title: Polarized neutron reflectivity from monolayers of self-assembled magnetic nanoparticles.
abstract: We prepared monolayers of iron oxide nanoparticles via self-assembly on a bare silicon wafer and on a vanadium film sputter deposited onto a plane sapphire substrate. The magnetic configuration of nanoparticles in such a dense assembly was investigated by polarized neutron reflectivity. A theoretical model fit shows that the magnetic moments of nanoparticles form quasi domain-like configurations at remanence. This is attributed to the dipolar coupling amongst the nanoparticles.
authors.affiliation: Institute for Experimental Condensed Matter Physics, Ruhr-University Bochum, D-44780 Bochum, Germany.
authors.forename: D
authors.initials: D
authors.lastname: Mishra
authors.forename: O
authors.initials: O
authors.lastname: Petracic
authors.forename: A
authors.initials: A
authors.lastname: Devishvili
authors.forename: K
authors.initials: K
authors.lastname: Theis-Bröhl
authors.forename: B P
authors.initials: BP
authors.lastname: Toperverg
authors.forename: H
authors.initials: H
authors.lastname: Zabel