Structural chemistry and magnetic properties of the perovskite Sr3Fe2TeO
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Date
2016-06-29
Journal Title
Journal ISSN
Volume Title
Publisher
Elsevier
Abstract
A polycrystalline sample of perovskite-like Sr3Fe2TeO9 has been prepared in a solid-state reaction and studied by a combination of electron microscopy, Mössbauer spectroscopy, magnetometry, X-ray diffraction and neutron diffraction. The majority of the reaction product is shown to be a trigonal phase with a 2:1 ordered arrangement of Fe3+ and Te6+ cations. However, the sample is prone to nano-twinning and tetragonal domains with a different pattern of cation ordering exist within many crystallites. Antiferromagnetic ordering exists in the trigonal phase at 300 K and Sr3Fe2TeO9 is thus the first example of a perovskite with 2:1 trigonal cation ordering to show long-range magnetic order. At 300 K the antiferromagnetic phase coexists with two paramagnetic phases which show spin-glass behaviour below ~80 K. © 2016 The Authors. Published by Elsevier Inc. This is an open access article under the CC BY license
Description
Keywords
Perovskites, Microstructure, Trigonal lattices, Antiferromagnetic materials, Cations, X-ray diffraction, Neutron diffraction, Electron microscopy
Citation
Tang, Y., Hunter, E. C., Battle, P. D., Sena, R. P., Hadermann, J., Avdeev, M., & Cadogan, J. M. (2016) Structural chemistry and magnetic properties of the perovskite Sr3Fe2TeO9. Journal of Solid State Chemistry, 242(1), 86-95. doi:10.1016/j.jssc.2016.06.02.