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Science 15 February 1991:
Vol. 251. no. 4995, pp. 780 - 783
DOI: 10.1126/science.251.4995.780
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Articles

A-Axis—Oriented YBa2Cu3O7/PrBa2Cu3O7 Superlattices

C. B. EOM 1, A. F. MARSHALL 2, J. -M. TRISCONE 3, B. WILKENS 4, S. S. LADERMAN 5, and T. H. GEBALLE 3

1 Department of Applied Physics, Stanford University, Stanford, CA 94305.
2 Center for Materials Research, Stanford University, Stanford, CA 94305
3 Department of Applied Physics, Stanford University, Stanford, CA 94305
4 Bellcore, Red Bank, NJ 07701
5 Hewlett-Packard Co., Palo Alto, CA 94304

A modulated structure has been fabricated from high transition temperature superconductors where the individual CuO2 planes are composed of alternating superconducting and insulating strips. This structure is made by growing a-axis—oriented YBa2Cu3O7/PrBa2Cu3O7 superlattices by 90° off-axis sputtering on (100)SrTiO3 and (100)LaAlO3 substrates. Superlattice modulation is observed to a modulation wavelength of 24 angstroms (12 angstroms—YBa2Cu3O7/12 angstroms—PrBa2Cu3O7), both by x-ray diffraction and by cross-sectional transmission electron microscopy. Rutherford backscattering spectroscopy indicates a high degree of crystalline perfection with a channeling minimum yield of 3 percent. Quasi—one-dimensional conductivity should be obtainable in these structures.

Submitted on October 29, 1990
Accepted on December 20, 1990


THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
Ferroelectric Field Effect in Epitaxial Thin Film Oxide SrCuO2/Pb(Zr0.52Ti0.48)O3 Heterostructures.
C. H. Ahn, J. -M. Triscone, N. Archibald, M. Decroux, R. H. Hammond, T. H. Geballe, O. Fischer, and M. R. Beasley (1995)
Science 269, 373-376
   Abstract »    PDF »
Single-Crystal Epitaxial Thin Films of the Isotropic Metallic Oxides Sr1-xCaxRuO3 (0 le x le 1).
C. B. Eom, R. J. Cava, R. M. Fleming, J. M. Phillips, R. B. vanDover, J. H. Marshall, J. W. P. Hsu, J. J. Krajewski, and W. F. Peck Jr. (1992)
Science 258, 1766-1769
   Abstract »    PDF »


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