title: Supramolecular control of the magnetic anisotropy in two-dimensional high-spin Fe arrays at a metal interface.
abstract: Magnetic atoms at surfaces are a rich model system for solid-state magnetic bits exhibiting either classical or quantum behaviour. Individual atoms, however, are difficult to arrange in regular patterns. Moreover, their magnetic properties are dominated by interaction with the substrate, which, as in the case of Kondo systems, often leads to a decrease or quench of their local magnetic moment. Here, we show that the supramolecular assembly of Fe and 1,4-benzenedicarboxylic acid molecules on a Cu surface results in ordered arrays of high-spin mononuclear Fe centres on a 1.5 nm square grid. Lateral coordination with the molecular ligands yields unsaturated yet stable coordination bonds, which enable chemical modification of the electronic and magnetic properties of the Fe atoms independently from the substrate. The easy magnetization direction of the Fe centres can be switched by oxygen adsorption, thus opening a way to control the magnetic anisotropy in supramolecular layers akin to that used in metallic thin films.
authors.affiliation: Centre d'Investigacions en Nanociència i Nanotecnologia (ICN-CSIC), UAB Campus, E-08193 Barcelona, Spain. pietro.gambardella@icrea.es
authors.forename: Pietro
authors.initials: P
authors.lastname: Gambardella
authors.forename: Sebastian
authors.initials: S
authors.lastname: Stepanow
authors.forename: Alexandre
authors.initials: A
authors.lastname: Dmitriev
authors.forename: Jan
authors.initials: J
authors.lastname: Honolka
authors.forename: Frank M F
authors.initials: FM
authors.lastname: de Groot
authors.forename: Magalí
authors.initials: M
authors.lastname: Lingenfelder
authors.forename: Subhra
authors.initials: S
authors.lastname: Sen Gupta
authors.forename: D D
authors.initials: DD
authors.lastname: Sarma
authors.forename: Peter
authors.initials: P
authors.lastname: Bencok
authors.forename: Stefan
authors.initials: S
authors.lastname: Stanescu
authors.forename: Sylvain
authors.initials: S
authors.lastname: Clair
authors.forename: Stéphane
authors.initials: S
authors.lastname: Pons
authors.forename: Nian
authors.initials: N
authors.lastname: Lin
authors.forename: Ari P
authors.initials: AP
authors.lastname: Seitsonen
authors.forename: Harald
authors.initials: H
authors.lastname: Brune
authors.forename: Johannes V
authors.initials: JV
authors.lastname: Barth
authors.forename: Klaus
authors.initials: K
authors.lastname: Kern