Field-induced two-step phase transitions in the singlet ground state triangular antiferromagnet CsFeBr3

Authors
Tanaka, Y Tanaka, H Ono, T Oosawa, A Morishita, K Iio, K Kato, T Katori, HA Bartashevich, MI Goto, T
Citation
Y. Tanaka et al., Field-induced two-step phase transitions in the singlet ground state triangular antiferromagnet CsFeBr3, J PHYS JPN, 70(10), 2001, pp. 3068-3075
Citations number
44
Categorie Soggetti
Physics
Journal title
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN
ISSN journal
00319015 → ACNP
Volume
70
Issue
10
Year of publication
2001
Pages
3068 - 3075
Database
ISI
SICI code
0031-9015(200110)70:10<3068:FTPTIT>2.0.ZU;2-A
Abstract
The ground state of the stacked triangular antiferromagnet CsFeBr3 is a spi n singlet due to the large single ion anisotropy D(S-z)(2). The field-induc ed magnetic ordering in this compound was investigated by the magnetic susc eptibility, the magnetization process and specific heat measurements for an external field parallel to the c-axis. Unexpectedly, two phase, transition s 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 t he successive phase transitions is discussed.