Nonequilibrium magnetization dynamics of gadolinium studied by magnetic linear dichroism in time-resolved 4f core-level photoemission
| Autor: | M. Lisowski, R. Schmidt, Uwe Bovensiepen, H. Prima-Garcia, Nadezhda M. Bulgakova, Cornelius Gahl, Martin Weinelt, Alexey Melnikov, R. Weber, Giessel T |
|---|---|
| Rok vydání: | 2007 |
| Předmět: |
Magnetization dynamics
Materials science Condensed matter physics Scattering Gadolinium Física Physics::Optics General Physics and Astronomy chemistry.chemical_element Ciència dels materials Linear dichroism Condensed Matter::Materials Science chemistry Ferromagnetism Curie temperature Condensed Matter::Strongly Correlated Electrons Valence electron Excitation |
| Zdroj: | Melnikov, A.; Prima García, Helena; Lisowski, M.; Gießel, T.; Weber, R.; Schmidt, R.; Gahl, C.; Bulgakova, N.M.; Bovensiepen, U.; Weinelt, M. (2008) Nonequilibrium Magnetization Dynamics of Gadolinium Studied by Magnetic Linear Dichroismin Time-Resolved 4f Core-Level Photoemission Physical Review Letters 100 10 107202-1 107202-4 RODERIC. Repositorio Institucional de la Universitat de Valéncia instname |
| ISSN: | 0031-9007 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|