Thickness variations in extraordinary and spontaneous Hall coefficients of iron films

Abstract
The thickness, d, dependence of the extraordinary (R1) and spontaneous (Rs) Hall coefficients of iron films was studied in the range 100-1 000 Å. The R1.a and Rs.a versus a curves exhibit a straight line behaviour; this is interpreted in terms of size effects in the total film resistivity in agreement with some theoretical studies on the Hall effect in bulk ferromagnetics which have predicted that the SHC is proportional to the square of the