Symmetry analysis of the structural and magnetic phase transitions in 122 iron arsenides

Howard, Christopher J. and Carpenter, Michael A. (2012) Symmetry analysis of the structural and magnetic phase transitions in 122 iron arsenides. Acta Crystallographica Section B Structural Science, 68 (2). pp. 209-212. DOI 10.1107/S0108768112008294

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Abstract

It is evident from the literature that the 122 iron arsenides, XFe2As2 with X = Ca, Sr, Ba or Eu, undergo one or more phase transitions from a higher-temperature paramagnetic tetragonal structure in grey group I4/mmm1' to an antiferromagnetic structure with magnetic space group CAmca. Symmetry analysis is used to enumerate the possibilities for the transition (or transitions) between the higher- and lower-symmetry structures, and the results are used as a basis for comment on published experimental results.

Item Type: Article
Uncontrolled Keywords: 2012AREP; IA63;
Subjects: 03 - Mineral Sciences
Divisions: 03 - Mineral Sciences
Journal or Publication Title: Acta Crystallographica Section B Structural Science
Volume: 68
Page Range: pp. 209-212
Identification Number: 10.1107/S0108768112008294
Depositing User: Sarah Humbert
Date Deposited: 18 Apr 2012 14:42
Last Modified: 23 Jul 2013 10:04
URI: http://eprints.esc.cam.ac.uk/id/eprint/2461

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