Mapping the Current Distribution in YBa(2)Cu(3)O(7-x) Thin Films with Striations

Abstract

We have studied the transport current distributions in striated YBa2Cu3O(7-X) (YBCO) films and coated conductors using variable temperature scanning laser microscopy (VTSLM). VTSLM images reveal the location of incomplete separation between filaments due to un-optimized sample processing parameters. When the current flows parallel to the completely separated striations, the current seems to flow within a strip without inter-mixing via the substrate. Initial resistivity measurements on metallic inter-filamentary connections (gold dots) exhibit a semiconducting behavior. VTSLM images clearly show that the current flows between filaments via the metallic inter-connect, indicating the semiconducting resistive behavior is due to the interface between YBCO and metallic layer. The results demonstrate the potential of VTSLM technique in investigating current sharing and normal metal inter-connect issues for the coated conductor development for ac applications.

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Document Details

Document Type
Technical Report
Publication Date
Jun 01, 2004
Accession Number
ADA461884

Entities

People

  • C. Kwon
  • George A. Levin
  • J. L. Young
  • L. B. Wang
  • M. B. Price
  • Paul N. Barnes
  • Timothy J. Haugan

Tags

Communities of Interest

  • Advanced Electronics

DTIC Thesaurus Topics

  • Air Force
  • Air Force Research Laboratories
  • Current Density
  • Filaments
  • Films
  • Laser Microscopy
  • Lasers
  • Measurement
  • Microscopy
  • Military Research
  • Resistance
  • Scanning
  • Striations
  • Substrates
  • Superconductors
  • Thin Films
  • Transport Ships

Fields of Study

  • Physics

Readers

  • Superconducting Magnet Technology
  • Thin Film Deposition Science.

Technology Areas

  • Directed Energy
  • Directed Energy - Pulsed-Laser Deposition