Abstract: Several methods to improve the linearity of anisotropic magnetoresistance (AMR) sensors were suggested based on the analysis of the generation of nonlinearity in magnetoresistive sensors of metallic films. Ni₈₀Fe₂₀ and Ni₆₅Co₃₅ AMR thin films were prepared by DC magnetic sputtering. Some AMR sensors were made by the micro-fabrication technique, and the testing results were also presented.