title: Lattice Dynamics of EuO: Evidence for Giant Spin-Phonon Coupling.
abstract: Comprehensive studies of lattice dynamics in the ferromagnetic semiconductor EuO have been performed by a combination of inelastic x-ray scattering, nuclear inelastic scattering, and ab initio calculations. A remarkably large broadening of the transverse acoustic phonons was discovered at temperatures above and below the Curie temperature T_{C}=69  K. This result indicates a surprisingly strong momentum-dependent spin-phonon coupling induced by the spin dynamics in EuO.
authors.affiliation: Laboratory for Applications of Synchrotron Radiation, Karlsruhe Institute of Technology, D-76131 Karlsruhe, Germany.|Institute for Photon Science and Synchrotron Radiation, Karlsruhe Institute of Technology, D-76344 Eggenstein-Leopoldshafen, Germany.
authors.forename: R
authors.initials: R
authors.lastname: Pradip
authors.affiliation: Institute of Nuclear Physics, Polish Academy of Sciences, PL-31342 Kraków, Poland.
authors.forename: P
authors.initials: P
authors.lastname: Piekarz
authors.affiliation: ESRF-The European Synchrotron, F-38000 Grenoble, France.
authors.forename: A
authors.initials: A
authors.lastname: Bosak
authors.affiliation: ESRF-The European Synchrotron, F-38000 Grenoble, France.
authors.forename: D G
authors.initials: DG
authors.lastname: Merkel
authors.affiliation: Laboratory for Applications of Synchrotron Radiation, Karlsruhe Institute of Technology, D-76131 Karlsruhe, Germany.|Institute for Photon Science and Synchrotron Radiation, Karlsruhe Institute of Technology, D-76344 Eggenstein-Leopoldshafen, Germany.
authors.forename: O
authors.initials: O
authors.lastname: Waller
authors.affiliation: Laboratory for Applications of Synchrotron Radiation, Karlsruhe Institute of Technology, D-76131 Karlsruhe, Germany.|Institute for Photon Science and Synchrotron Radiation, Karlsruhe Institute of Technology, D-76344 Eggenstein-Leopoldshafen, Germany.
authors.forename: A
authors.initials: A
authors.lastname: Seiler
authors.affiliation: ESRF-The European Synchrotron, F-38000 Grenoble, France.
authors.forename: A I
authors.initials: AI
authors.lastname: Chumakov
authors.affiliation: ESRF-The European Synchrotron, F-38000 Grenoble, France.
authors.forename: R
authors.initials: R
authors.lastname: Rüffer
authors.affiliation: Max-Planck-Institut für Festkörperforschung, D-70569 Stuttgart, Germany.|Marian Smoluchowski Institute of Physics, Jagiellonian University, PL-30348 Kraków, Poland.
authors.forename: A M
authors.initials: AM
authors.lastname: Oleś
authors.affiliation: Institute of Nuclear Physics, Polish Academy of Sciences, PL-31342 Kraków, Poland.
authors.forename: K
authors.initials: K
authors.lastname: Parlinski
authors.affiliation: ESRF-The European Synchrotron, F-38000 Grenoble, France.
authors.forename: M
authors.initials: M
authors.lastname: Krisch
authors.affiliation: Laboratory for Applications of Synchrotron Radiation, Karlsruhe Institute of Technology, D-76131 Karlsruhe, Germany.|Institute for Photon Science and Synchrotron Radiation, Karlsruhe Institute of Technology, D-76344 Eggenstein-Leopoldshafen, Germany.|ANKA, Karlsruhe Institute of Technology, D-76344 Eggenstein-Leopoldshafen, Germany.
authors.forename: T
authors.initials: T
authors.lastname: Baumbach
authors.affiliation: Laboratory for Applications of Synchrotron Radiation, Karlsruhe Institute of Technology, D-76131 Karlsruhe, Germany.|Institute for Photon Science and Synchrotron Radiation, Karlsruhe Institute of Technology, D-76344 Eggenstein-Leopoldshafen, Germany.
authors.forename: S
authors.initials: S
authors.lastname: Stankov