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) Spatially-resolved EELS analysis of amorphous GB film in an SrTiO₃ ceramic: (a) STEM images; (b) ELNES separated spectrum of GB film (red) with both Ti–L_2,3 and O–K edges, together with those from grain (blue) and rutile reference (gray); (c) EELS profiling to generate chemical profiles from STEM intensities (LAADF/HAADF), elemental (Ti, O, Fe), ELNES signals for grain (blue) and film (red) of both the edges, and O:Ti ratio (gray) across this GB.