Temperature dependence of the magnetic and transport properties of Co15Cu85 magnetic granular alloys

The temperature dependence of magnetic and transport properties of annealed ${\mathrm{Co}}_{\mathrm{15}}{\mathrm{Cu}}_{\mathrm{85}}$ alloys has been studied from 2 to 300 K. It was found that the magnetic property and resistivity significantly change with the temperature. Based on the two-current resistance model, we have calculated the electron spin-mixing parameter $\mathrm{Q(T),}$ which explains the magnetoresistance change with the temperature for granular ${\mathrm{Co}}_{\mathrm{15}}{\mathrm{Cu}}_{\mathrm{85}}$ alloys.