ROOM-TEMPERATURE BA(FE1-X COX)2 AS2 IS NOT TETRAGONAL: DIRECT OBSERVATION OF MAGNETOELASTIC INTERACTIONS IN PNICTIDE SUPERCONDUCTORS.
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.
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.
Contributors: Claudia Cantoni, Michael A McGuire, Bayrammurad Saparov, Andrew F May, Trevor Keiber, Frank Bridges, Athena S Sefat, Brian C Sales