Berlin 2018 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 6: Ultrafast magnetism I
MA 6.12: Vortrag
Montag, 12. März 2018, 12:30–12:45, EB 407
Laser-induced spin currents in nonhomogeneous magnetic systems — •Pavel Baláž1,2, Karel Carva1, Pablo Maldonado3, and Peter M. Oppeneer3 — 1Charles University, Faculty of Mathematics and Physics, Department of Condensed Matter Physics, Ke Karlovu 5, CZ 121 16 Prague, Czech Republic — 2IT4Innovations Center, VSB-TU Ostrava, 17.listopadu 15, CZ 70833 Ostrava, Czech Republic — 3Uppsala University, Dept. of Physics and Astronomy, Box 530, S-751 21 Uppsala, Sweden
Laser-induced ultrafast demagnetization of transition metals and their alloys is accompanied by generation of spin current of hot electrons which diffuses along the sample. This process is well described by superdiffusive spin transport, which can be applied to a multilayer structure consisted of ferromagnetic (F) and nonmagnetic (N) metallic layers [1]. Recently, a model of spin transfer torque for a F/N/F trilayer with perpendicular magnetizations has been developed [2].
Here, laser-induced processes in magnetic textures like domain walls shall be studied. First, we shall analyze how ultrafast demagnetization influences the domain wall structure. Second, we shall study how spin currents arise in the vicinity of the spin texture.
[1] M. Battiato, K. Carva, P. Oppeneer Phys. Rev. Lett. 105, 027203 (2010).
[2] P. Baláž, M. Žonda, K. Carva, P. Maldonado, P. M. Oppeneer, arXiv:1710.02083 [cond-mat.mes-hall] (2017).