title: Room-Temperature Ba(Fe1-x Cox)2 As2 is not Tetragonal: Direct Observation of Magnetoelastic Interactions in Pnictide Superconductors.
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.
authors: Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA.
authors: Claudia
authors: C
authors: Cantoni
authors: Michael A
authors: MA
authors: McGuire
authors: Bayrammurad
authors: B
authors: Saparov
authors: Andrew F
authors: AF
authors: May
authors: Trevor
authors: T
authors: Keiber
authors: Frank
authors: F
authors: Bridges
authors: Athena S
authors: AS
authors: Sefat
authors: Brian C
authors: BC
authors: Sales
keywords: iron-based superconductors; lattice distortions; local magnetic moment; scanning transmission electron microscopy