Experiments on Large Single Crystals of the Superconducting Oxides YBa(2)Cu(3)O(7), La(2-x)BA(x)CuO(4), and BiCa-Sr-Cu-O

Abstract

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. (AW)

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Document Details

Document Type
Technical Report
Publication Date
Oct 30, 1989
Accession Number
ADA215283

Entities

People

  • N. P. Ong

Organizations

  • Princeton University

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Abstracts
  • Air Force
  • Anisotropy
  • Annealing
  • Conductivity
  • Copper Oxides
  • Crystals
  • High Pressure
  • High Temperature
  • High Temperature Superconductors
  • Laboratory Magnetometers
  • Magnetic Fields
  • Measurement
  • Single Crystals
  • Superconductivity
  • Transition Temperature
  • Yttrium Barium Copper Oxides

Fields of Study

  • Physics

Readers

  • Materials Science and Engineering.
  • Superconducting Magnet Technology