Regensburg 2019 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 26: Spin dynamics and transport

MA 26.3: Vortrag

Mittwoch, 3. April 2019, 10:00–10:15, H37

Hybrid simulation of nonequilibrium spin dynamics — •Johan Briones, Sebastian Weber, Christopher Seibel, Sanjay Ashok, and Baerbel Rethfeld — Department of Physics and Optimas Rearch Center, TU Kaiserslautern, Germany

The complex phenomenon arising after a magnetic film has been excited by a femtosecond laser pulse is studied using a hybrid model (similar to [1]). It consists of a combination of two methods: A Monte Carlo model and the muT model [2]. The former will trace individual high energy nonequilibrium electrons [3], including spin-dependent scattering processes and spin-flip probabilities. The latter, will treat the low energy electrons as an ensemble, tracing their temperature and chemical potential. The magnetization dynamics will be investigated by using a two-band dynamic model which will be first applied to the case of Nickel.

The long-term perspective of this project is to develop a model that can describe the non-equilibrium transport and its effect on magnetization dynamics.

[1]N. Medvedev et al., New J. Phys, 15, 015016 (2013).

[2]B. Y. Mueller and B. Rethfeld, Phys. Rev. B, 90, 144420 (2014).

[3]K. Huthmacher et al., Physica A, 429, 241-251 (2015).