Giant Wrinkles on the Surface of Epitaxial BaTiO3 Thin Films with Drastic Shrinkage during Transfer from a MgO(100) Single-Crystal Substrate to a Flexible Polyethylene Terephthalate Sheet. - Hiroaki Nishikawa; Shinji Umatani; Tomofumi Mizuyama; Akihiro Hiraoka; Katsuhiro Mikami (Sensors, 2021)