Room-Temperature Ba(Fe1-x Cox)2 As2 is not Tetragonal: Direct Observation of Magnetoelastic Interactions in Pnictide Superconductors.

Cantoni, Claudia; McGuire, Michael A; Saparov, Bayrammurad; May, Andrew F; Keiber, Trevor; Bridges, Frank; Sefat, Athena S; Sales, Brian C · Adv Mater · 2015

basic_science · Level V

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Record sourced from PubMed, PMID 25809406.
Also identified by DOI 10.1002/adma.201404079.
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Abstract

Lattice distortions corresponding to Ba displacements with respect to the FeAs sublattice are revealed to break the room-temperature tetragonal symmetry in Ba(Fe1-x Cox)2 As2. The displacements yield twin domains of the size of ≈10 nm. The domain size correlates with the magnitude of the local Fe magnetic moment and its non-monotonic dependence on Co concentration.

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