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25 April 2024

» arxiv » cond-mat/0104287

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Field-Induced Two-Step Phase Transitions in the Singlet Ground State Triangular Antiferromagnet CsFeBr$_3$
Y. Tanaka ; H. Tanaka ; T. Ono ; A. Oosawa ; K. Morishita ; K. Iio ; T. Kato ; H. Aruga Katori ; M. Bartashevich ; T. Goto ;
Date:	17 Apr 2001
Subject:	Strongly Correlated Electrons \| cond-mat.str-el
Abstract:	The ground state of the stacked triangular antiferromagnet CsFeBr$_3$ is a spin singlet due to the large single ion anisotropy $D(S^z)^2$. The field-induced magnetic ordering in this compound was investigated by the magnetic susceptibility, the magnetization process and specific heat measurements for an external field parallel to the $c$-axis. Unexpectedly, two phase transitions were observed in the magnetic field $H$ higher than 3 T. The phase diagram for temperature versus magnetic field was obtained. The mechanism leading to the successive phase transitions is discussed.
Source:	arXiv, cond-mat/0104287
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