Research Papers in Physics and Astronomy


Date of this Version

August 2000


Published in the Journal of Magnetism and Magnetic Materials. Available online August 14, 2000. Published February 1995, pages 1557-1558.


Excess magnetization and anomalous susceptibility loss is observed on antiferromagnetic FeBr2 in an axial field H below and above its H-T-phase boundary between the multicritical temperature (Tm = 4.6 K) and the Néel temperature (TN = 14.1 K). These and other unusual properties of FeBr2 are attributed to frustration-induced intraplanar non-critical spin fluctuations, which can be simulated within the framework of a triaxial version of the 2D-ANNNI model.

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