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Composition and annealing effects on the linear electro‐optic response of solution‐deposited barium strontium titanate
Author(s) -
Edmondson Bryce I.,
Kwon Sunah,
Ortmann John E.,
Demkov Alexander A.,
Kim Moon J.,
Ekerdt John G.
Publication year - 2020
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/jace.17291
Subject(s) - crystallinity , annealing (glass) , materials science , thin film , strontium titanate , analytical chemistry (journal) , mineralogy , strontium , diffraction , nanotechnology , optics , chemistry , composite material , physics , organic chemistry , chromatography
Chemical solution deposition was used to deposit epitaxial Ba x Sr (1− x ) TiO 3 thin films on SrTiO 3 template layers on Si(001) for x = 1.0, 0.7, 0.5, 0.3, and 0.0. Effective Pockels coefficients were determined as a function of film composition both for as‐deposited films (crystallized at 600°C) and for the films after annealing at 750°C for 10 hours. Pockels response decreased monotonically with decreasing Ba content and coefficients were higher for annealed films, reaching 89 ± 3 pm/V for annealed BaTiO 3 . These results are contextualized with the aid of X‐ray diffraction and high‐resolution transmission microscopy, which illuminated the crystallinity and defect nature of the films.