Dresden 2017 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 48: Spin Dynamics and Transport: Spin Excitations and Spin Torque Phenomena
MA 48.5: Vortrag
Donnerstag, 23. März 2017, 10:30–10:45, HSZ 101
Non-local magnon transport in iron garnet/Pt nanostructures — •Kathrin Ganzhorn1,2, Tobias Wimmer1,2, Zhiyong Qiu3, Stephan Gepraegs1, Nynke Vlietstra1, Rudolf Gross1,2,4, Hans Huebl1,2,4, Eiji Saitoh3, and Sebastian T.B. Goennenwein1,2,4,5 — 1Walther-Meissner-Institut, Garching, Germany — 2Physik-Department, Technische Universität München, Garching, Germany — 3Institute for Materials Research, Tohoku University, Sendai, Japan — 4Nanosystems Initiative Munich, Munich, Germany — 5Institut für Festkörperphysik, Technische Universität Dresden, Dresden, Germany
Magnons, the carriers of angular momentum in magnetically ordered systems, are attractive for information transfer and processing. For the realization of corresponding devices, an all-electrical generation and detection of magnons is desirable. Recent experiments in yttrium iron garnet/platinum (YIG/Pt) bilayers show that non-equilibrium magnons can be injected electrically into the insulating YIG by driving a dc charge current through the Pt, via spin scattering mechanisms at the YIG/Pt interface. The magnons propagate through the YIG and are detected as a non-local resistive voltage in a second, electrically isolated Pt strip [1,2]. We study this effect, called magnon-mediated magnetoresistance (MMR), in different iron garnet/Pt systems as a function of the distance between injector and detector, temperature and magnetic field. This work is supported by the DFG via SPP 1538. [1]L. Cornelissen et al., Nat. Phys. 11, 1022 (2015) [2]S. T. B. Goennenwein et al., Appl. Phys. Lett. 107, 172405 (2015)