发明名称 Magnetometer for measuring the magnetic moment of a specimen
摘要 PCT No. PCT/DE88/00532 Sec. 371 Date Jun. 8, 1989 Sec. 102(e) Date Jun. 8, 1989 PCT Filed Aug. 31, 1988 PCT Pub. No. WO89/03535 PCT Pub. Date Apr. 20, 1989.In a magnetometer with an inhomogeneous magnetic field which timewise changes in its intensity periodically and acts upon the specimen to be measured, the latter being attached to the free end of a tongue (8) that can be oscillated and whose oscillations can be determined by piezo elements (12, 13), there occurs a compensation of the magnetic moment of the specimen with the aid of a compensating current loop (33). The current required for arresting the oscillations is a measure of the magnetic moment to be determined. An adaptation to the resonance frequency of the oscillating tongue (8) is effected through a frequency control cirucit (22, 28, 6), making it possible to measure large temperature ranges at great sensitivity and contingent on temperature.
申请公布号 US5001426(A) 申请公布日期 1991.03.19
申请号 US19890381655 申请日期 1989.06.08
申请人 FRAUNHOFER-GESELLSCHAFT ZUR FORDERUNG DER ANGEWANDTEN FORSCHUNG E.V. 发明人 FREY, THOMAS;JANTZ, WOLFGANG;STIBAL, RUDOLF
分类号 G01N27/72;G01R33/12 主分类号 G01N27/72
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