Reversible enhancement of the magnetism of ultrathin Co films by H adsorption

S. Gallego, N. Sanchez, S. Martin, M. C. Muñoz, L. Szunyogh

Research output: Contribution to journalArticle

6 Citations (Scopus)


By means of ab initio calculations, we have investigated the effect of H adsorption on the structural, electronic, and magnetic properties of ultrathin Co films on Ru(0001). Our calculations predict that H occupies hollow sites preserving the two-dimensional threefold symmetry. The formation of a complete H overlayer leads to a very stable surface with strong H-Co bonds. H tends to suppress surface features, in particular, the enhancement of the magnetic moments of the bare film. The H-induced effects are mostly confined to the Co atoms bonded to H, independent of the H coverage or of the thickness and the structure of the Co film. However, for partial H coverages a significant increase occurs in the magnetic moment for the surface Co atoms not bonded to H, leading to a net enhancement of surface magnetism.

Original languageEnglish
Article number085414
JournalPhysical Review B - Condensed Matter and Materials Physics
Issue number8
Publication statusPublished - Aug 10 2010

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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