ATOMIC AND ELECTRONIC-STRUCTURE OF THIN-FILMS OF MN ON PD(111)

Epitaxial films of Mn can be grown on Pd{111} to thickness of the order of 15-20 layers. Vacuum deposition on a room-temperature substrate produces a three-symmetric 1 x 1 phase with in-plane lattice constant a = 2.75 angstrom (pseudomorphic to Pd{111} and bulk interlayer spacing d(bulk) = 2.16 angstrom. This structure probably corresponds to strained magnetic gamma-Mn. Vacuum deposition on a 150-degrees-C substrate produces a sixfold-symmetric unroofted-radical 3 x unroofted-radical 3-30-degrees structure, which is probably a bulk phase with in-plane lattice constant a = 4.76 angstrom. The atomic structure of this phase is unknown, but may be related to alpha-Mn.