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Title: Apparatus for characterizing conductivity of superconducting materials

Patent ·
OSTI ID:869057
 [1]
  1. Los Alamos, NM
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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.

Research Organization:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
DOE Contract Number:
W-7405-ENG-36
Assignee:
University of California Patent, Trademark & Copyright Office (Alameda, CA)
Patent Number(s):
US 5268646
OSTI ID:
869057
Country of Publication:
United States
Language:
English

References (4)

Calibration of ac susceptometer for cylindrical specimens journal May 1984
Effect of the Energy Gap on the Penetration Depth of Superconductors journal January 1959
Contactless method of measuring resistivity journal June 1976
Upper critical fields of the superconducting layered compounds Nb1?x Ta x Se2 journal September 1984

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apparatus
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method
noncontact
radio-frequency
shielding
current
characterization
self-
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changes
inductive
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respectively
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capable
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proximity
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change
resistivity
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incorporating
inductor
resonant
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determining
frequency
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coupled
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useful
critical
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width
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resonant circuit
conducting material
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superconducting material
superconducting materials
inductive element
shielding currents
voltage induced
mutual inductance
superconducting transition
radio-frequency shielding
shielding current
characterizing conductivity
coupled inductive
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