Figure 1
From: Anisotropic resonance modes emerging in an antiferromagnetic superconducting state
Temperature dependence of elastic and inelastic response in Ba(Fe0.955 Co0.045)2 As2. (a) The elastic response is used to define the three transition temperatures. In particular the nuclear Bragg peak at (1,1,2) exhibits a sharp intensity increase at the structural phase transition, T S ∼ 65 K, while magnetic scattering at (0.5,0.5,3) and (0.5,0.5,5) appears at T N ∼ 55 K. The SC transition of our sample crystal was studied through the neutron depolarization on the (1,1,2) nuclear Bragg peak yielding a T C ∼ 14 K. The onset of superconductivity results in a suppression of the magnetic Bragg scattering at (0.5,0.5,3) as reported in21. Additionally, the persistence of anisotropic diffuse scattering in the spin-flip (SF) z- and y-channel in the nematic phase between T N and T S is displayed in the inset. Note, all the data has been normalized to their maximum values. (b) Below T C the SRM is formed, as it can be seen in an increase of χ″ at (0.5,0.5,1) and 5 meV.
