We report on the unusual behavior of Fe(n) clusters (n <= 6) supported on ultrathin oxide films. When the film is grown on a Mo(001) support, the cluster magnetic moments exhibit a similar quenching as on the bare MgO(001) surface while on MgO/Fe(001) films the magnetization is enhanced due to a charge transfer from the Fe clusters to the MgO/Fe(001) interface. These results obtained using a spin-polarize density functional approach show the potential of using ultrathin films to tune the properties of supported magnetic particles.
MARTINEZ POZZONI, U., Pacchioni, G., Illas, F. (2009). Enhanced magnetic moments of Fe clusters supported on MgO/Fe(001) ultrathin films. THE JOURNAL OF CHEMICAL PHYSICS, 130(18), 184711 [10.1063/1.3132768].
Enhanced magnetic moments of Fe clusters supported on MgO/Fe(001) ultrathin films
MARTINEZ POZZONI, UMBERTO LUIGI;PACCHIONI, GIANFRANCO;
2009
Abstract
We report on the unusual behavior of Fe(n) clusters (n <= 6) supported on ultrathin oxide films. When the film is grown on a Mo(001) support, the cluster magnetic moments exhibit a similar quenching as on the bare MgO(001) surface while on MgO/Fe(001) films the magnetization is enhanced due to a charge transfer from the Fe clusters to the MgO/Fe(001) interface. These results obtained using a spin-polarize density functional approach show the potential of using ultrathin films to tune the properties of supported magnetic particles.
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