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Title: Competition between elastic and chemical effects in the intermixing of Co and Ag on Rh(111)
Authors: Imam, Mighfar
Marathe, Madhura
Narasimhan, Shobhana
Keywords: Surface alloys
reduced coordination
Issue Date: Nov-2008
Publisher: Indian Academy of Sciences
Citation: Journal of Chemical Sciences 120(6), 621-626 (2008)
Abstract: We have performed ab initio density functional theory calculations to investigate the formation energy and the effects of low dimensionality and reduced coordination on the magnetic properties of pseudomorphically grown monolayers of Co-Ag surface alloys on a Rh(111) substrate. We find that if such an alloy could form, its magnetic moment would be considerably enhanced relative to that of bulk Co. However, we also find that its formation is energetically disfavoured against phase-segregated forms; this can be mainly attributed to the high 'chemical' cost of forming Ag-Co bonds. Trends in the variation of magnetic moment with alloy composition are largely consistent with the Stoner argument
Description: Open Access
Other Identifiers: 0253-4134
Appears in Collections:Research Articles (Shobhana Narasimhan)

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