Chemical structure of grain-boundary layer in SrTiO<sub>3</sub> and its segregation-induced transition: A continuum interface approach

Chemical structure of grain-boundary layer in SrTiO₃ and its segregation-induced transition: A continuum interface approach

Gu Hui^†

(color online) ELNES-separation into signals from GB layer (red) and from the lattice grain (blue) for Σ5 (310)/[001] GB in undoped SrTiO₃ bicrystal for: (a) Ti–L_2,3 and (b) O–K edges; (c) elemental and (d) ELNES profiles of Ti–L_2,3 (above) and O–K (below) signals. Each pair of ELNES profiles could be normalized successively to gain GB concentrations of ∼90% of grains and chemical width of 0.8 nm (e); refer to text for more details.