Electrically induced strong modulation of magnons transport in ultrathin magnetic insulator films

Abstract

Magnon transport through a magnetic insulator can be controlled by current-biased heavy-metal gates that modulate the magnon conductivity via the magnon density. Here, we report nonlinear modulation effects in 10nm thick yttrium iron garnet (YIG) films. The modulation efficiency is larger than 40\%/mA. The spin transport signal at high DC current density (2.2$\times 10^{11}$A/m${}^2$) saturates for a 400nm wide Pt gate, which indicates that even at high current levels a magnetic instability cannot be reached in spite of the high magnetic quality of the films.

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Cited by in corpus (8)

• Chirality as Generalized Spin-Orbit Interaction in Spintronics
• Giant magnon spin conductivity approaching the two-dimensional transport regime in ultrathin yttrium iron garnet films
• Efficient Gating of Magnons by Proximity Superconductors
• Electric Field Switching of Magnon Spin Current in a Compensated Ferrimagnet
• Voltage-control of damping constant in magnetic-insulator/topological-insulator bilayers
• Non-local magnon transconductance in extended magnetic insulating films.\\ Part I: spin diode effect
• Anisotropic Magnon Spin Transport in Ultra-thin Spinel Ferrite Thin Films -- Evidence for Anisotropy in Exchange Stiffness
• Ellipticity effects on diffusive magnon spin and heat transport in easy-plane ferromagnets