Oxygen vacancy-induced structural evolution of SrFeO${}_{3-x}$ epitaxial thin film from brownmillerite to perovskite

Seulki Roh, Seokbae Lee, Myounghoon Lee +8

We investigated SrFeO${}_{3-x}$ thin films on a SrTiO${}_3$ (001) substrate prepared via pulsed laser epitaxy using an optical spectroscopy technique. The oxygen vacancy level ($x$) wa…