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Optimization of the performance of a thin film permalloy magnetoresistive sensor

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2 Author(s)
S. Tumanski ; Warsaw Technical University, Warsaw, Poland. ; M. Stabrowski

Basic factors influencing the sensitivity of resistance sensors of magnetic field have been determined. The relation of these factors and sensor geometric form, taking into account the field non-uniformity, has been investigated numerically and experimentally. After introduction of new mathematical model of a sensor, the optimization for the two modes - for limited dissipated power and for limited supply voltage has been carried out. It has been concluded that for a given film thickness and a gap between the sensor paths (depending on the manufacturing technology) there exists an optimal value of a path width and an angle between the path and anisotropy axis. The sensor sensitivity reaches maximum in this optimum point.

Published in:

IEEE Transactions on Magnetics  (Volume:20 ,  Issue: 5 )