Stable Cation Inversion at the MgAl2O4(100) Surface

Morten K. Rasmussen, Adam S. Foster, Berit Hinnemann, Filippo F. Canova, Stig Helveg, Kristoffer Meinander, Natalia M. Martin, Jan Knudsen, Alina Vlad, Edvin Lundgren, Andreas Stierle, Flemming Besenbacher, Jeppe V. Lauritsen

Tutkimustuotos: LehtiartikkeliArticleScientificvertaisarvioitu

39 Sitaatiot (Scopus)
32 Lataukset (Pure)

Abstrakti

From an interplay of atom-resolved noncontact atomic force microscopy, surface x-ray diffraction experiments, and density functional theory calculations, we reveal the detailed atomic-scale structure of the (100) surface of an insulating ternary metal oxide, MgAl2O4 (spinel). We surprisingly find that the MgAl2O4(100) surface is terminated by an Al and O-rich structure with a thermodynamically favored amount of Al atoms interchanged with Mg. This finding implies that so-called Mg-Al antisites, which are defects in the bulk of MgAl2O4, become a thermodynamically stable and integral part of the surface.
AlkuperäiskieliEnglanti
Artikkeli036102
Sivut1-4
JulkaisuPhysical Review Letters
Vuosikerta107
Numero3
DOI - pysyväislinkit
TilaJulkaistu - 2011
OKM-julkaisutyyppiA1 Julkaistu artikkeli, soviteltu

Tutkimusalat

  • AFM
  • Oxides

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