AC magnetic susceptometer with odd harmonic measurement for anal

Details AC magnetic susceptometer with odd harmonic measurement for anal AC magnetic susceptometer with odd harmonic measurement for anal

1991-11-19

1994-02-01

Strecker, Gerard R.

Electricity: measuring and testing

Magnetic

With means to create magnetic field to test material

324201, 324224, 324232, 324233, 505726, 505843, G01R 3312, G01R 3316, G01N 2772, H01L 3900

Patent

active

052835243

ABSTRACT:
An improved AC susceptometer and methodology for its use which is particularly suitable for the characterization of the properties of superconducting materials. Added to the circuitry of a conventional AC susceptometer is frequency domain analytical equipment for measuring the induced magnetic response. The addition of frequency domain measuring equipment permits the determination of the harmonic components of the induced magnetic response. The measurement of the harmonic components of the response also provides novel methodology for studying the phenomena of flux penetration, flux pinning and movement and permits the measurement of parameters such as lower critical field, critical temperatures, and the irreversibility line.

REFERENCES:
patent: 3651397 (1972-03-01), Bodenheimer et al.
patent: 3736500 (1973-05-01), Berkowitz et al.
patent: 4105971 (1978-08-01), Nevalainen
patent: 4649495 (1987-03-01), Cagan et al.
patent: 5004726 (1991-04-01), Shaulov et al.
Ishida et al; Superconducting transition of multiconnected Josephson network; J. Appl. Phys., vol. 52, No. 11, Nov. 1981, pp. 6798-6805.

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