作者: D.D. Fong , C. Thompson , S.K. Streiffer , J.A. Eastman , O. Auciello
关键词: Thin film 、 Optics 、 Curie temperature 、 Ferroelectricity 、 Chemical vapor deposition 、 Materials science 、 Scattering 、 Phase (matter) 、 Condensed matter physics 、 Epitaxy 、 Synchrotron
摘要: We have used in situ synchrotron x-ray scattering to investigate PbTiO3 films grown epitaxially on SrTiO3 (001) substrates. When the are cooled below a thickness-dependent Curie temperature, ferroelectric phase forms as 180° stripe domains with well-defined period. With further cooling, period changes fairly abruptly from lower higher value, suggesting transition between two domain phases. The periods of both phases observed depend square root film thickness, agreement theory.