Room‐Temperature Ba(Fe1−xCox)2As2 is not Tetragonal: Direct Observation of Magnetoelastic Interactions in Pnictide Superconductors. (23rd March 2015)

• Record Type: Journal Article
• Authors: Cantoni, Claudia; McGuire, Michael A.; Saparov, Bayrammurad; May, Andrew F.; Keiber, Trevor; Bridges, Frank; Sefat, Athena S.; Sales, Brian C.
• Is Part Of: Advanced materials. Volume 27:Number 17(2015)
• Page Start: 2715
• Page End: 2721
• Publication Date: 2015-03-23
• Subjects: Materials -- Periodicals; Chemical vapor deposition -- Periodicals; 620.11
• DOI: 10.1002/adma.201404079
• Languages: English
• ISSNs: 0935-9648

Abstract

<abstract abstract-type="graphical" xml:lang="en" id="adma201404079-abs-0001"> <title> <x xml:space="preserve">Abstract</x> </title> <p> <bold>Lattice distortions</bold> corresponding to Ba displacements with respect to the FeAs sublattice are revealed to break the room‐temperature tetragonal symmetry in Ba(Fe_{1−<italic>x</italic>}Co<italic>_x</italic>)₂As_2. 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. <graphic position="anchor" mimetype="image" xlink:href="ark:/27927/pgjkz032pr" orientation="portrait" xlink:type="simple" xmlns:xlink="http://www.w3.org/1999/xlink" /></p> </abstract>