The growth mechanism of epitaxial BaTiO3 films on vicinal Nb-doped SrTiO3 (srTiO(3):Nb) (001) substrate surfaces was studied in terms of surface morphology, crystalline orientation, microstructure, and film/substrate interface. Well-oriented BaTiO3 thin films were grown on SrTiO3 substrates with well-defined terraces by pulsed laser deposition. The regularly terraced TiO2-terminated surfaces of vicinal SrTiO3:Nb (001) substrates were prepared by a definite chemical and thermal treatment. Under our conditions, BaTiO3 seems to grow with a layer-then-island (Stranski-Krastanov) growth mechanism. In order to investigate the orientation and crystallinity of the BaTiO3 films, x-ray diffraction and high-resolution transmission election microscopy were performed. Ferroelectricity of the BaTiO3 films was proved by electrical measurements performed on Pt/BaTiO3/SrTiO3:Nb heterostructures.
|Title of host publication||FERROELECTRIC THIN FILMS X|
|Subtitle of host publication||Book Series: MATERIALS RESEARCH SOCIETY SYMPOSIUM PROCEEDINGS|
|Publication status||Published - 2002|
|Name||MATERIALS RESEARCH SOCIETY SYMPOSIUM PROCEEDINGS|
|Publisher||FERROELECTRIC THIN FILMS X|
Visinoiu, A., Alexe, M., Lee, H. N., Zakharov, D. N., Pignolet, A., Hesse, D., & Gosele, U. (2002). Initial growth stages of epitaxial BaTiO3 films on vicinal SrTiO3 : Nb (001) substrates. In FERROELECTRIC THIN FILMS X: Book Series: MATERIALS RESEARCH SOCIETY SYMPOSIUM PROCEEDINGS (Vol. 688, pp. 285). (MATERIALS RESEARCH SOCIETY SYMPOSIUM PROCEEDINGS; Vol. 688).