Substrate effect on the superconductivity of YBa/sub 2/Cu/sub 3/O/sub 7/ thin films

Conference · Thu Feb 25 04:00:00 EST 1988 · AIP Conf. Proc.; (United States)

OSTI ID:7192494

Cuomo, J J; Chisholm, M F; Yee, D S; Mikalsen, D J; Madakson, P B; Roy, R A; Giess, E; Scilla, G

The interaction between the substrate and YBa/sub 2/Cu/sub 3/O/sub 7/ films made by ion beam sputtering and e-beam evaporation is found to significantly influence the superconducting transition temperature, T/sub c/. The substrates investigated are Al/sub 2/O/sub 3/, MgO, SrTiO/sub 3/, ZrO/sub 2/-9% Y/sub 2/O/sub 3/ (YSZ), and BaF/sub 2/. In the case of Al/sub 2/O/sub 3/, a spinel is formed at the interface and Al is found to be present in solution in the YBa/sub 2/Cu/sub 3/O/sub 7/. This reaction significantly depresses T/sub c/. For SrTiO/sub 3/, both Sr and Ti are found in the film without severely depressing the T/sub c/; this, however, depends on the annealing conditions. Although under similar conditions little interaction was observed for the MgO substrates, a moderate reduction in T/sub c/ was observed. An interaction zone of BaZrO/sub 3/ perovskite is formed at the interface between the YSZ substate and the 123 structure. In addition, Zr is found in solution in the 123 film. The presence of Zr has little effect on the T/sub c/. The films were characterized using Rutherford backscattering spectroscopy (RBS), transmission electron microscopy (TEM), energy dispersive spectroscopy (EDS), secondary ion mass spectroscopy (SIMS), x-ray and electron diffraction and resistance vs temperature measurements.

• Research Organization: IBM Watson Research Center, Yorktown Heights, NY 10598
• OSTI ID: 7192494
• Report Number(s): CONF-871178-
• Conference Information: Journal Name: AIP Conf. Proc.; (United States) Journal Volume: 165:1
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360202 -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
656100 -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALINE EARTH METAL COMPOUNDS
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
BARIUM COMPOUNDS
BARIUM FLUORIDES
BEAMS
BINDING ENERGY
CHALCOGENIDES
COHERENT SCATTERING
COPPER COMPOUNDS
COPPER OXIDES
DIFFRACTION
ELASTIC SCATTERING
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELECTRON BEAMS
ELECTRON DIFFRACTION
ENERGY
EVAPORATION
FILMS
FLUORIDES
FLUORINE COMPOUNDS
HALIDES
HALOGEN COMPOUNDS
INHIBITION
ION BEAMS
LEPTON BEAMS
MAGNESIUM COMPOUNDS
MAGNESIUM OXIDES
MASS SPECTRA
MINERALS
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
PARTICLE BEAMS
PHASE TRANSFORMATIONS
PHYSICAL PROPERTIES
RUTHERFORD SCATTERING
SCATTERING
SPECTRA
SPINELS
SPUTTERING
STRONTIUM COMPOUNDS
STRONTIUM TITANATES
SUPERCONDUCTING FILMS
SUPERCONDUCTIVITY
TEMPERATURE DEPENDENCE
THERMODYNAMIC PROPERTIES
TITANATES
TITANIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE
X-RAY DIFFRACTION
YTTRIUM COMPOUNDS
ZIRCONIUM COMPOUNDS
ZIRCONIUM OXIDES