Processing, Fabrication, Characterization and Device Demonstration of High Temperature Superconducting Ceramics

Abstract

A detailed small-angle neutron scattering study of the vortex lattice in a single crystal of YBa2Cu307-x was made for a field of 0.5 tesla inclined at angles between 0 and 80 degrees to the crystalline c axis. The vortex lattice is triangular for all angles. For angles less than or equal to 70 degrees its orientation adjusts itself to maximize the pinning energy to densely and highly regularly spaced twin planes. These observations have important implications for the microscopic flux-pinning mechanism, and hence for the critical current achievable in YBa2Cu307-x. For large angles (about 80 degrees) the vortex lattice consists of independent chains in the orientation predicted by anisotropic London theory.

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Document Details

Document Type
Technical Report
Publication Date
Jul 30, 1994
Accession Number
ADA285145

Entities

People

  • Ilhan A. Aksay
  • Thomas S. Luhman

Organizations

  • Boeing Defense, Space & Security

Tags

DTIC Thesaurus Topics

  • Copper Oxides
  • Crystal Lattices
  • Demonstrations
  • Diffraction
  • Fabrication
  • High Temperature
  • High Temperature Superconductors
  • Magnetic Fields
  • Materials
  • Measurement
  • Neutron Scattering
  • Observation
  • Orientation (Direction)
  • Scattering
  • Single Crystals
  • Temperature Gradients
  • Two Dimensional

Fields of Study

  • Physics

Readers

  • Materials Science and Engineering.
  • Superconducting Magnet Technology

Technology Areas

  • Space
  • Space - Orbital Debris