SciPost Phys. Proc. 11, 012 (2023) ·
published 5 June 2023
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Magnetization measurements of the triangular lattice antiferromagnet CsFeCl$_{3}$ at 1.4 K for $H \parallel c$ were performed in pulsed high magnetic fields of up to 51 T under high pressures of up to 0.80 GPa. At ambient pressure, the magnetization below $H_{\rm c1}$ = 4 T is small, and then it changes steeply between $H_{\rm c1}$ and $H_{\rm c2}$ = 12 T, followed by a gradual increase in magnetization up to $H_{\rm m}$ = 33 T where a two-step metamagnetic transition occurs. With increasing pressure, the $H_{\rm c1}$ and $H_{\rm m}$ shifted to the low-field side, while the $H_{\rm c2}$ shifted to the opposite side. The change in $H_{\rm m}$ may depend on the difference in the single-ion anisotropies on pressure in the lowest $J$ = 1 and the excited $J$ = 2 states.
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