title: Uniform magnetic properties for an ultrahigh-density lattice of noninteracting co nanostructures.
abstract: We report on the magnetic properties of two-dimensional Co nanoparticles arranged in macroscopically phase-coherent superlattices created by self-assembly on Au(788). Our particles have a density of 26 Tera/in2 (1 Tera=10(12)), are monodomain, and have uniaxial out-of-plane anisotropy. The distribution of the magnetic anisotropy energies has a half width at half maximum of 17%, a factor of 2 more narrow than the best results reported for superlattices of three-dimensional nanoparticles. Our data show the absence of magnetic interactions between the particles. Co/Au(788) thus constitutes an ideal model system to explore the ultimate density limit of magnetic recording.
authors.affiliation: Institut de Physique des Nanostructures, Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland.
authors.forename: N
authors.initials: N
authors.lastname: Weiss
authors.forename: T
authors.initials: T
authors.lastname: Cren
authors.forename: M
authors.initials: M
authors.lastname: Epple
authors.forename: S
authors.initials: S
authors.lastname: Rusponi
authors.forename: G
authors.initials: G
authors.lastname: Baudot
authors.forename: S
authors.initials: S
authors.lastname: Rohart
authors.forename: A
authors.initials: A
authors.lastname: Tejeda
authors.forename: V
authors.initials: V
authors.lastname: Repain
authors.forename: S
authors.initials: S
authors.lastname: Rousset
authors.forename: P
authors.initials: P
authors.lastname: Ohresser
authors.forename: F
authors.initials: F
authors.lastname: Scheurer
authors.forename: P
authors.initials: P
authors.lastname: Bencok
authors.forename: H
authors.initials: H
authors.lastname: Brune