Supercurrent distribution in high-TC superconducting YBa2Cu3O7-y thin films by scanning superconducting quantum interference device microscopy
ApplPhysLett_77_3069.pdf 394 KB
The two-dimensional vector mapping of current distributions in high-TC superconducting YBa2Cu3O7-y thin films obtained by converting magnetic-field data measured by scanning superconducting quantum interference device (SQUID) microscopy is reported. The current distribution contains the contributions from both transport supercurrent and vortex current. The transport supercurrent is found to flow mainly along the edge of a stripline, and the numerical calculation based on the simple London model by taking the specific sample-detector geometry into account is given. The agreement between the experimental data and the calculated results is good, demonstrating that the scanning SQUID microscope provides a useful tool for studying the current distribution in a superconductor.
Applied Physics Letters
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American Institute of Physics
Copyright (c) 2000 American Institute of Physics.
Graduate School of Integrated Arts and Sciences