Current-induced magnon trapping in spin torque oscillation

Takahiko Makiuchi; Naoki Kanazawa; Eiji Saitoh

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arXiv · 2403.11618

Current-induced magnon trapping in spin torque oscillation

Takahiko Makiuchi·Naoki Kanazawa·Eiji Saitoh

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Abstract

Spin torque nano-oscillators realized by magnetization dynamics trapped in a current-induced potential are reported. We fabricated Ni$_{81}$Fe$_{19}$/Pt nanostructures and measured current-induced microwave emission from the structures. The result shows an increase in the magnitude and spectral narrowing of the microwave emission. We demonstrate that the current-induced magnetic field suppresses magnon radiation loss and significantly reduces the linewidth and the threshold current required for the spin torque oscillation.

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Takahiko Makiuchi, Naoki Kanazawa, Eiji Saitoh. 2024-03-18. Current-induced magnon trapping in spin torque oscillation. https://arxiv.org/abs/2403.11618

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