title: On the interface magnetism of thin oxidized Co films: orbital and spin moments.
abstract: An x-ray magnetic circular dichroism study of a polycrystalline Co/CoO bilayer is presented. Using both the chemical specificity and surface sensitivity in the core level techniques, we find that uncompensated Co(2+) spin moments participate in the remanent ferromagnetic response of the bilayer that has oxygen nearest neighbors. These are likely located at the Co/CoO interface. As intermixing of magnetic species is not present in Co/CoO, it is concluded that the observed interface moments are due to interface roughness. Given their direction, these moments appear to not directly correlate to the exchange bias in these bilayers.
authors.affiliation: Department of Physics, Uppsala University, Box 530, 751 21 Uppsala, Sweden. Department of Imaging and Applied Physics, Curtin University of Technology, Perth, WA 6845, Australia. The Bragg Institute, Australian Nuclear Science and Technology Organization, Lucas Heights, NSW 2234, Australia.
authors.forename: A M
authors.initials: AM
authors.lastname: Mulders
authors.forename: H
authors.initials: H
authors.lastname: Loosvelt
authors.forename: A
authors.initials: A
authors.lastname: Fraile Rodríguez
authors.forename: E
authors.initials: E
authors.lastname: Popova
authors.forename: T
authors.initials: T
authors.lastname: Konishi
authors.forename: K
authors.initials: K
authors.lastname: Temst
authors.forename: O
authors.initials: O
authors.lastname: Karis
authors.forename: D
authors.initials: D
authors.lastname: Arvanitis
authors.forename: C
authors.initials: C
authors.lastname: Van Haesendonck