Temperature Dependence of the Hall Coefficients in Some Silver Palladium Alloys

The Hall coefficient for Ag-Pd alloys containing 80% and 60% Pd has been measured as a function of temperature from 4°K to 300°K. These alloys are of great interest because their electronic structure is is similar to that of the Cu-Ni alloys, which have been investigated recently. The Hall coefficient has been found to be strongly temperature-dependent in the Ag-Pd alloys; however, the form of the temperature dependence is different from that observed in the ferromagnetic Cu-Ni alloys and is well represented by an empirical equation of the form ${R_0}^{*}=A+\frac{C}{(T-\theta )}$. Since the extraordinary Hall effect causes Cu-Ni alloys to exhibit a similar behavior when measured above their Curie temperatures, the temperature dependence in these Pd-Ag alloys is ascribed to an extraordinary Hall effect.