Regensburg 2016 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 31: Magnetization and Demagnetization Dynamics II

MA 31.5: Vortrag

Mittwoch, 9. März 2016, 10:30–10:45, H34

Light-induced magnetization dynamics in a ferromagnetic Rashba-model — •Christiane Scholl, Svenja Vollmar, and Hans Christian Schneider — TU Kaiserslautern, Department of Physics

We numerically investigate magnetization dynamics in a model system of a (mean-field) Rashba-ferromagnet due to non-resonant polarized optical fields. Electron-electron-scattering processes are taken into consideration by means of a modified relaxation-time approximation. Within the framework of this model, we show in microscopic detail how the magnetization dynamics is determined by the polarization direction of the electric field, which can result in a switching of the magnetization. We compare our results with two different models in the literature: inverse-Faraday effect [1] and spin-selective optical Stark effect [2].

[1] D. Popova, A. Bringer, S. Blügel, Phys. Rev. B 85, 094419 (2012)

[2] A. Qaiumzadeh, G. Bauer, A. Brataas, Phys. Rev. B 88,064416 (2013)