Method for measuring the resistive transition and critical current in superconductors using pulsed current

Patent · Tue Jun 29 00:00:00 EDT 1993

OSTI ID:6375373

McGinnis, W C; Jones, T E

A method is described for measuring the intragranular critical current of a granular superconductive material, comprising the steps of: conducting a substantially rectangular electronic pulse through said material so as to conduct a current through said material such that when said intragranular critical current of said material is exceeded, any grains present in said material are in a superconducting state when said current is less than said intragranular critical current, said material having a critical temperature; measuring said current through said material while conducting said pulse; measuring a voltage difference across said material while conducting said pulse; and determining said intragranular critical current through said material by varying said current to discern a current level at which an electrical resistance of said material increases to that of a non-superconducting state as the grains of said material transition from said superconducting to said non-superconducting state.

• Assignee: Secretary of the Navy, Washington, DC (United States)
• Patent Number(s): US 5223798; A
• Application Number: PPN: US 7-606396
• OSTI ID: 6375373
• Resource Relation: Patent File Date: 31 Oct 1990
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
MEASURING INSTRUMENTS
DESIGN
SUPERCONDUCTORS
CRITICAL CURRENT
ELECTRIC CONDUCTIVITY
ELECTRIC POTENTIAL
GRANULAR MATERIALS
MEASURING METHODS
PERFORMANCE
TRANSITION TEMPERATURE
CURRENTS
ELECTRIC CURRENTS
ELECTRICAL PROPERTIES
MATERIALS
PHYSICAL PROPERTIES
THERMODYNAMIC PROPERTIES
665411* - Basic Superconductivity Studies- (1992-)