Strain Tuning the Kinetics of Topotactic Phase Transitions in Epitaxial Oxide Films
We report the kinetics of the topotactic brownmillerite–perovskite phase transition in epitaxial strontium cobaltite (SrCoOx) thin films. Our findings reveal asymmetric switching kinetics between the oxygen‐deficient SrCoO2.5 and oxygen‐rich SrCoO3 phases, driven by the epitaxial strain state. Using phase‐field modelin...