Intracell Changes in Epitaxially StrainedYBa2Cu3O7−x | Zendy

M. Varela | Zendy; Z. Sefrioui | Zendy; D. Arias | Zendy; María de los Ángeles Navacerrada Saturio | Zendy; M. L. Lucı́a | Zendy; M. A. López de la Torre | Zendy; C. León | Zendy; G. Loos | Zendy; F. Sánchez-Quesada | Zendy; J. Santamarı́a | Zendy

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Intracell Changes in Epitaxially StrainedYBa2Cu3O7−x

Author(s) -

M. Varela,

Z. Sefrioui,

D. Arias,

María de los Ángeles Navacerrada Saturio,

M. L. Lucı́a,

M. A. López de la Torre,

C. León,

G. Loos,

F. Sánchez-Quesada,

J. Santamarı́a

Publication year - 1999

Publication title -

physical review letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 3.688

H-Index - 673

eISSN - 1079-7114

pISSN - 0031-9007

DOI - 10.1103/physrevlett.83.3936

Subject(s) - epitaxy , materials science , crystallography , condensed matter physics , unit (ring theory) , physics , nanotechnology , layer (electronics) , chemistry , mathematics education , mathematics

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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