Method for Measuring the Resistive Transition and Critical Current in Superconductors using Pulsed Current.
Abstract
The present invention provides a method for measuring the intragranular and intergranular critical current of a granular superconductive material, comprising the steps of: (1) conducting a substantially rectangular electronic pulse through the material so as to conduct a current through the material such that when the intergranular critical current of the material is exceeded, any grains present in the material remain in a superconducting state when the current level is below the intragranular critical current; (2) measuring the current through the material while conducting the pulse; (3) measuring a voltage difference across the material while conducting the pulse; (4) determining the non-zero voltage difference across the material and contemporaneously measuring the current; and (5) determining the intragranular critical current through the material by varying the current to discern a current level at which the electrical resistance of the material increases to that of the non-superconducting state as the grains of the material transition from the superconducting to a non-superconducting state. This method may also be used to determine the critical current of a homogeneous superconductive material
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 29, 1993
- Accession Number
- ADD015829
Entities
People
- Thomas E. Jones
- Wayne C. Mcginnis
Organizations
- United States Department of the Navy