title: Optical magnetic circular dichroism in threshold photoemission from a magnetite thin film.
abstract: Threshold photoemission excited by polarization-modulated ultraviolet femtosecond laser light is exploited for phase-sensitive detection of magnetic circular dichroism (MCD) for a magnetite thin film. Magnetite (Fe(3)O(4)) shows a magnetic circular dichroism of ∼(4.5 ± 0.3) × 10(-3) for perpendicularly incident circularly polarized light and a magnetization vector switched parallel and antiparallel to the helicity vector by an external magnetic field. The asymmetry in threshold photoemission is discussed in comparison to the magneto-optical Kerr effect. The optical MCD contrast in threshold photoemission will provide a basis for future laboratory photoemission studies on magnetic surfaces.
authors.affiliation: Institut für Physik, Johannes Gutenberg-Universität, Staudinger Weg 7, D-55128 Mainz, Germany.
authors.forename: K
authors.initials: K
authors.lastname: Hild
authors.forename: J
authors.initials: J
authors.lastname: Maul
authors.forename: T
authors.initials: T
authors.lastname: Meng
authors.forename: M
authors.initials: M
authors.lastname: Kallmayer
authors.forename: G
authors.initials: G
authors.lastname: Schönhense
authors.forename: H J
authors.initials: HJ
authors.lastname: Elmers
authors.forename: R
authors.initials: R
authors.lastname: Ramos
authors.forename: S K
authors.initials: SK
authors.lastname: Arora
authors.forename: I V
authors.initials: IV
authors.lastname: Shvets