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arXiv · 1909.12445

Thermally driven two-magnet nano-oscillator with large spin-charge conversion

Bassim Arkook·Christopher Safranski·Rodolfo Rodriguez·Ilya N. Krivorotov·Tobias Schneider·Kilian Lenz·Jürgen Lindner·Houchen Chang·Mingzhong Wu·Yaroslav Tserkovnyak·Igor Barsukov
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Abstract

Next-generation spintronic applications require material properties that can be hardly met by one material candidate. Here we demonstrate that by combining insulating and metallic magnets, enhanced spin-charge conversion and energy-efficient thermal spin currents can be realized. We develop a nanowire device consisting of an yttrium iron garnet and permalloy bi-layer. An interfacial temperature gradient drives the nanowire magnetization into auto-oscillations at gigahertz frequencies. Interfacial spin coupling and magnetoresistance of the permalloy layer translate spin dynamics into sizable microwave signals. The results show prospect for energy-efficient spintronic devices and present an experimental realization of magnon condensation in a heterogeneous magnetic system.

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Bassim Arkook, Christopher Safranski, Rodolfo Rodriguez, Ilya N. Krivorotov, Tobias Schneider, Kilian Lenz, Jürgen Lindner, Houchen Chang, Mingzhong Wu, Yaroslav Tserkovnyak, Igor Barsukov. 2019-09-27. Thermally driven two-magnet nano-oscillator with large spin-charge conversion. https://arxiv.org/abs/1909.12445

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