Critical current and resistivity measurements in a ceramic superconductor
- 30 June 1988
- journal article
- Published by IOP Publishing in Journal of Physics C: Solid State Physics
- Vol. 21 (18) , L673-L677
- https://doi.org/10.1088/0022-3719/21/18/003
Abstract
The critical current and resistivity of the ceramic superconductor Y1Ba2Cu3O7- delta have been measured by a very simple yet sensitive contactless technique. A toroidal specimen formed the tertiary winding of a small ferrite transformer. Signals from the secondary indicate when the critical current is exceeded in the superconducting state and yield the resistivity in the normal state. The mean critical current density in one specimen was found to be 90 A cm-2 at 77 K rising to 400 A cm-2 at 4.2 K.Keywords
This publication has 8 references indexed in Scilit:
- Macroscopic persistent currents in YBa2Cu3O7Zeitschrift für Physik B Condensed Matter, 1988
- Method for making low-resistivity contacts to high T c superconductorsApplied Physics Letters, 1988
- Persistent currents in ceramic and evaporated thin-film toroids of Ba2YCu3O7Applied Physics Letters, 1988
- The Magnetic Properties of the High- T c Superconductor Gd-Ba-Cu-O: Bulk and Ring StructuresEurophysics Letters, 1987
- Critical Currents of Superconducting Y-Ba-Cu, Dy-Ba-Cu and Gd-Ba-Cu Oxides in Low Magnetic FieldsJapanese Journal of Applied Physics, 1987
- Improved low contact resistance in high-Tc Y–Ba–Cu–O ceramic superconductorsNature, 1987
- Critical-current measurements in epitaxial films of compoundPhysical Review Letters, 1987
- Magnetization of High-Field SuperconductorsReviews of Modern Physics, 1964