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Rare-earth surface alloying: A new phase for GdAu2

AutorCorso, M.; Verstraete, Matthieu J. ; Schiller, Frederik ; Fernández, Laura; Rubio, Angel; Ortega, J. Enrique
Fecha de publicación2010
EditorAmerican Physical Society
CitaciónPhysical Review Letters 105(11): 016101 (2010)
ResumenSurface alloying is a powerful way of varying physical and chemical properties of metals, for a number of applications from catalysis to nuclear and green technologies. Surfaces offer many degrees of freedom, giving rise to new phases that do not have a bulk counterpart. However, the atomic characterization of distinct surface compounds is a major task, which demands powerful experimental and theoretical tools. Here we illustrate the process for the case of a GdAu2 surface phase of extraordinary crystallinity. The combined use of surface-sensitive techniques and state-of-the-art ab initio calculations disentangles its atomic and electronic properties. In particular, the stacking of the surface layers allows for gadolinium’s natural ferromagnetic state, at variance with the bulk phase, where frustration leads to antiferromagnetic interlayer coupling.
Descripción4 páginas, 4 figuras.-- PACS numbers: 68.55.-a, 68.35.-p, 73.61.At, 81.05.Bx.-- et al.
Versión del editorhttp://dx.doi.org/10.1103/PhysRevLett.105.016101
URIhttp://hdl.handle.net/10261/44269
DOI10.1103/PhysRevLett.105.016101
ISSN0031-9007
E-ISSN1079-7114
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