title: Bistable coupling states measured on single Co nanoclusters deposited on CoO(111).
abstract: We describe novel features of the induced magnetic anisotropy in Co nanoclusters coupled with a CoO(111) layer. Individual cluster magnetism was studied using new microbridge superconducting quantum interference devices. Intrinsically, the Co clusters are single domains with an effective anisotropy constant K(F)≈1.5×10(6) erg·cm(-3). A bistable state of the ferromagnetic-antiferromagnetic coupling is revealed, with a maximum bias systematically observed along CoO[10 ̅1] and an interfacial coupling energy of 0.9 erg·cm(-2). The small bias observed in cluster assembly results from an averaging over the two opposite stable states.
authors.affiliation: Department of Physics and Astronomy and Nebraska Center for Materials Nanoscience, University of Nebraska-Lincoln, Nebraska 68588, USA. damien.le-roy@hotmail.fr
authors.forename: D
authors.initials: D
authors.lastname: Le Roy
authors.forename: R
authors.initials: R
authors.lastname: Morel
authors.forename: S
authors.initials: S
authors.lastname: Pouget
authors.forename: A
authors.initials: A
authors.lastname: Brenac
authors.forename: L
authors.initials: L
authors.lastname: Notin
authors.forename: T
authors.initials: T
authors.lastname: Crozes
authors.forename: W
authors.initials: W
authors.lastname: Wernsdorfer