High resolution automatic magnetometer using a superconducting magnet: Application to high field susceptibility measurements

Flux creep phenomenon occurs when a magnetic sample is displaced inside a superconducting solenoid. The magnetization measurement by the classical flux integration technique is disturbed by this phenomenon. We describe a method to eliminate this perturbation. At a fixed field, using a special compen...

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Bibliographic Details
Published inIEEE transactions on magnetics Vol. 8; no. 3; pp. 630 - 633
Main Author Rebouillat, J.-P.
Format Journal Article
LanguageEnglish
Published IEEE 01.09.1972
Subjects
Creep
Magnetic anisotropy
Magnetic field measurement
Magnetic flux
Magnetic susceptibility
Magnetization
Magnetometers
Perpendicular magnetic anisotropy
Superconducting coils
Superconducting magnets
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Summary:Flux creep phenomenon occurs when a magnetic sample is displaced inside a superconducting solenoid. The magnetization measurement by the classical flux integration technique is disturbed by this phenomenon. We describe a method to eliminate this perturbation. At a fixed field, using a special compensated pick-up coil, the measurements, done at regular intervals, tend toward a final value proportional to the moment. Using an integrating digital voltmeter as fluxmeter, the short term reproducibility reaches 2 to 3.10 -6 . The apparatus is automatic. It allows measurements such as high field susceptibilities, law of approach to saturation, and anisotropic spontaneous magnetization.
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ISSN:0018-9464
1941-0069
DOI:10.1109/TMAG.1972.1067469