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Comparative analysis of the behavior of AMR position sensors in real-life magnetic fields

P. DIMITROVA1,* , S. ANDREEV1, L. POPOVA1

Affiliation

  1. Institute of Solid State Physics, Bulgarian Academy of Sciences, 72 Tzarigradsko Chaussee Blvd., 1784 Sofia, Bulgaria

Abstract

Three types of AMR bridge sensor have been investigated: Barber-pole structures, structures with rotated anisotropy axes and shielded versions. Samples were prepared on oxidized Si wafers by technology based on the magnetization after annealing of a permalloy layer at 450 oC. The bridge response was analyzed for conditions near to the real industrial applications. The experimental characteristics obtained, and the differential response signal, are compared with curves simulated by a simulation program. Response signals suitable for further processing were obtained for structures with rotated anisotropy axis..

Keywords

Thin films, Magnetoresistors, Position sensors.

Submitted at: Nov. 1, 2006
Accepted at: Feb. 15, 2007

Citation

P. DIMITROVA, S. ANDREEV, L. POPOVA, Comparative analysis of the behavior of AMR position sensors in real-life magnetic fields, Journal of Optoelectronics and Advanced Materials Vol. 9, Iss. 2, pp. 319-322 (2007)