Figure 4: Evolution of the average Cu/Fe chemical disorder with the cooling rate.
From: Tuning magnetic spirals beyond room temperature with chemical disorder
(a,b) Fe–O and Cu–O interatomic distances at room temperature (RT). (c–d) Cu/Fe occupation of the split B-sites in the pyramids, as obtained from the combined neutron and X-ray synchrotron Rietveld fits at RT. (e) Anisotropic mean-square displacements (MSD’s) of all atomic sites at 10 K. (f) Thermal ellipsoids (90% probability) at RT. Dashed lines are guides for the eye. The error bars of the interatomic distances, the Cu/Fe occupation and the MSD’s are the standard deviations obtained from the fits of the crystal structure using the FullProf Suite Rietveld package42,43.
