Magnetic and galvanomagnetic properties of amorphous Co-metal films

Experimental studies of the saturation magnetization 4πM
s
, the saturation magnetostriction λ
s
and galvanomagnetic properties of Co-M (M: early transition metal) have been systematically carried out at room temperature. The composition dependence of 4πM
s
, of the anisotropic magnetoresistance Δ ρ/ρ
0
and of λ
s
are seen to depend on the valence difference between Co and M. The dependence of 4πM
s
on the composition reflects Friedel's theory. λ
s
and Δ ρ/ρ
0
depend on the number of electrons in the outer shell which varies with M. The quantum mechanical side jump mechanism is found to dominate the extraordinary Hall effect R
s
.