Title of article :
Synthesis and structure of ordered stoichiometric Pt3Mn-based surface alloys
Author/Authors :
Gallego، نويسنده , , S. and Ocal، نويسنده , , C. and Méndez، نويسنده , , J. M. Torrelles، نويسنده , , X. and Soria، نويسنده , , F.، نويسنده ,
Issue Information :
هفته نامه با شماره پیاپی سال 2001
Abstract :
By annealing at 500°C thick deposits of Mn on Pt(1 1 1), a chemically ordered 2×2 surface compound is formed. From a dynamical low energy electron diffraction (LEED) analysis, it consists of a Pt3Mn(1 1 1) bulk-like structure covered by a Pt layer. A different layered structure of alternated Pt and Pt3Mn ordered planes is obtained by the same procedure using annealing temperatures of 650°C. The distinction between the two phases is based in measurements by LEED, STM and XRD. One phase evolves to the other via a progressive enrichment of Pt, while keeping the structure and composition of the two outermost layers as the temperature increases.
Keywords :
X-Ray scattering , surface segregation , surface structure , Manganese , Diffraction , Compound formation , Alloys , and topography , and reflection , Platinum , Roughness , Scanning tunneling microscopy , morphology , Low energy electron diffraction (LEED)
Journal title :
Surface Science
Journal title :
Surface Science
