A low-energy electron diffraction study of the Pd{0 0 1}c(2 × 2)-Mn adsorbed system

An intensity analysis is made of the c(2 × 2) LEED pattern of one- to two-layer Mn films on Pd{0 0 1} to see if a theoretically-predicted antiferromagnetic structure contributes to the LEED intensities. We show that a pure magnetic structure, even if buckled, cannot fit the data. However, a mixed, strongly-buckled MnPd surface layer, with the Mn sublayer above the Pd sublayer, gives a moderately good fit. Annealing of the system produces a bulk Pd3Mn alloy with the Cu3Au structure and a buckled relaxed first atomic layer, but with the Mn sublayer now below the Pd sublayer. © 1990.