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Structure determination of the Cu(100)c(2x2)-Mn and Cu(100)c(2x2)-Au surface alloy phases by medium-energy ion scattering

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UNSPECIFIED (1999) Structure determination of the Cu(100)c(2x2)-Mn and Cu(100)c(2x2)-Au surface alloy phases by medium-energy ion scattering. JOURNAL OF PHYSICS-CONDENSED MATTER, 11 (8). pp. 1889-1901. ISSN 0953-8984.

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Abstract

The substitutional surface alloy phases Cu(100)c(2 x 2)-Mn and Cu(100)c(2 x 2)Au have been investigated by medium-energy ion scattering (MEIS) using 100 keV H+ ions. Blocking patterns in the scattered ion yield have been measured for [(111) over bar] [<(12)over bar0>] and [<(13)over bar0>] incidence geometries. Simulations of these blocking patterns have been performed for a range of trial structures and the optimum values of the structural parameters obtained are compared with those available from earlier low-energy electron diffraction (LEED) and photoelectron diffraction (PhD) investigations. The MEIS results confirm the presence of rumpling in the outermost alloy layer, with corrugation amplitudes of 0.37 +/- 0.06 Angstrom and 0.06 +/- 0.04 Angstrom for the CuMn and CuAu surface alloys respectively. This result supports the previously reported anomalously large corrugation for Cu(100)c(2 x 2)-Mn which has been attributed to the local high-spin state of the Mn atoms.

Item Type: Journal Article
Subjects: Q Science > QC Physics
Journal or Publication Title: JOURNAL OF PHYSICS-CONDENSED MATTER
Publisher: IOP PUBLISHING LTD
ISSN: 0953-8984
Official Date: 1 March 1999
Dates:
DateEvent
1 March 1999UNSPECIFIED
Volume: 11
Number: 8
Number of Pages: 13
Page Range: pp. 1889-1901
Publication Status: Published

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