A-axis-oriented YBa2Cu3O7/PrBa2Cu3O7 superlattices

A modulated structure has been fabricated from high transition temperature superconductors where the individual CuO(2) planes are composed of alternating superconducting and insulating strips. This structure is made by growing a-axis-oriented YBa(2)Cu(3)O(7)/PrBa(2)Cu(3)O(7) superlattices by 90 degr...

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Veröffentlicht in:	Science (American Association for the Advancement of Science) 1991-02, Vol.251 (4995), p.780-783
Hauptverfasser:	EOM, C. B, MARSHALL, A. F, TRISCONE, J.-M, WILKENS, B, LADERMAN, S. S, GERBALLE, T. H
Format:	Artikel
Sprache:	eng
Schlagworte:	Condensed matter: structure, mechanical and thermal properties Copper oxide superconductors Exact sciences and technology High temperature superconductors Low-dimensional structures (superlattices, quantum well structures, multilayers): structure, and nonelectronic properties Physics Surfaces and interfaces thin films and whiskers (structure and nonelectronic properties)
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Beschreibung
Zusammenfassung:	A modulated structure has been fabricated from high transition temperature superconductors where the individual CuO(2) planes are composed of alternating superconducting and insulating strips. This structure is made by growing a-axis-oriented YBa(2)Cu(3)O(7)/PrBa(2)Cu(3)O(7) superlattices by 90 degrees off-axis sputtering on (100)SrTiO(3) and (100)LaAlO(3) substrates. Superlattice modulation is observed to a modulation wavelength of 24 angstroms (12 angstroms-YBa(2)Cu(3)O(7)/12 angstroms-PrBa(2)Cu(3)O(7)), 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.
ISSN:	0036-8075 1095-9203
DOI:	10.1126/science.251.4995.780