Apparatus for characterizing conductivity of superconducting materials

Patent · Tue Dec 07 00:00:00 EST 1993

OSTI ID:5403904

Doss, J D

Apparatus and method for noncontact, radio-frequency shielding current characterization of materials. Self- or mutual inductance changes in one or more inductive elements, respectively, occur when materials capable of supporting shielding currents are placed in proximity thereto, or undergo change in resistivity while in place. Such changes can be observed by incorporating the inductor(s) in a resonant circuit and determining the frequency of oscillation or by measuring the voltage induced on a coupled inductive element. The present invention is useful for determining the critical temperature and superconducting transition width for superconducting samples. 10 figures.

• DOE Contract Number: W-7405-ENG-36
• Assignee: Univ. of California Patent, Trademark and Copyright Office, Alameda, CA (United States)
• Patent Number(s): US 5268646; A
• OSTI ID: 5403904
• Resource Relation: Patent File Date: 24 Apr 1991
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
47 OTHER INSTRUMENTATION
ELECTRIC MEASURING INSTRUMENTS
DESIGN
SUPERCONDUCTORS
SUPERCONDUCTIVITY
TRANSITION TEMPERATURE
MEASURING METHODS
ELECTRIC CONDUCTIVITY
ELECTRICAL EQUIPMENT
ELECTRICAL PROPERTIES
EQUIPMENT
MEASURING INSTRUMENTS
PHYSICAL PROPERTIES
THERMODYNAMIC PROPERTIES
665411* - Basic Superconductivity Studies- (1992-)
440800 - Miscellaneous Instrumentation- (1990-)