title: Femtosecond X-ray magnetic circular dichroism absorption spectroscopy at an X-ray free electron laser.
abstract: X-ray magnetic circular dichroism spectroscopy using an X-ray free electron laser is demonstrated with spectra over the Fe L(3,2)-edges. The high brightness of the X-ray free electron laser combined with high accuracy detection of incident and transmitted X-rays enables ultrafast X-ray magnetic circular dichroism studies of unprecedented sensitivity. This new capability is applied to a study of all-optical magnetic switching dynamics of Fe and Gd magnetic sublattices in a GdFeCo thin film above its magnetization compensation temperature.
authors.affiliation: SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, USA.
authors.forename: Daniel J
authors.initials: DJ
authors.lastname: Higley
authors.affiliation: SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, USA.
authors.forename: Konstantin
authors.initials: K
authors.lastname: Hirsch
authors.affiliation: SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, USA.
authors.forename: Georgi L
authors.initials: GL
authors.lastname: Dakovski
authors.affiliation: SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, USA.
authors.forename: Emmanuelle
authors.initials: E
authors.lastname: Jal
authors.affiliation: SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, USA.
authors.forename: Edwin
authors.initials: E
authors.lastname: Yuan
authors.affiliation: SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, USA.
authors.forename: Tianmin
authors.initials: T
authors.lastname: Liu
authors.affiliation: SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, USA.
authors.forename: Alberto A
authors.initials: AA
authors.lastname: Lutman
authors.affiliation: SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, USA.
authors.forename: James P
authors.initials: JP
authors.lastname: MacArthur
authors.affiliation: Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA.
authors.forename: Elke
authors.initials: E
authors.lastname: Arenholz
authors.affiliation: SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, USA.
authors.forename: Zhao
authors.initials: Z
authors.lastname: Chen
authors.affiliation: SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, USA.
authors.forename: Giacomo
authors.initials: G
authors.lastname: Coslovich
authors.affiliation: Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA.
authors.forename: Peter
authors.initials: P
authors.lastname: Denes
authors.affiliation: SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, USA.
authors.forename: Patrick W
authors.initials: PW
authors.lastname: Granitzka
authors.affiliation: SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, USA.
authors.forename: Philip
authors.initials: P
authors.lastname: Hart
authors.affiliation: SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, USA.
authors.forename: Matthias C
authors.initials: MC
authors.lastname: Hoffmann
authors.affiliation: Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA.
authors.forename: John
authors.initials: J
authors.lastname: Joseph
authors.affiliation: SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, USA.
authors.forename: Loïc
authors.initials: L
authors.lastname: Le Guyader
authors.affiliation: SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, USA.
authors.forename: Ankush
authors.initials: A
authors.lastname: Mitra
authors.affiliation: SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, USA.
authors.forename: Stefan
authors.initials: S
authors.lastname: Moeller
authors.affiliation: SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, USA.
authors.forename: Hendrik
authors.initials: H
authors.lastname: Ohldag
authors.affiliation: SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, USA.
authors.forename: Matthew
authors.initials: M
authors.lastname: Seaberg
authors.affiliation: Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA.
authors.forename: Padraic
authors.initials: P
authors.lastname: Shafer
authors.affiliation: SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, USA.
authors.forename: Joachim
authors.initials: J
authors.lastname: Stöhr
authors.affiliation: Department of Electronics and Computer Science, Nihon University, 7-24-1 Narashino-dai Funabashi, Chiba 274-8501, Japan.
authors.forename: Arata
authors.initials: A
authors.lastname: Tsukamoto
authors.affiliation: SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, USA.
authors.forename: Heinz-Dieter
authors.initials: HD
authors.lastname: Nuhn
authors.affiliation: SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, USA.
authors.forename: Alex H
authors.initials: AH
authors.lastname: Reid
authors.affiliation: SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, USA.
authors.forename: Hermann A
authors.initials: HA
authors.lastname: Dürr
authors.affiliation: SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, USA.
authors.forename: William F
authors.initials: WF
authors.lastname: Schlotter