Dresden 2017 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 54: Spin Hall Effects and Skyrmions II
MA 54.9: Vortrag
Donnerstag, 23. März 2017, 17:15–17:30, HSZ 04
Spin Pumping And Inverse Spin-Hall Effect In PEDOT:PSS — •Mohammad Qaid1, Tim Richter1, Alexander Müller1, Christoph Hauser1, and Georg Schmidt1,2 — 1Institut für Physik, Martin-Luther-Universität Halle-Wittenberg, Von-Danckelmann-Platz 3, 06120 Halle — 2Interdisziplinäres Zentrum für Materialwissenschaften, Martin-Luther-Universität Halle-Wittenberg, Heinrich Damerow Straße 4, 06120 Halle
Recently the inverse spin-Hall effect in conducting polymers was measured [1,2]. Here we present a study of spin pumping and ISHE in hybrid structures composed of thin film yttrium-iron garnet (YIG) and PEDOT:PSS and Pt contacts. Our experiments indicate an ISHE indeed exists but is much smaller than previously published. Control experiments show that spin pumping through the PEDOT:PSS can be highly efficient and massive artifacts can occur due to ISHE in the electrical contacts. Large magnon propagation lengths in the YIG can induce spin pumping far away from the excitation source and underneath the contacts. Only for dedicated geometries it is possible to prevent these artifacts and to quantify the ISHE in the conducting polymer. We will discuss the ISHE and also strategies to avoid a number of highly relevant artefacts which have exactly the same signature as the ISHE.
References
1.K. Ando, et al., Nat. Mater. 12, 622 (2013)
2.D. Sun, et al., Nat. Mater.15, 863 (2016)