%0 Journal Article
%A Varela Del Arco, María
%A Sefrioui, Zouhair
%A Arias Serna, Diego
%A Navacerrada, M. A.
%A Lucía Mulas, María Luisa
%A López de la Torre, M. A.
%A León Yebra, Carlos
%A Loos, G. D.
%A Sánchez Quesada, Francisco
%A Santamaría Sánchez-Barriga, Jacobo
%T Intracell changes in epitaxially strained YBa_(2)Cu_(3)O_(7-x) ultrathin layers in YBa_(2)Cu_(3)O_(7-x)/PrBa_(2)Cu_(3)O_(7) superlattices
%D 1999
%@ 0031-9007
%U https://hdl.handle.net/20.500.14352/59654
%X The structure of high quality [YBCO_(N)/PBCO_(M)]_(1000 Å) superlattices, with N ranging between 1 and 12 unit cells and M = 5 unit cells, grown by high oxygen pressure sputtering, is analyzed. Intracell atomic structure of the layers along the c axis and disorder at interfaces is investigated using an x-ray refinement technique. Negligible roughness, step disorder, and interdiffusion are found at the interfaces. Epitaxial mismatch strain results in a surprising reorganization of interatomic distances for the thinnest YBCO layers, which seems to correlated with the decrease in the critical temperature. Intracell structure is invoked as an additional source of T_(c) changes in very thin YBCO layers.
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