Regensburg 2016 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 35: Spin dependent Transport Phenomena
MA 35.12: Vortrag
Mittwoch, 9. März 2016, 18:00–18:15, H33
Investigation of ac currents and spin excitations triggered by dynamical Hall effects — •Filipe Souza Mendes Guimarães1, Manuel dos Santos Dias1, Antonio Tavares da Costa Jr2, Roberto Bechara Muniz2, and Samir Lounis1 — 1Peter Grünberg Institut and Institute for Advanced Simulation, Forschungszentrum Jülich and JARA, 52425 Jülich, Germany — 2Universidade Federal Fluminense, Niterói, Brazil
Hall effects involving the interchange of charge, spin and orbital angular momentum may be used to excite and measure properties of nanostructures. Present theoretical descriptions of these effects ignore the dynamical character of the transport and excitation processes. We demonstrate, in a fully quantum mechanical and dynamical approach, how ferromagnetic and antiferromagnetic resonances can be excited by dynamical spin accumulations induced by the ac spin Hall effect in Fe/W bilayers and Fe/W/Fe trilayers. [1] Moreover, focusing on Co/Pt bilayers, we explore how intrinsic dynamical anomalous Hall effect, planar Hall effect and anisotropic magnetoresistance can be seen in a unified picture.
We acknowledge funding from CAPES (Brazil), Alexander von Humboldt foundation (Germany) and HGF-YIG Programme VH-NG-717 (Funsilab).
[1] F. S. M. Guimarães, S. Lounis, A. T. Costa, and R. B. Muniz, accepted in PRB: Rapid Communications, (2015). [arXiv:1509.04599]