The Auger analysis of the Cu/Ge/Pd (150 nm/150 nm/15 nm)/n-
GaAs samples after annealing at 250 C for 30 s is shown in Fig. 3,
the data indicates the diffusion profile of multilayers. According to
reported results by Aboelfotoh, Pd12Ga5As2 and Cu3 Ge alloys are
typically formed in the two interfaces (Pd/GaAs, Cu/Ge) [6,7].