title: Geometrical Effects on the Magnetic Properties of Nanoparticles.
abstract: Elucidating the connection between shape and properties is a challenging but essential task for a rational design of nanoparticles at the atomic level. As a paradigmatic example we investigate how geometry can influence the magnetic properties of nanoparticles, focusing in particular on platinum clusters of 1-2 nm in size. Through first-principle calculations, we have found that the total magnetization depends strongly on the local atomic arrangements. This is due to a contraction of the nearest neighbor distance together with an elongation of the second nearest neighbor distance, resulting in an interatomic partial charge transfer from the atoms lying on the subsurface layer (donors) toward the vertexes (acceptors).
authors.affiliation: Department of Physics, King's College London , WC2R 2LS, London, United Kingdom.|Department of Earth Sciences, University College London , WC1E 6BT, London, United Kingdom.
authors.forename: Cono
authors.initials: C
authors.lastname: Di Paola
authors.affiliation: Department of Physics, King's College London , WC2R 2LS, London, United Kingdom.|Nano-bio Spectroscopy Group and ETSF, Universidad del País Vasco , CFM CSIC-UPV/EHU, E-20018 San Sebastián, Spain.|Ikerbasque, Basque Foundation for Science, E-48013, Bilbao, Spain.
authors.forename: Roberto
authors.initials: R
authors.lastname: D'Agosta
authors.affiliation: Department of Physics, King's College London , WC2R 2LS, London, United Kingdom.
authors.forename: Francesca
authors.initials: F
authors.lastname: Baletto
keywords: Platinum; deformation; geometry; magnetism; nanoclusters