HIGH-FIELD FORCED MAGNETORESISTANCES OF CO-PD ALLOYS

The high-field susceptibility chi(HF) of Co100-xPdx alloys have been m easured by a SQUID magnetometer at 5 K. For the same series of Co-Pd a lloys, the high-field longitudinal forced magnetoresistance F-MR were also measured in a superconducting-magnet system. Both chi(HF) and F-M R data are plotted as a function of Pd concentration x. We find that c hi(HF) and F-MR are closely related, because both quantities are propo rtional to the absolute value of the orbital angular momentum \[L(z)]\ in the alloys. The local minimum and maximum positions of both chi(HF ) and F-MR can be located. They agree reasonably well with the predict ions of gap position x(G) from the split-band theory, and that of the largest [L(z)] position x(L) from the quadrupole scattering theory.