Mode Crystallography Analysis through the Structural Phase Transition and Magnetic Critical Behavior of the Lacunar Spinel GaMoSe.

In the lacunar spinels, with the formula ABX, transition-metal ions form tightly bound B clusters resulting in exotic physical properties such as the stabilization of Néel-type skyrmion lattices, which hold great promise for energy-efficient switching devices. These properties are governed by the symmetry of these compounds with distortion of the parent noncentrosymmetric 4̅3 space group to the polar 3, with recent observation of a coexisting 2 low-temperature phase. In this study, through powder neutron diffraction, we further confirm that a metastable 2 coexists with the 3 phase in GaMoSe and we present its structure.