Noncontact methods used for characterization of high-T/sub c/ superconductors

Journal Article · Fri Apr 01 04:00:00 EST 1988 · Rev. Sci. Instrum.; (United States)

DOI:https://doi.org/10.1063/1.1139857· OSTI ID:5307226

Doss, J D; Cooke, D W; McCabe, C W; Maez, M A

Noncontact eddy-current techniques for characterizing superconductors between 5 MHz and 1 GHz are described. Both a transmission and a frequency-modulation technique rely on modification of the mutual inductance between a pair of coupled inductors. The sample is placed between the inductive sensors; the magnitude of eddy currents induced in the sample, a function of conductivity, modifies the mutual inductance. The frequency-modulation method (where the sensors are the inductive section of a series-resonant LC circuit in an oscillator) is particularly useful for determining the critical temperature (T/sub c/) and transition width for superconducting samples.

• Research Organization: Los Alamos National Laboratory, MP-DO, MS H844, Los Alamos, New Mexico 87545
• DOE Contract Number: W-7405-ENG-36
• OSTI ID: 5307226
• Journal Information: Rev. Sci. Instrum.; (United States), Journal Name: Rev. Sci. Instrum.; (United States) Vol. 59:4; ISSN RSINA
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420201* -- Engineering-- Cryogenic Equipment & Devices
420800 -- Engineering-- Electronic Circuits & Devices-- (-1989)
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
CRITICAL TEMPERATURE
DESIGN
EDDY CURRENT TESTING
ELECTRIC COILS
ELECTRICAL EQUIPMENT
ELECTRICAL TESTING
ELECTROMAGNETIC TESTING
ELECTRONIC CIRCUITS
EQUIPMENT
FREQUENCY DEPENDENCE
MATERIALS TESTING
NONDESTRUCTIVE TESTING
PHYSICAL PROPERTIES
SUPERCONDUCTORS
TESTING
THERMODYNAMIC PROPERTIES
TRANSITION TEMPERATURE