Hoppler, Justin Stahn, J. Bouyanfif, Houssny Malik, Vivek Kumar Patterson, B. D. Willmott, P. R. Cristiani, G. Habermeier, H.-U. Bernhard, Christian 2008-10-29 We investigated with synchrotron x-ray diffraction and reflectometry the formation of structural domains in the near-surface region of single crystalline SrTiO₃ (001) substrates with Y_0.6Pr_0.4Ba₂Cu₃O₇/La_2/3Ca_1/3MnO₃ superlattices grown on top. We find that the antiferrodistortive cubic to tetragonal transition, which occurs at <i>T</i>_STO=104  K in the bulk and at a considerably higher temperature of at least 120 K in the surface region of SrTiO₃, has only a weak influence on the domain formation. The strongest changes occur instead in the vicinity of the tetragonal to orthorhombic transition in SrTiO₃ around 65 K where pronounced surface facets develop that reach deep (at least several micrometers) into the SrTiO₃ substrate. These micrometer-sized facets are anisotropic and tilted with respect to one another by up to 0.5° along the shorter direction. Finally, we find that a third structural transition below 30 K gives rise to significant changes in the spread of the <i>c</i>-axis parameters. Overall, our data provide evidence for a strong mutual interaction between the structural properties of the SrTiO₃ surface and the multilayer grown on top. application/pdf https://folia.unifr.ch/global/documents/300777 https://folia.unifr.ch/documents/300777/files/bernhard_xrs.pdf eng info:eu-repo/semantics/altIdentifier/doi/10.1103/PhysRevB.78.134111 info:eu-repo/semantics/openAccess License undefined Physical Review B. - 2008, vol. 78, no. 13, p. 134111 barium compounds calcium compounds high-temperature superconductors lanthanum compounds multilayers praseodymium compounds reflectometry solid-state phase transformations superlattices X-ray diffraction yttrium compounds info:eu-repo/classification/udc/53 X-ray study of structural domains in the near-surface region of SrTiO₃ substrates with Y_0.6Pr_0.4Ba₂Cu₃O₇/La_2/3Ca_1/3MnO₃ superlattices grown on top http://purl.org/coar/resource_type/c_6501