Regensburg 2016 – scientific programme
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MA: Fachverband Magnetismus
MA 30: Spin-Torque Phenomena
MA 30.9: Talk
Wednesday, March 9, 2016, 12:15–12:30, H33
Spin pumping into high conductivity polymers — •Mohammad Qaid1, Tim Richter1, Christoph Hauser1, and Georg Schmidt1,2 — 1Institut für Physik, Martin-Luther-Universität Halle-Wittenberg,Von-Danckelmann-Platz 3, 06120Halle — 2Interdisziplinäres Zentrum für Materialwissenschaften, Martin-Luther-Universität Halle-Wittenberg, Heinrich Damerow Straße 4, 06120 Halle
Conducting polymers seem ideal candidates for application as spin charge converters using the inverse spin-Hall-effect, as they are flexible, easy to apply and can be obtained at low cost. Recently, the ISHE has been demonstrated in poly (3,4-ethylenedioxythiophene): poly(styrenesulfonate) (PEDOT:PSS) [1]. We have studied spin pumping and ISHE in hybrid structures composed of thin film yttrium-iron garnet (YIG) and PEDOT:PSS of various conductivities which can be varied by doping with high boiling solvents. The spin pumping is studied using the uniform mode of the ferromagnetic resonance but also for different magnon modes which can be excited in the experiment. As we show in our results using PEDOT:PSS leads to additional damping most likely due to spin pumping, however extreme care must be taken to distinguish between the real effects and side effects like damping by eddy currents or thermovoltages which can be much bigger than the inverse spin-Hall effect.
References: [1]- K. Ando, S.Watanabe, S.Mooser, E. Saitoh, and H. Sirringhaus, Nat. Mater. 12, 622 (2013)