Fig. 1
From: Role of defects in determining the magnetic ground state of ytterbium titanate
The structure of defects in Yb2Ti2O7. a For oxygen-depleted Yb2Ti2O7−δ the oxygen vacancies (gold) are located on the O(2) sites (blue), and neighbouring Ti4+ (green) are replaced by charge compensating Ti3+ (purple) ions that are slightly displaced away from the vacancy. b For stuffed Yb2(Ti2−xYbx)O7−x/2 neighbouring Ti4+ ions are replaced by Yb3+ (red) ions that are displaced towards the O(2) vacancy. The diffuse neutron scattering measured at T ~ 30 K in the (hk7) plane in c for oxygen depleted and d for stuffed samples is compared with the simulated scattering in e and f, calculated using the models shown in a and b, respectively. The contour diagrams are on a hot scale with an arbitrary maximum
