Mesostructured SrTiO3/BaTiO3 Hybrid Films by Surfactant-Templated Sol-Gel Pathway with Robust Ferroelectricity
M. B. Zakaria1 of NIMS, Tsukuba, Japan, and his colleagues reported an unique method to make mesostructured SrTiO3/BaTiO3 Hybrid Films for stable higher dielectric capacitor application. At first, he made a mesostructured SrTiO3. Due to the missing volume of the SrTiO3, the substrate showed a concave structure. Then BaTiO3 goes into mesostructed SrTiO3 to form a mesostructured SrTiO3/BaTiO3 composite. Here a large number of strains can be created in the composite film, thereby leading to dramatic enhancement of ferroelectric property. Practically
mesostructured STO/BTO composite films showed the highest dielectric constant among all reported STO/BTO composites.