title: Optical detection of spin transport in nonmagnetic metals.
abstract: We determine the dynamic magnetization induced in nonmagnetic metal wedges composed of silver, copper, and platinum by means of Brillouin light scattering microscopy. The magnetization is transferred from a ferromagnetic Ni80Fe20 layer to the metal wedge via the spin pumping effect. The spin pumping efficiency can be controlled by adding an insulating interlayer between the magnetic and nonmagnetic layer. By comparing the experimental results to a dynamical macroscopic spin-transport model we determine the transverse relaxation time of the pumped spin current which is much smaller than the longitudinal relaxation time.
authors.affiliation: Fachbereich Physik and Forschungszentrum OPTIMAS, Technische Universität Kaiserslautern, Kaiserslautern, Germany.
authors.forename: F
authors.initials: F
authors.lastname: Fohr
authors.forename: S
authors.initials: S
authors.lastname: Kaltenborn
authors.forename: J
authors.initials: J
authors.lastname: Hamrle
authors.forename: H
authors.initials: H
authors.lastname: Schultheiss
authors.forename: A A
authors.initials: AA
authors.lastname: Serga
authors.forename: H C
authors.initials: HC
authors.lastname: Schneider
authors.forename: B
authors.initials: B
authors.lastname: Hillebrands
authors.forename: Y
authors.initials: Y
authors.lastname: Fukuma
authors.forename: L
authors.initials: L
authors.lastname: Wang
authors.forename: Y
authors.initials: Y
authors.lastname: Otani