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ACS Nano. 2011 Jun 28;5(6):4783-9. doi: 10.1021/nn2007628. Epub 2011 May 27.

Strain-driven oxygen deficiency in self-assembled, nanostructured, composite oxide films.

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Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-6116, Unites States.


Oxide self-assembly is a promising bottom-up approach for fabricating new composite materials at the nanometer length scale. Tailoring the properties of such systems for a wide range of electronic applications depends on the fundamental understanding of the interfaces between the constituent phases. We show that the nanoscale strain modulation in self-assembled systems made of high-T(c) superconducting films containing nanocolumns of BaZrO(3) strongly affects the oxygen composition of the superconductor. Our findings explain the observed reduction of the superconducting critical temperature.


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