Magnetic imaging of superconducting tapes to determine current flow
- Geoffrey W.
- Marilyn E.
- Stephen R.
- Fred M.
We have developed a magnetic imaging system that uses magnetoresistive read heads from computer hard disk drives to map the transport-current-induced magnetic field at the surface of superconducting tapes at liquid nitrogen temperature. Transport current pathways are determined from the 2-dimensional magnetic field maps using established inversion schemes. We examined the current flow in pulsed-laser-deposited YBa{sub 2}Cu{sub 3}O{sub 7-{delta}} a films patterned on single crystal SrTiO{sub 3} substrates and on a textured yttria-stabilized-zirconia layer deposited on an Inconel ribbon by ion beam assisted deposition. The transport current densities in all cases were consistent with the Critical State Model. For the Inconel-based sample, the transport current density maps have allowed us to observe defects and determine the region that limits the current carrying capacity of the structure.
- Research Organization:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 975117
- Report Number(s):
- LA-UR-01-0402; LA-UR-01-402; TRN: US201008%%4
- Resource Relation:
- Journal Volume: 659; Conference: "Submitted to: Proceedings of the Fall 2000 Meeting of the Materials Research Society."
- Country of Publication:
- United States
- Language:
- English
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