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 measurements unveiled the presence of quenched disorder within the mirror plane, specifically ∼7\% of Pr ions deviating from the ideal 2\textit{d} site towards the 6\textit{h} site. Magnetic susceptibility measurements revealed an Ising anisotropy with the \textit{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.
@article{arxiv.2405.08457,
title = {Synthesis, disorder and Ising anisotropy in a new spin liquid candidate PrMgAl$_{11}$O$_{19}$},
author = {Yantao Cao and Huanpeng Bu and Zhendong Fu and Jinkui Zhao and Jason S. Gardner and Zhongwen Ouyang and Zhaoming Tian and Zhiwei Li and Hanjie Guo},
journal= {arXiv preprint arXiv:2405.08457},
year = {2024}
}