Mixed Magnetic Ordering: Magnetic Susceptibility and Mouml;ssbauer Studies on Iron(III) Tellurate (Fe2TeO6)

摘要

The susceptibility curve of Fe2TeO6exhibits two peaks, a sharp one at 201deg;K and a broad one at 233deg;K. Mouml;ssbauer measurements have established the onset of longhyphen;range order at 201deg;K. The broad peak is thought to be due to some form of shorthyphen;range ordering and two models which might be referred to as layering and pairing are considered as possible explanations. These results are also compared with the evidence of neutronhyphen;diffraction experiments. The correlation of these various experiments shows that iron tellurate provides an example of a material with magnetically distinguishable shorthyphen;range and longhyphen;range order. Some aspects of this ordering have been compared with ldquo;intramolecular antiferromagnetism,rdquo; otherwise known as ldquo;isolated clusteringrdquo; in polymeric coordination compounds.