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arXiv · 2011.07800

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

J. Liu·X-Y. Wei·G. E. W. Bauer·J. Ben Youssef·B. J. van Wees
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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 10$\,$nm 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 400$\,$nm 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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J. Liu, X-Y. Wei, G. E. W. Bauer, J. Ben Youssef, B. J. van Wees. 2020-11-16. Electrically induced strong modulation of magnons transport in ultrathin magnetic insulator films. https://doi.org/10.1103/physrevb.103.214425

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