We observe that the high-temperature δ-phase of Bi2 O 3 is stabilized to room temperature by the epitaxial growth of nanostructures onto either (001)-oriented SrTiO3 or (001)p -oriented DyScO3 single crystal substrates. In addition, the morphology can be controlled by the miscut of the substrate. Synchrotron x-ray scattering observations at controlled temperatures and oxygen partial pressures reveal that the δ -Bi2 O3 nanostructures are coherently strained to the substrates at room temperature. Annealing the nanostructures at 600 °C causes gradual conversion of the (001)-oriented δ -phase to an unidentified strain-relaxed phase.
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)