Ni/YBa sub 2 Cu sub 3 O sub 7 minus sub x and Ni/Bi sub 2 Sr sub 2 Ca sub 0. 8 Y sub 0. 2 Cu sub 2 O sub x interface formation: Reactivity, segregation, and chemical trapping
- Department of Chemical Engineering Department of Materials Science, University of Minnesota, Minneapolis, Minnesota (US)
- Argonne National Laboratory, Argonne, Illinois (US)
Interfaces formed by condensing Ni atoms onto YBa{sub 2}Cu{sub 3}O{sub 7{minus}{ital x}} (Y-123) and Bi{sub 2}Sr{sub 2}Ca{sub 0.8}Y{sub 0.2}Cu{sub 2}O{sub {ital x}} (Bi-2212) have been studied with x-ray photoelectron spectroscopy. For both Y-123 and Bi-2212, the Ni 2{ital p}{sub 3/2} and O 1{ital s} core level features indicate Ni--O reactions and changes in the Cu 2{ital p}{sub 3/2} emission that reflect reduction from nominal Cu{sup 2+} to Cu{sup 1+} oxidation states. Ni deposition onto Bi-2212 also reduces Bi--O bonding and releases Bi atoms. For Ni/Y-123, analysis of emission intensities as a function of coverage shows that O and Ba intermix in the growing metal overlayer but that Cu is trapped at the buried interface. For Ni/Bi-2212, similar analysis shows O and Bi intermixing but less effective Cu trapping.
- OSTI ID:
- 6258965
- Journal Information:
- Journal of Materials Research; (USA), Journal Name: Journal of Materials Research; (USA) Vol. 6:2; ISSN JMREE; ISSN 0884-2914
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
CHEMICAL REACTIONS
COPPER COMPOUNDS
COPPER OXIDES
ELECTROMAGNETIC RADIATION
ELECTRON SPECTROSCOPY
ELECTRONIC STRUCTURE
ELEMENTS
HIGH-TC SUPERCONDUCTORS
INTERFACES
IONIZING RADIATIONS
METALS
NICKEL
OXIDATION
OXIDES
OXYGEN COMPOUNDS
PHOTOELECTRON SPECTROSCOPY
RADIATIONS
SEGREGATION
SPECTROSCOPY
SUPERCONDUCTORS
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
X RADIATION
YTTRIUM COMPOUNDS
YTTRIUM OXIDES