The extraordinary Hall effect was investigated for planar arrays Fe nanoparticles embedded in an ultrathin Pt matrix. It was found that the slope of Hall resistance (R_H) reversed sign at ±0.15 T for Fe particles of mean thickness 0.3 nm. The dependence is presumably due to the effect of two spin-orbital induced mechanisms of carriers scattering, skew scattering, and side jump, with the skew component of positive sign and the side jump component of negative sign. For Fe samples, 0.6 nm thick R_H increases monotonically with the magnetic field value. At low temperatures, the superparamagnetism of the samples disappeared.
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