Effect of a Compressive Uniaxial Strain on the Critical Current Density of Grain Boundaries in Superconducting YBa2Cu3O7-delta Films (POSTPRINT)

Abstract

The mechanism by which grain boundaries impede current flow in high-temperature superconductors has resisted explanation for over two decades. We provide evidence that the strain fields around grain boundary dislocations in YBa2Cu3O7-delta thin films substantially suppress the local critical current density Jc. The removal of strain from the superconducting grain boundary channels by the application of compressive strain causes a remarkable increase in Jc. Contrary to previous understanding, the strain-free Jc of the grain boundary channels is comparable to the intrinsic Jc of the grains themselves.

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Document Details

Document Type
Technical Report
Publication Date
Mar 01, 2010
Accession Number
ADA522500

Entities

People

  • D C van der Laan
  • Paul N. Barnes
  • Timothy J. Haugan

Organizations

  • Air Force Research Laboratory

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Air Force
  • Air Force Facilities
  • Air Force Research Laboratories
  • Boundaries
  • Colorado
  • Current Density
  • Dislocations
  • Films
  • Grain Boundaries
  • High Temperature
  • High Temperature Superconductors
  • Materials
  • Military Research
  • Single Crystals
  • Superconductors
  • Thin Films
  • United States

Fields of Study

  • Physics

Readers

  • Materials Science and Engineering.
  • Quantum Dot Semiconductor Device Photonics and Graphene Optoelectronic Materials and THz Physics.