Journal
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN
Volume 70, Issue 10, Pages 3068-3075Publisher
PHYSICAL SOC JAPAN
DOI: 10.1143/JPSJ.70.3068
Keywords
CsFeBr3; triangular antiferromagnet; singlet ground state; field-induced magnetic ordering; successive phase transitions; single ion anisotropy; magnetic susceptibility; magnetization process; specific heat
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The ground state of the stacked triangular antiferromagnet CsFeBr3 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 vs. magnetic field vas obtained. The mechanism leading to the successive phase transitions is discussed.
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