Journal
NEW JOURNAL OF PHYSICS
Volume 17, Issue -, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/1367-2630/17/2/023061
Keywords
spin-polarized current; skyrmion; spin transfer nano-oscillators; DMI
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Funding
- National Basic Research Program of China [2012CB933101]
- NSFC [51371092, 51171075]
- Fundamental Research Funds for the Central Universities [2022013zrct01]
- Program for Changjiang Scholars and Innovative Research Team in University [IRT1251]
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Spin transfer nano-oscillators (STNOs) are nanoscale devices which are promising candidates for on-chip microwave signal sources. For application purposes, they are expected to be nano-sized, to have broad working frequency, narrow spectral linewidth, high output power and low power consumption. In this paper, we demonstrate by micromagnetic simulation that magnetic skyrmions, topologically stable nanoscale magnetization configurations, can be excited into oscillation by a spin-polarized current. Thus, we propose a new kind of STNO using magnetic skyrmions. It is found that the working frequency of this oscillator can range from nearly 0 Hz to gigahertz. The linewidth can be smaller than 1 MHz. Furthermore, this device can work at a current density magnitude as small as 10(8) A m(-2), and it is also expected to improve the output power. Our studies may contribute to the development of skyrmion-based microwave generators.
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