Experiments on large single crystals of the superconducting oxides YBa sub 2 Cu sub 3 O sub 7 , La(2-x)Ba(x)CuO sub 4 , and BiCa-Sr-Cu-O. Final report, 2 October 1988-28 February 1989
The growth and characterization of single crystals of the high temperature superconductors was investigated. High temperature, high pressure annealing of crystals of YBCO was carried out and found to be ineffective in further raising the Tc of the crystals beyond 93 K. Torque magnetometry measurements on YBCO crystals showed that the coherence length anisotropy is 5.5, independent of temperature in the range 80 to 90 K. The growth of the 40 K system based on LaCuO doped with Ba, was attempted. Large crystals were obtained, but the Ba content (x approx. 0.5) was too high to sustain high temperature superconductivity. Keywords: Yttrium barium copper oxides, Lanthanum copper oxides, Bismuth calcium strontium copper oxides.
- Research Organization:
- Princeton Univ., NJ (USA). Dept. of Physics
- OSTI ID:
- 6986233
- Report Number(s):
- AD-A-215283/3/XAB
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
BARIUM OXIDES
CRYSTAL GROWTH
SUPERCONDUCTIVITY
BISMUTH OXIDES
CALCIUM OXIDES
COPPER OXIDES
LANTHANUM OXIDES
STRONTIUM OXIDES
YTTRIUM OXIDES
ANISOTROPY
ANNEALING
CRYSTALS
HIGH PRESSURE
HIGH TEMPERATURE
MONOCRYSTALS
PROGRESS REPORT
SUPERCONDUCTORS
TORQUE
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BISMUTH COMPOUNDS
CALCIUM COMPOUNDS
CHALCOGENIDES
COPPER COMPOUNDS
DOCUMENT TYPES
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
HEAT TREATMENTS
LANTHANUM COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
RARE EARTH COMPOUNDS
STRONTIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
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Cermets
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360202 - Ceramics
Cermets
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656100 - Condensed Matter Physics- Superconductivity