Mmp. Deazevedo et al., TRANSIENT SPIN STRUCTURES AT THE ANTIFERRO-TO-PARAMAGNETIC PHASE-BOUNDARY OF FEBR2, Journal of magnetism and magnetic materials, 140, 1995, pp. 1557-1558
Excess magnetization and anomalous susceptibility loss is observed on
antiferromagnetic FeBr2, in an axial field H below and above its H-T-p
hase boundary between the multicritical temperature (T-m, = 4.6 K) and
the Neel temperature (T-c = 14.1 K). These and other unusual properti
es of FeBr2 are attributed to frustration-induced intraplanar non-crit
ical spin fluctuations, which can be simulated within the framework of
a triaxial version of the 2D-ANNNI model.