan Wang, Na Li, Yan Sun, Dandan Wu, Ying Zhou, Zongling Ding, Jin Sun, Tianbo He, Ziyang Wu, Junfeng Wang, Xuefeng Sun, Qiuju Li

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引用次数: 0

摘要

我们报告了 YCo3(OH)6.55Br2.45 单晶的合成、晶体结构、磁化和比热测量结果，其中 Co2+ 离子占据一个卡戈美晶格。YCo3(OH)6.55Br2.45晶体呈三方结构，形成完美的卡戈美晶格。磁感应强度显示了在 6.5 和 7.8 K 时的连续磁跃迁，居里-韦斯拟合结果表明 YCo3(OH)6.55Br2.45 具有很强的反铁磁耦合和明显的磁挫折效应。比热数据表明，低 T 磁跃迁归因于 Co2+ 离子的反铁磁有序化，而磁熵则表明体系中存在有效的 1/2 自旋。这些结果表明，在卡戈美晶格体系 YCo3(OH)6.55Br2.45中实现了具有有效自旋-1/2的不寻常磁有序态。

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Low-temperature magnetic properties of theS= 1/2 kagomé antiferromagnet YCo₃(OH)_6.55Br_2.45.

We report the synthesis, crystal structure, magnetization and specific heat studies of YCo₃(OH)_6.55Br_2.45single crystal. YCo₃(OH)_6.55Br_2.45crystallizes in trigonal structure, in which Co²⁺ions 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 YCo₃(OH)_6.55Br_2.45has strong antiferromagnetic coupling and pronounced magnetic frustration effect. Specific heat data suggest that low-Tmagnetic transitions are attributed to antiferromagnetic ordering of Co²⁺ions 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 YCo₃(OH)_6.55Br_2.45.

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来源期刊

Journal of Physics: Condensed Matter 物理-物理：凝聚态物理

CiteScore

5.30

自引率

7.40%

发文量

1288

审稿时长

2.1 months

期刊介绍： Journal of Physics: Condensed Matter covers the whole of condensed matter physics including soft condensed matter and nanostructures. Papers may report experimental, theoretical and simulation studies. Note that papers must contain fundamental condensed matter science: papers reporting methods of materials preparation or properties of materials without novel condensed matter content will not be accepted.