Abstract

Magnetization measurements of the triangular lattice antiferromagnet CsFeCl_{3}3 at 1.4 K for H \parallel cH∥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_{c1}Hc1 = 4 T is small, and then it changes steeply between H_{c1}Hc1 and H_{c2}Hc2 = 12 T, followed by a gradual increase in magnetization up to H_{m}Hm = 33 T where a two-step metamagnetic transition occurs. With increasing pressure, the H_{c1}Hc1 and H_{m}Hm shifted to the low-field side, while the H_{c2}Hc2 shifted to the opposite side. The change in H_{m}Hm may depend on the difference in the single-ion anisotropies on pressure in the lowest JJ = 1 and the excited J=2J=2 states.

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