Influence of the vicinal surface on the anisotropic dielectric properties of highly epitaxial Ba0.7Sr0.3TiO3thin films

• DOI: 10.1039/c6nr09044c
• Publication Date: 2017-01-23T07:23:31Z
• Authors: Guang Yao; Yanda Ji; Weizheng Liang; Min Gao; Shengliang Zheng; You Wang; Handong Li; Zhiming Wang; Chonglin Chen; Yuan Lin
• Keywords: Vicinal; Terrace (agriculture)

Epitaxial thin films of Ba0.7Sr0.3TiO3 (BST) were grown on the designed vicinal single-crystal LaAlO3 (001) substrates to systematically investigate evolution microstructures and in-plane dielectric properties as-grown under strains induced by surface step terraces. Anisotropic observed, which can be attributed different tetragonalities with miscut orientations along [100] [110] directions angles 1.0°, 2.75° 5.0°. A terrace geometric model both compressive tensile strained domains in BST film was established, is good agreement experimental results. Our studies not only shed new light heteroepitaxial growth mechanism, but also provide a promising platform for design integration high performance device applications.