6533b820fe1ef96bd1279caf
RESEARCH PRODUCT
Nonequilibrium magnetization dynamics of gadolinium studied by magnetic linear dichroism in time-resolved 4f core-level photoemission.
M. LisowskiR. SchmidtUwe BovensiepenH. Prima-garciaNadezhda M. BulgakovaCornelius GahlMartin WeineltAlexey MelnikovR. WeberGiessel Tsubject
Magnetization dynamicsMaterials scienceCondensed matter physicsScatteringGadoliniumFísicaPhysics::OpticsGeneral Physics and Astronomychemistry.chemical_elementCiència dels materialsLinear dichroismCondensed Matter::Materials SciencechemistryFerromagnetismCurie temperatureCondensed Matter::Strongly Correlated ElectronsValence electronExcitationdescription
The magnetic linear dichroism of the gadolinium 4f core level is studied in a time-resolved photoemission experiment employing laser pump- and synchrotron-radiation probe pulses. Upon optical excitation of the 5d6s valence electrons with femtosecond laser pulses, the magnetic order in the 4f spin system is reduced. Remarkably, the linear dichroism remains at 80% of the equilibrium contrast while the lattice temperature reaches the Curie temperature due to electron-phonon scattering. Contrasting itinerant ferromagnets, this shows that equilibration between the lattice and spin subsystems takes in Gd about 80 ps and is established in parallel with heat diffusion.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2008-01-01 | Physical review letters |