Quantitative comparison of magnon transport experiments in three-terminal YIG/Pt nanostructures acquired via dc and ac detection techniques

Abstract

All-electrical generation and detection of pure spin currents is a promising way towards controlling the diffusive magnon transport in magnetically ordered insulators. We quantitatively compare two measurement schemes, which allow to measure the magnon spin transport in a three-terminal device based on a yttrium iron garnet thin film. We demonstrate that the dc charge current method based on the current reversal technique and the ac charge current method utilizing first and second harmonic lock-in detection can both efficiently distinguish between electrically and thermally injected magnons. In addition, both measurement schemes allow to investigate the modulation of magnon transport induced by an additional dc charge current applied to the center modulator strip. However, while at low modulator charge current both schemes yield identical results, we find clear differences above a certain threshold current. This difference originates from nonlinear effects of the modulator current on the magnon conductance.

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Cited by in corpus (6)

• All-electrical Magnon Transport Experiments in Magnetically Ordered Insulators
• Magnon transport in ${\mathbf{Y}}_3\mathbf{F}{\mathbf{e}}_5{\mathbf{O}}_{12}$/Pt nanostructures with reduced effective magnetization
• Non-reciprocity in magnon mediated charge-spin-orbital current interconversion
• Non-local magnon transconductance in extended magnetic insulating films.\\ Part I: spin diode effect
• Parametric resonance of spin waves in ferromagnetic nanowires tuned by spin Hall torque
• Low Temperature Suppression of the Spin Nernst Angle in Pt