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journal article·2017-08-01Open access

Temperature dependence of the non-local spin Seebeck effect in YIG/Pt nanostructures

Kathrin Ganzhorn, Tobias Wimmer, Joel Cramer, Richard Schlitz, Stephan Geprägs, Gerhard Jakob, Rudolf Gross, Hans Huebl, Mathias Kläui, Sebastian T. B. Goennenwein

AIP Advances· Volume 7· Issue 8
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Source abstract

Abstract

We study the transport of thermally excited non-equilibrium magnons through the ferrimagnetic insulator YIG using two electrically isolated Pt strips as injector and detector. The diffusing magnons induce a non-local inverse spin Hall voltage in the detector corresponding to the so-called non-local spin Seebeck effect (SSE). We measure the non-local SSE as a function of temperature and strip separation. In experiments at room temperature we observe a sign change of the non-local SSE voltage at a characteristic strip separation d0, in agreement with previous investigations. At lower temperatures however, we find a strong temperature dependence of d0. This suggests that both the angular momentum transfer across the YIG/Pt interface as well as the transport mechanism of the magnons in YIG as a function of temperature must be taken into account to describe the non-local SSE.
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Research context

Nanomaterials

OpenAlex topics: Magnetic properties of thin films · Quantum and electron transport phenomena · Magneto-Optical Properties and Applications

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Walther-Meißner-Institut, Bayerische Akademie der Wissenschaften 1 , 85748 Garching, Germany

Physik-Department, Technische Universität München 2 , 85748 Garching, Germany

Institute of Physics, Johannes Gutenberg-University Mainz 3 , 55099 Mainz, Germany

Graduate School of Excellence Materials Science in Mainz 4 , Staudinger Weg 9, 55128 Mainz, Germany

Institut für Festkörper- und Materialphysik, Technische Universität Dresden 5 , 01062 Dresden, Germany

Nanosystems Initiative Munich 6 , 80799 Munich, Germany

Center for Transport and Devices of Emergent Materials, Technische Universität Dresden 7 , 01062 Dresden, Germany

Funding

European Commission · Deutsche Forschungsgemeinschaft · Graduate School of Excellence Materials Science In Mainz

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