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

被引：10

作者：

Howard, Christopher J. ^{[1
]}

Carpenter, Michael A. ^{[2
]}

机构：

[1] Univ Newcastle, Sch Engn, Callaghan, NSW 2308, Australia

[2] Univ Cambridge, Dept Earth Sci, Cambridge CB2 3EQ, England

来源：

ACTA CRYSTALLOGRAPHICA SECTION B-STRUCTURAL SCIENCE | 2012年 / 68卷

关键词：

iron arsenides; magnetic structure; phase transitions; group theory;

D O I：

10.1107/S0108768112008294

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

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.

引用

页码：209 / 212

页数：4

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