title: Linear and circularly polarized light to study anisotropy and resonant scattering in magnetic thin films.
abstract: The remarkable polarization properties of synchrotron light have lead to the advent of modern synchrotron-related spectroscopic studies with angular and/or magnetic selectivity. Here an overview is given of the prominent aspects of the polarization of the light delivered by a bending magnet, and some dichroic properties in X-ray absorption spectroscopy (XAS). Two studies developed at the Brazilian Synchrotron Light Laboratory are then reported, exemplifying the profit gained using linear and circular polarization of X-rays for the study of magnetic thin films and multilayers. Angle-resolved XAS was used in strained manganite thin films to certify a model of local distortion limited within the MnO6 polyhedron. A pioneering experience of X-ray magnetic scattering at grazing incidence associated with dispersive XAS in a Co/Gd multilayer draws new perspectives for magnetic studies in thin films and multilayers under atmospheric conditions in the hard X-ray range.
authors.affiliation: Laboratório Nacional de Luz Síncrotron, CP 6192, 13084-971, Campinas, SP, Brazil. helio@lnls.br
authors.forename: Hélio C N
authors.initials: HC
authors.lastname: Tolentino
authors.forename: Júlio C
authors.initials: JC
authors.lastname: Cezar
authors.forename: Narcizo M
authors.initials: NM
authors.lastname: Souza-Neto
authors.forename: Aline Y
authors.initials: AY
authors.lastname: Ramos