Comparison of bulk R{sub 2{minus}z}Ce{sub z}CuO{sub 4} with superlattice R{sub 2{minus}z}Ce{sub z}CuO{sub 4}/SrO/NbO{sub 2}/SrO/CuO{sub 2}
- Department of Physics, University of Notre Dame, Notre Dame, Indiana 46556 (United States)
- Department of Physics, Arizona State University, Tempe, Arizona 85287-1504 (United States)
Bulk R{sub 2{minus}z}Ce{sub z}CuO{sub 4} compounds superconduct for trivalent ions R=Pr, Nd, Sm, and Eu, but not for Gd or for Cm (with Th replacing Ce). R{sub 2{minus}z}Ce{sub z}Sr{sub 2}Cu{sub 2}NbO{sub 10} is a natural superlattice of R{sub 2{minus}z}Ce{sub z}CuO{sub 4} and the layers SrO/NbO{sub 2}/SrO/CuO{sub 2}; it exhibits bulk superconductivity for R=Nd, Sm, Eu, and Gd, but not for R=Pr. These differences imply that the superconducting regions in the bulk and in the superlattice must be different, and not both cuprate planes. The primary superconductivity is assigned to interstitial oxygen and Nd-O layers in the bulk and to Sr-O layers in the superlattice. {copyright} {ital 1999} {ital The American Physical Society}
- OSTI ID:
- 690734
- Journal Information:
- Physical Review, B: Condensed Matter, Journal Name: Physical Review, B: Condensed Matter Journal Issue: 18 Vol. 60; ISSN PRBMDO; ISSN 0163-1829
- Country of Publication:
- United States
- Language:
- English
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CERIUM OXIDES
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COPPER OXIDE SOLAR CELLS
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CRYSTAL STRUCTURE
EUROPIUM OXIDES
GADOLINIUM OXIDES
HIGH-TC SUPERCONDUCTORS
INTERSTITIALS
LAYERS
NEODYMIUM OXIDES
NIOBIUM COMPOUNDS
PRASEODYMIUM OXIDES
RARE EARTH COMPOUNDS
SAMARIUM OXIDES
STRONTIUM COMPOUNDS
STRONTIUM OXIDES
SUPERCONDUCTIVITY
SUPERLATTICES