Apparatus for characterizing conductivity of superconducting materials

Patent · Mon Dec 06 23:00:00 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): A; US 5268646
• OSTI ID: 5403904
• Country of Publication: United States
• Language: English

Related Subjects

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