Long-range spontaneous structural ordering in barium stannate thin films

Takahashi, R.; Valset, K.; Folven, E.; Eberg, E.; Grepstad, J. K.; Tybell, T.
August 2010
Applied Physics Letters;8/23/2010, Vol. 97 Issue 8, p081906
Academic Journal
We have studied spontaneous structural ordering in epitaxial barium stannate thin films, grown on SrTiO3(001) substrates by pulsed laser deposition. X-ray diffraction analysis revealed satellite reflections around the Bragg peaks, indicative of nanoscale periodic ordering in the out-of-plane direction. We find that mass transport strongly affects this spontaneous ordering, and that the thin film growth rate can be used to tune the periodicity of the superlattices, here between 4.3 and 57.7 nm.


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