SKM 2023 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 20: Spintronics (other effects)
MA 20.7: Vortrag
Dienstag, 28. März 2023, 16:45–17:00, HSZ 401
Spin-mixing states at finite temperature — •Danny Thonig1,2, Simon Streib2, Ramon Cardias3, Sumanta Bhandary4, Yaroslav Kvashnin2, and Olle Eriksson2,1 — 1Örebro University, Sweden — 2University Uppsala, Sweden — 3KTH Royal Institute of Technology, Sweden — 4Trinity College Dublin, The University of Dublin, Ireland
In spintronics, the electron spins are used as information carriers and, thus, the description of spin relaxation is of fundamental relevance. Spin relaxation characterises how rapidly the non-equilibrium spin population decays due to spin mixing [1], which wise versa depends on the magnetic moment length and on the temperature simulated by disorder acting on the magnetic state. But the latter phenomenons is barely understood.
We quantify the presence of spin-mixed states in spin and lattice disordered magnetic 3d transition metals by calculating the Elliot-Yafet spin-mixing parameter b2. Here, we are using a self-consistent, relativistic, Slater-Koster parametrized tight-binding electronic structure model.
We, first, compare our results of the collinear order in itinerant magnets with density functional theory calculations and experiment. After, we analyse b2 at finite temperature, finding a drastic increase by a factor >10. This can be understood since both spin orbit coupling and disorder have a similar impact on the electronic potential [2].
[1] D. Steiauf et al., Phys. Rev. B 79 140401 (2009)
[2] L. Nordström et al., Phys. Rev. Lett. 76 4420 (1996)