Torque magnetometry in pulsed magnetic fields with use of a commercial microcantilever

A miniature torquemeter for use in a pulsed magnetic field is developed by utilizing a commercially available piezoresistive microcantilever. The high sensitivity of similar to5x10(-13) Am-2 at 38 T is achieved. The response to faster signals were considerably improved due to high eigenfrequency of the cantilever (fsimilar to250-300 kHz). In this article, we successfully demonstrate the magnetic torque data of samples of sub-mug order in pulsed magnetic fields up to 38 T with pulse duration of less than 60 ms. We also found that the de Haas-van Alphen data are in good agreement with the previous reports obtained in steady magnetic fields. (C) 2002 American Institute of Physics.