Title :
Crossfield Sensitivity in AMR Sensors
Author :
Pavel Ripka;Michal Janosek;Mattia Butta
Author_Institution :
Dept. of Meas., Czech Tech. Univ. in Prague, Prague, Czech Republic
Abstract :
We discuss the origin of the crossfield sensitivity of AMR sensors, the way how this error may influence the performance of an AMR compass and methods for its correction. Finally, we confirm the simple formulas experimentally. Crossfield may cause compass error up to 2.6 deg., depending on the compass orientation. The most effective way to suppress the crossfield error is using magnetic feedback, however this is not always possible. We suggest a method of processing of the SET/RESET sensor outputs which is more efficient than the usual averaging.
Keywords :
"Magnetic sensors","Anisotropic magnetoresistance","Azimuth","Magnetic anisotropy","Perpendicular magnetic anisotropy","Error correction","Sensor systems","Electric variables measurement","Feedback","Magnetic materials"
Journal_Title :
IEEE Transactions on Magnetics
DOI :
10.1109/TMAG.2009.2022051
