Magnetic field and pressure phase diagrams of the triangular-lattice antiferromagnet CsCuCl 3 explored via magnetic susceptibility measurements with a proximity-detector oscillator
Résumé
The effect of pressure (P) on magnetic susceptibility of CsCuCl3 was examined in magnetic fields (µ0H) of up to 51 T using a proximity detector oscillator (PDO), and the H-P phase diagram of CsCuCl3 was constructed over the saturation field (Hsat). We found that, with increasing P, Hsat increases and the uud-phase that appeared at P = 0.7 GPa widened. Based on comparison between the experimental and calculated H-P phase diagrams, the Y-phase was predicted to appear above 1.7 GPa. The interchain antiferromagnetic exchange interaction in the ab-plane was evaluated and found to increase with increasing P, which is consistent with a previous study under high pressure [D. Yamamoto et al., Nat. Commun. 12, 4263 (2021).]. Moreover, an anomaly was observed below P = 0.6 GPa just below Hsat and might be a new phase transition derived from nonlinear response caused by the PDO technique
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