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Science 28 September 1990:
Vol. 249. no. 4976, pp. 1549 - 1552
DOI: 10.1126/science.249.4976.1549
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Articles

Epitaxial and Smooth Films of a-Axis YBa2Cu3O7

C. B. Eom 1, A. F. Marshall 2, S. S. Laderman 3, R. D. Jacowitz 3, and T. H. Geballe 4

1 Department of Applied Physics, Stanford University, Stanford, CA 94305, Center for Materials Research, Stanford University, Stanford, CA 94305
2 Center for Materials Research, Stanford University, Stanford, CA 94305
3 Hewlett-Packard, Palo Alto, CA 94304
4 Department of Applied Physics, Stanford University, Stanford, CA 94305

YBa2Cu3O7 films have been grown epitaxially on SrTiO3 (100) and LaAlO3 (100) substrates with nearly pure a-axis orientation and with transition temperature Tc (R = 0) of 85 K. A unique feature of these films is their smooth surface. These smooth surfaces enable the growth of short-period superlattices with well-defined modulations. The films are untwinned and the grains grow with their c-axis along one of two perpendicular directions on the substrate ([100] or [010]). The fabrication of sandwich-type Josephson junctions with good characteristics may now be possible because unlike c-axis—oriented films, the superconducting coherence length of these smooth films is appreciably large perpendicular to their surfaces.


THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
Ferroelectric Bi3.25La0.75Ti3O12 Films of Uniform a-Axis Orientation on Silicon Substrates.
H. N. Lee, D. Hesse, N. Zakharov, and U. Gosele (2002)
Science 296, 2006-2009
   Abstract »    Full Text »    PDF »
A-Axis--Oriented YBa2Cu3O7/PrBa2Cu3O7 Superlattices.
C. B. EOM, A. F. MARSHALL, J. -M. TRISCONE, B. WILKENS, S. S. LADERMAN, and T. H. GEBALLE (1991)
Science 251, 780-783
   Abstract »    PDF »


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Science. ISSN 0036-8075 (print), 1095-9203 (online)