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MA: Fachverband Magnetismus

MA 46: Poster II

MA 46.55: Poster

Thursday, March 21, 2024, 15:00–18:00, Poster C

Influence of transport mechanisms and film thickness on ultrafast magnetization dynamics and generation of spin-resolved charge currents — •Sanjay Ashok, Christopher Seibel, Sebastian T. Weber, and Baerbel Rethfeld — Department of Physics and Research Center OPTIMAS, RPTU Kaiserslautern-Landau

Generation of spin-resolved charge-currents and pure spin-currents in sub-picosecond timescales are pertinent to understand and employ ultrafast transport phenomena in spintronic device concepts. In this work we study the influence of transport mechanisms and film thickness on ultrafast magnetization dynamics using the thermodynamic μT model [1]. We also study the generation of spin-resolved charge currents as well as pure-spin currents in metallic ferromagnets.

We seperately simulate the influence of thermal-conductivity, electrical-conductivity, Seebeck effect and Peltier effect on ultrafast magnetization dynamics. We then study spin-resolved charge-currents and pure spin-currents at various depths of the material. We compare their relative magnitudes in Nickel films with various thicknesses.

Our simulations provide a framework to study the relative roles of various transport mechanisms in generation of ultrafast currents.

[1] Ashok et al. APL, 120 142402 (2022)

Keywords: Ultrafast Magnetization Dynamics; Spin Currents; Heat Transport; Spin Transport