Electricity: measuring and testing – Magnetic – With means to create magnetic field to test material
Patent
1999-02-11
2000-03-14
Strecker, Gerard
Electricity: measuring and testing
Magnetic
With means to create magnetic field to test material
324235, 324259, 324261, G01R 3312, G01N 2772
Patent
active
060377690
ABSTRACT:
A method of and apparatus for torque magnetometry in which a specimen, the magnetic moment of which it is desired to determine, is disposed on a support. A temporally varying, for example sinusoidal, magnetic field is generated in the region of the specimen so that interaction between the magnetic moment of the specimen and the magnetic field causes a torque to be exerted on the specimen. Consequently, the specimen and/or the support are deflected and typically exhibit a vibratory motion. The motion of the specimen and/or support due to the torque is measured. When the magnitude and direction of the magnetic field are known, the magnetic moment of the specimen can be determined from the results of the motion measurement. The frequency of the magnetic field can be adjusted so that the specimen and/or the support resonate. The support is typically a single silicon crystal having two orthogonal modes of vibration which have different resonant frequencies. This can facilitate the independent determination of the three orthogonal components of the magnetic moment of the specimen.
REFERENCES:
patent: 4037149 (1977-07-01), Foner
patent: 5001426 (1991-03-01), Frey et al.
patent: 5600241 (1997-02-01), Jacobsen
patent: 5739686 (1998-04-01), Naughton et al.
patent: 5798641 (1998-08-01), Spagna et al.
Zijlstra, H., "A Vibrating Reed Magnetometer for Microscopic Particles", Rev. Sci. Instrum. 41, 1970, pp. 1241-1243, (no month)
Rossel C et al: "Active Microlevers as Miniature Torque Magnetometers" Journal of Applied Physics, vol. 79, No. 11, Jun. 1, 1996, pp. 8166-8172.
"Low-temperature magnetic resonance force detection" WAGO et al, J. Vac. Sci. Technol. B 14 (2), Mar./Apr. 1996, p. 1197.
Farley Andrew N
Hoon Stephen R
Strecker Gerard
The Manchester Metropolitan University
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