Epitaxial formation of a multilayer Pd-Ta surface alloy on a Ta substrate

摘要

A thick palladium layer (similar to5 nm) is deposited onto a curved tantalum surface. The system is submitted to several annealing cycles. Structural changes within 0-5 nm below the surface are observed using Field Ion Microscopy. At 800 K, an atomic intermixing of adsorbate and substrate is observed. Pd atoms are detected within the first five atomic layers of the Ta substrate. At 1100 K, a multilayer alloy is formed at the surface, oriented epitaxially with respect to the Ta{100} planes. [References: 9]