%0 Journal Article
%A Ramamoorthy Ramesh
%A D Hwang
%A T.S Ravi
%A A Inam
%A J.B Barner
%A L Nazar
%A S.W Chan
%A C.Y Chen
%A B Dutta
%A T Venkatesan
%A X.D Wu
%B Applied Physics Letters
%D 1990
%G eng
%P 2243-2245
%R 10.1063/1.102932
%T Epitaxy of Y-Ba-Cu-O thin films grown on single-crystal MgO
%V 56
%X The epitaxy of a thin-film Y-Ba-Cu-O (YBCO) superconductor deposited on a single-crystal [001] MgO substrate was examined by transmission electron microscopy. The large lattice mismatch (8-10%) in the basal plane of YBCO and MgO is accommodated mainly by the formation of a polycrystalline, mosaic structure. The grain boundaries correspond to unique crystallographic interfaces, determined by the crystal symmetry of the substrate and the thin film.