Yantao Cao, Huanpeng Bu, Zhendong Fu, Jinkui Zhao, Jason S. Gardner, Zhongwen Ouyang, Zhaoming Tian, Zhiwei Li, Hanjie Guo
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引用次数: 0
摘要
我们在此报告利用光学浮区技术成功合成了三角形沮合 PrMgAl11O19 的大型单晶体。单晶 X 射线衍射测量揭示了镜面内存在的淬火无序性，特别是 ∼7% 的 Pr 离子偏离了理想的 2d 位点，转向了 6h 位点。磁感应强度测量揭示了以 c 轴为易轴的伊辛各向异性。尽管自旋-自旋相互作用在 ∼10 K 和相当大的位点无序度以下会出现，但自旋在至少 50 mK 时不会有序或冻结。大型单晶体的出现为研究易轴不在平面上的三角形晶格上的奇异磁态提供了一个独特的机会。
Synthesis, disorder and Ising anisotropy in a new spin liquid candidate PrMgAl11O19
Here we report the successful synthesis of large single crystals of triangular frustrated PrMgAl11O19 using the optical floating zone technique. Single crystal Xray diffraction measurements unveiled the presence of quenched disorder within the mirror plane, specifically ∼7% of Pr ions deviating from the ideal 2d site towards the 6h site. Magnetic susceptibility measurements revealed an Ising anisotropy with the c-axis being the easy axis. Despite a large spin-spin interaction that develops below ∼10 K and considerable site disorder, the spins do not order or freeze down to at least 50 mK. The availability of large single crystals offers a distinct opportunity to investigate the exotic magnetic state on a triangular lattice with an easy axis out of the plane.
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