Susceptibility of non-crystalline ferromagnetic FeF2
Open Access
- 1 January 1975
- journal article
- Published by EDP Sciences in Journal de Physique Lettres
- Vol. 36 (7-8) , 197-199
- https://doi.org/10.1051/jphyslet:01975003607-8019700
Abstract
In the temperature range 150 K > T > 25 K the magnetic susceptibility of non-crystalline FeF2 can be described by a Curie-Weiss law. A paramagnetic Curie temperature of θ = (22 ± 1) K and an effective moment of peff = (5.2 ± 0.1) μB are found. Temperature and field dependence of the magnetization between 15 K-20.5 K indicate superparamagnetic behaviour. At lower temperatures the magnetization shows hysteresis and a slightly time dependent remanence. The observation of moments which approach 4 μ B/Fe2+ implies that the ordered state is ferromagneticKeywords
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- Superexchange interaction and symmetry properties of electron orbitalsJournal of Physics and Chemistry of Solids, 1959