High-pressure magnetization and NMR studies on $\alpha$-RuCl$_3$

Understand

We report high-pressure magnetization and $^{35}$Cl NMR studies on $\alpha$-RuCl$_3$ with pressure up to 1.5~GPa.

• At low pressures, the magnetic ordering is identified by both the magnetization data and the NMR data, where the $T_N$ shows a concave shape dependence with pressure.
• These data suggest stacking rearrangement along the $c$-axis.
• With increasing pressure, phase separation appears prominently at $P\ge$~0.45~GPa, and the magnetic volume fraction is completely suppressed at $P\ge$~1.05~GPa.