Surface core level spectroscopy of the Pt25Co75 (110) and (100) alloy surfaces
نویسندگان
چکیده
Core level photoemission spectroscopy of the Pt 4f7/2 level is used to investigate the surface and bulk Pt environments in the disordered alloy Pt25Co75. For the (1 10) face no Pt is observed at the surface, and only a single Pt bulk site is identified with a chemical shift of 250meV. For the denser (100) face the same bulk site is observed together with a surface peak, corresponding to a surface layer with Pt enrichment. The chemical shift at the surface is weaker than in the bulk.
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تاریخ انتشار 2017