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

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.

References in corpus (5)

• The design and verification of Mumax3
• Planar Hall torque
• Perspectives of Electrically generated spin currents in ferromagnetic materials
• Reorientable Spin Direction for Spin Current Produced by the Anomalous Hall Effect
• Efficient injection and detection of out-of-plane spins via the anomalous spin Hall effect in permalloy nanowires

Cited by in corpus (1)

• Self-stabilizing exchange-mediated spin transport