Electronic Resource
Woodbury, NY
:
American Institute of Physics (AIP)
Applied Physics Letters
71 (1997), S. 2202-2204
ISSN:
1077-3118
Source:
AIP Digital Archive
Topics:
Physics
Notes:
We have mounted magnetic γ−Fe2O3 particles on the end of a microcantilever in order to make a high sensitivity magnetic field sensor. An externally applied magnetic field exerts a torque on the acicular oxide particles which in turn deflects the cantilever. The deflection is measured using a sensitive optical detection system. We show how the effect of drift in the optical signal can be eliminated by continuously flipping the magnetization direction within the oxide by applying short, intense pulses of magnetic field. The sensor can resolve changes in applied field as small as 10−4 G (10 nT), and has good linearity over five orders of magnitude of applied field strength. © 1997 American Institute of Physics.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.119381
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