title: Enhanced magnetic moments of Fe clusters supported on MgO/Fe(001) ultrathin films.
abstract: We report on the unusual behavior of Fe(n) clusters (n < or = 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-polarized density functional approach show the potential of using ultrathin films to tune the properties of supported magnetic particles.
authors.affiliation: Dipartimento di Scienza dei Materiali, Università di Milano-Bicocca, via R. Cozzi 53, 20125 Milano, Italy.
authors.forename: Umberto
authors.initials: U
authors.lastname: Martinez
authors.forename: Gianfranco
authors.initials: G
authors.lastname: Pacchioni
authors.forename: Francesc
authors.initials: F
authors.lastname: Illas