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    Surface Science Monday Sessions
       Session SS2-MoP

Paper SS2-MoP17
ARPES Study of 2x2 Mn-Pt(111) Surface Alloys

Monday, October 29, 2001, 5:30 pm, Room 134/135

Session: Surfaces and Interfaces Poster Session
Presenter: F.J. Palomares, Instituto de Ciencia de Materiales de Madrid (CSIC), Spain
Authors: F.J. Palomares, Instituto de Ciencia de Materiales de Madrid (CSIC), Spain
P.P. Martin, Instituto de Ciencia de Materiales de Madrid (CSIC), Spain
H. Isern, Instituto de Ciencia de Materiales de Madrid (CSIC), Spain
M. Alonso, Instituto de Ciencia de Materiales de Madrid (CSIC), Spain
F. Soria, Instituto de Ciencia de Materiales de Madrid (CSIC), Spain
Correspondent: Click to Email
The annealing of metallic layers grown on single crystal substrates has enabled the synthesis of ordered surface alloys and metastable phases non existing in the bulk diagram. This behavior has been reported for the Mn-Pt(111) interface, for which two apparently different 2x2 surface ordered alloys are identified as temperature increases. Angle-resolved photoelectron spectroscopy with synchrotron radiation has been used to study the electronic structure of thin films of these two alloys. Normal and off-normal emission geometries are investigated, for photon energies in the range of 12 to 70 eV. The corresponding results are analyzed in comparison with those from the starting Pt(111)-1x1 surface. Our data confirm that such alloy phases exhibit distinct electronic features, which are discussed taking into account the properties calculated for related systems.