NON-CONTACT METHODS USED FOR CHARACTERIZATION OF HIGH CRITICAL TEMPERATURE SUPERCONDUCTORS.

Type of article: Article

Summary

NON-CONTACT EDDY-CURRENT TECHNIQUES FOR CHARACTERIZING SUPERCONDUCTORS BETWEEN 5 MEGAHERTZ AND 1 GIGAHERTZ 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 IS PARTICULARLY USEFUL FOR DETERMINING THE CRITICAL TEMPERATURE AND TRANSITION WIDTH FOR SUPERCONDUCTING SAMPLES.

Details

Original title: NON-CONTACT METHODS USED FOR CHARACTERIZATION OF HIGH CRITICAL TEMPERATURE SUPERCONDUCTORS.
Record ID : 1989-0019
Languages: English
Source: Rev. sci. Instrum. - vol. 59 - n. 4
Publication date: 1988
Document available for consultation in the library of the IIR headquarters only.

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Indexing

Themes: Cryogenics safety, instrumentation and metrology;
Superconduction
Keywords: Superconduction; Measurement; Critical temperature; Superconductor; Electric property; High temperature