Synthesis, disorder and Ising anisotropy in a new spin liquid candidate PrMgAl<sub>11</sub>O<sub>19</sub>

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Yantao Cao; Huanpeng Bu; Zhendong Fu; Jinkui Zhao; Jason S Gardner; Zhongwen Ouyang; Zhaoming Tian; Zhiwei Li; Hanjie Guo

doi:10.1088/2752-5724/ad4a93

Yantao Cao, Huanpeng Bu, Zhendong Fu, Jinkui Zhao, Jason S Gardner, Zhongwen Ouyang, Zhaoming Tian, Zhiwei Li, Hanjie Guo. Synthesis, disorder and Ising anisotropy in a new spin liquid candidate PrMgAl11O19[J]. Materials Futures, 2024, 3(3): 035201. DOI: 10.1088/2752-5724/ad4a93

Citation:

Synthesis, disorder and Ising anisotropy in a new spin liquid candidate PrMgAl₁₁O₁₉

Graphical Abstract

Graphical Abstract

Abstract

Abstract

Here we report the successful synthesis of large single crystals of triangular frustrated PrMgAl₁₁O₁₉ using the optical floating zone technique. Single crystal x-ray diffraction (XRD) 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.