Frequency and field dependence of the ac susceptibility of theAuMnspin-glass

We have measured the ac susceptibility for $\mathrm{Au}\mathrm{Mn}$ containing 2.98 at.% Mn. Below the spin-glass freezing temperature $T_f$ a small frequency dependence of $\chi$ is found. The application of an external magnetic field near $T_f$ shows a distinct reduction of ${\chi }^{\prime }$. A comparison of the susceptibility behavior with that of other metallic spin-glass alloys containing manganese is made.