Details

Autor(en) / Beteiligte

• Howard, Christopher J.
• Carpenter, Michael A.

Titel

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

Ist Teil von

• Acta crystallographica. Section B, Structural science, 2012-04, Vol.68 (2), p.209-212

Ort / Verlag

5 Abbey Square, Chester, Cheshire CH1 2HU, England: International Union of Crystallography

Erscheinungsjahr

2012

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• 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.