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Helium-Free Torque Magnetometer up to 10 kG at 1.5-300 K
Mitsuyuki TSUJI Nariaki YAMAMOTO Shin'ichiro NAKATA Shuichi KAWAMATA Takekazu ISHIDA Satoru OKAYASU Kiichi HOJOU
IEICE TRANSACTIONS on Electronics
Publication Date: 2002/03/01
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Issue on Superconductive Electronics)
Category: Instruments and Coolers
torque magnetometer, piezo resister, 1.5 K refrigerator, LabVIEW, calibration,
Full Text: PDF(1.1MB)>>
We have developed a new torque magnetometer on the basis of a 4-K refrigerator. The system temperature can be lowered down to 1.5 K by pumping liquefied helium from a top loading sample space. A piezoresistor bridge on a Si cantilever is used to detect torque acting on a sample. A transverse magnetic field is supplied by a variable-field permanent magnet up to 10 kG. We find that a sensitivity of our torque magnetometer is Δ τ 10-10 Nm.