Metamagnetic domains and dynamic fluctuations in FeBr₂

Authors

O. Petracic, Laboratorium fu¨r Angewandte Physik, Gerhard-Mercator-Universita¨t Duisburg, D-47048 Duisburg,
Christian Binek, University of Nebraska-LincolnFollow
Wolfgang Kleeman, Laboratorium fu¨r Angewandte Physik, Gerhard-Mercator-Universita¨t Duisburg, D-47048 Duisburg,Follow

Date of this Version

4-15-1997

Comments

Published by American Institute of Physics. Copyright 1997. Permission to use. J. Appl. Phys. 81, 4145 (1997). http://www.jap.aip.org.

Abstract

The mixed phase and the regime of non-critical fluctuations of the magnetic phase diagram of FeBr₂ is investigated by SQUID susceptometry and light diffraction techniques. The experiments seem to evidence instability of the tricritical point as conjectured recently. The observation of stripe domains and light diffraction below and above T_m = 4.6 K and the virtual continuation of the phase transition line to above T_m are in agreement with the occurrence of a critical endpoint at T_m and of a bicritical endpoint at T > T_m. ©1997 American Institute of Physics.