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