COMPARING SEGREGATION PROFILES OFSnANDSbIN SINGLE AND POLYCRYSTALLINECu

J. K. O. Asante () and W. D. Roos
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J. K. O. Asante: Department of Physics, Tshwane University of Technology, Pretoria, South Africa
W. D. Roos: Department of Physics, University of the Free State, Bloemfontein, South Africa

Surface Review and Letters (SRL), 2012, vol. 19, issue 01, 1-4

Abstract: The kinetics as well as the equilibrium segregation profiles of very low concentrations ofSn(0.14 at.%) andSb(0.12 at.%) in a polycrystallineCusample were measured by Auger electron spectroscopy. These profiles were compared to those from aCu(100),Sb,Snternary single crystal which was subjected to the same experimental conditions. The results are explained in terms of solute segregation to grain boundaries and surface interfaces. The comparison also indicate that not only bulk diffusion, interactions and segregation energies play a role in the surface enrichment of the species, but in polycrystalline samples, the doping order of the specimen is to be considered as well. The differences in interaction energies ofSnandSbalso suggest an indirect method of measuring the concentrations of nonsegregating impurities in polycrystalline samples.

Keywords: Segregation parameters; Auger electron spectroscopy; Cusingle and polycrystalline; SnandSb (search for similar items in EconPapers)
Date: 2012
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DOI: 10.1142/S0218625X12500060

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