Regensburg 2013 – wissenschaftliches Programm
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DF: Fachverband Dielektrische Festkörper
DF 22: Poster II
DF 22.47: Poster
Freitag, 15. März 2013, 10:30–13:30, Poster D
Inverse Spin Hall Effect in Ni80Fe20 / Normal Metal Bilayers — •Martin Obstbaum, Markus Härtinger, Thomas Meier, Fabian Swientek, Christian H. Back, and Georg Woltersdorf — Institut für Experimentelle und Angewandte Physik, Universität Regensburg,93040 Regensburg, Germany
We investigate the inverse spin Hall effect in Ni80Fe20/normal metal bilayers. Pure spin currents are generated by spin pumping at ferromagnetic resonance and a dc-voltage is measured in the plane of the bilayer system. For Pt and Au as normal metals the observed inverse spin Hall effect and the corresponding spin Hall angle are consistent with literature values. In the case of Ni80Fe20/Ta - bilayers a giant spin Hall angle has recently been reported [1], however, we do not detect a measurable voltage due to the inverse spin Hall effect in Ni80Fe20/Ta bilayers. In fact, from our angle and temperature dependent measurements we conclude that for Ni80Fe20/Ta bilayers the voltage generated at ferromagnetic resonance is solely a consequence of the anisotropic magnetoresistance.
[1] Liu et al. Science 336, 555 (2012)