Dresden 2017 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 64: Poster 1
MA 64.25: Poster
Freitag, 24. März 2017, 09:30–13:00, P2-EG
Non-local magnetoresistance by magnon transport in various magnetic insulating garnets — •Nynke Vlietstra1, Kathrin Ganzhorn1,2, Tobias Wimmer1,2, Stephan Geprägs1, Rudolf Gross1,2,3, Sebastian T.B. Goennenwein1,2,3,4, and Hans Huebl1,2,3 — 1Walther-Meißner-Institut, Bayerische Akademie der Wissenschaften, Garching, Germany — 2Physik-Department, Technische Universität München, Garching, Germany — 3Nanosystems Initiative Munich (NIM), München, Germany — 4Institut für Festkörperphysik, Technische Universität Dresden, Dresden, Germany
In recent years the ferrimagnetic insulating material yttrium iron garnet (YIG) has been intensively studied, mostly in combination with an adjacent few-nm-thick platinum (Pt) layer. Besides the local generation and detection of pure spin-currents in such a bilayer system, it was shown in 2015 that it is also possible to generate non-local electrical signals by transporting spin-information through the electrical insulating YIG layer by diffusion of incoherent magnons (quantized spin-waves) [1,2]. We study this non-local magnon transport, by electrical injection as well as by thermal excitation of magnons, for various magnetic insulating garnets. By measuring as a function of temperature and both the direction and magnitude of an applied magnetic field, we investigate the influence of various magnetic structures on the magnon generation, transport and non-local detection.
L. Cornelissen et al., Nat. Phys. 11, 1022 (2015)
S. T. B. Goennenwein et al., Appl. Phys. Lett. 107, 172405 (2015)