DOE Patents title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Apparatus for characterizing conductivity of superconducting materials

Abstract

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.

Inventors:
 [1]
  1. Los Alamos, NM
Issue Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
OSTI Identifier:
869057
Patent Number(s):
5268646
Assignee:
University of California Patent, Trademark & Copyright Office (Alameda, CA)
Patent Classifications (CPCs):
G - PHYSICS G01 - MEASURING G01N - INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
DOE Contract Number:  
W-7405-ENG-36
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
apparatus; characterizing; conductivity; superconducting; materials; method; noncontact; radio-frequency; shielding; current; characterization; self-; mutual; inductance; changes; inductive; elements; respectively; occur; capable; supporting; currents; placed; proximity; thereto; undergo; change; resistivity; observed; incorporating; inductor; resonant; circuit; determining; frequency; oscillation; measuring; voltage; induced; coupled; element; useful; critical; temperature; transition; width; samples; materials capable; resonant circuit; conducting material; critical temperature; superconducting material; superconducting materials; inductive element; shielding currents; voltage induced; mutual inductance; superconducting transition; radio-frequency shielding; shielding current; characterizing conductivity; coupled inductive; inductive elements; inductance changes; superconducting sample; current characterization; /324/

Citation Formats

Doss, James D. Apparatus for characterizing conductivity of superconducting materials. United States: N. p., 1993. Web.
Doss, James D. Apparatus for characterizing conductivity of superconducting materials. United States.
Doss, James D. Fri . "Apparatus for characterizing conductivity of superconducting materials". United States. https://www.osti.gov/servlets/purl/869057.
@article{osti_869057,
title = {Apparatus for characterizing conductivity of superconducting materials},
author = {Doss, James D},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1993},
month = {1}
}

Works referenced in this record:

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