Effect of energetic-charged-particle bombardment on the properties of thin films of high-Tc superconductors. Final technical report
The effects of low-fluence ( < 10 U/sq cm) 63-MeV H(+) and 65 MeV He2 irradiation of prototype thin films of YBa2Cu3O(7 - delta), produced by a plasma arc-spray technique are examined. The observed change in the resistance versus temperature behavior is much more dramatic than that observed for films produced by other techniques and resembles qualitatively a bond-percolation threshold. The radiation sensitivity of these plasma-arc spray films is concluded to be due to poor intergranular characteristics. This information is being used to modify the processing steps to improve the properties of films produced by this technique. In contrast, high-energy H- and He-ion irradiation of the laser-evaporated films resulted in a negligible change in the resistance-temperature behavior. The low-energy B and N ion irradiation of the laser-evaporated films had the effect of a gradual lowering of the completion temperature of the superconducting transition (T/sub C/ - completion). The gradual lowering of T/sub C/ - completion with fluence, d (delta T/sub c/) / d phi, with similar results by other groups. This behavior is interpreted as a progressive decoupling of the grains and extrinsic to that of the bulk YBa2Cu3O(7-delta).
- Research Organization:
- Naval Research Lab., Washington, DC (USA)
- OSTI ID:
- 6526444
- Report Number(s):
- AD-A-199883/0/XAB
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
BARIUM COMPOUNDS
CUPRATES
COPPER COMPOUNDS
SUPERCONDUCTIVITY
SUPERCONDUCTING FILMS
PHYSICAL RADIATION EFFECTS
YTTRIUM COMPOUNDS
BONDING
HELIUM IONS
HYDROGEN IONS 1 PLUS
PROGRESS REPORT
SENSITIVITY
SPRAYS
SUPERCONDUCTORS
THIN FILMS
TRANSITION TEMPERATURE
ALKALINE EARTH METAL COMPOUNDS
CATIONS
CHARGED PARTICLES
DOCUMENT TYPES
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
FABRICATION
FILMS
HYDROGEN IONS
IONS
JOINING
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
RADIATION EFFECTS
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
360204* - Ceramics
Cermets
& Refractories- Physical Properties
360206 - Ceramics
Cermets
& Refractories- Radiation Effects