Microstructure study of Y--Ba--Cu oxide superconducting thin films
Grain growth as a function of annealing temperature in Y--Ba--Cu oxide superconducting thin films is presented. Effects of excess Cu on the temperature dependence of the resistance, grain growth, and sheet resistivity are discussed. This is the first systematic study of the microstructure of thin films formed by the nonvacuum technique of metallo organic deposition. The Cu-rich films show an anomalous behavior in the resistivity at 220--240 K. The presence of excess Cu was found to enhance grain growth for films annealed below the melting point of the 1--2--3 phase. Films deposited on <100> SrTiO/sub 3/ and rapid thermal annealed showed partial epitaxial growth of the 1--2--3 phase. The analytical techniques of Rutherford backscattering spectrometry, ion channeling, x-ray diffraction, scanning electron microscopy, electron microprobe analysis, sheet resistivity, and temperature versus resistance measurements have been used in this study.
- Research Organization:
- Electrical and Electronics Engineering Department, GM Research Laboratories, Warren, Michigan 48090-9055
- OSTI ID:
- 6749501
- Journal Information:
- J. Mat. Res.; (United States), Journal Name: J. Mat. Res.; (United States) Vol. 3:6; ISSN JMREE
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360202* -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
ALKALINE EARTH METAL COMPOUNDS
ANNEALING
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
CHEMICAL REACTIONS
COPPER COMPOUNDS
COPPER OXIDES
CRYSTAL GROWTH
CRYSTAL STRUCTURE
DECOMPOSITION
DEPOSITION
FILMS
HEAT TREATMENTS
MICROSTRUCTURE
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
PYROLYSIS
SUPERCONDUCTING FILMS
TEMPERATURE DEPENDENCE
THERMOCHEMICAL PROCESSES
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE
YTTRIUM COMPOUNDS
YTTRIUM OXIDES