Berlin 2015 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
DS: Fachverband Dünne Schichten
DS 32: Spins in organics
DS 32.7: Vortrag
Mittwoch, 18. März 2015, 18:00–18:15, H 0111
Spin pumping through C60 thin films — •Tim Richter1, Martin Wahler1, Matthias Grünewald1, Robert Göckeritz1, and Georg Schmidt1,2 — 1Institut für Physik, Martin-Luther-Universität Halle-Wittenberg, 06099 Halle (Saale), Germany — 2Interdisziplinäres Zentrum für Materialwissenschaften, Martin-Luther-Universität Halle-Wittenberg, 06099 Halle (Saale) , Germany
Spin pumping and inverse spin-Hall effect (ISHE) are well established as methods for the creation and detection of pure spin currents [1]. Recently it has been shown that these methods can also be used to investigate pure spin currents in organic materials [2]. Here we use yttrium iron garnet (YIG) deposited by pulsed laser deposition as a source for spin pumping and sputtered platinum (Pt) for the detection via ISHE in order to investigate the propagation of spin currents in an organic material, namely C60. C60 is a small molecule which can be deposited by UHV evaporation. In our sample thin films of C60 are sandwiched between YIG and Pt. The sample is then excited by ferromagnetic resonance (FMR) inducing a spin current from the YIG through the C60 into the Pt where it is detected as a DC ISH-voltage. For layers of C60 which have a thickness of less than 10 nm we observe the ISHE. These results indicate that we observe merely a tunnelling through the C60 rather than spin diffusion which is also in agreement with typical transport in undoped C60.
[1] Saitoh et al., Appl. Phys. Lett. 88, 182509, (2006)
[2] Watanabe et al., Nat. Phys. 10, 308, (2014)