Anomalous Hall effect in highly Mn-Doped silicon films

The transport and magnetic properties of Mn (x) Si1 - x films with a high (x a parts per thousand 0.35) content of Mn produced by laser deposition at growth temperatures of 300-350A degrees C have been studied in a temperature range of 5-300 K in magnetic fields of up to 2.5 T. The films exhibit a hole-type metallic conductivity and a relatively weak change of magnetization in a temperature range of 50-200 K. An anomalous Hall effect with an essentially hysteretic behavior from 50 K up to a parts per thousand 230 K has been discovered. The properties of the films are explained by the two-phase model, in which ferromagnetic clusters containing interstitial Mn ions with a localized magnetic moment are embedded in the matrix of a weak band MnSi2 - x (x a parts per thousand 0.3) type ferromagnet with delocalized spin density.