Nanoconstriction-based spin-Hall nano-oscillator

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Abstract
We experimentally demonstrate magnetic nano-oscillators driven by pure spin current produced by the spin Hall effect in a bow tie-shaped nanoconstriction. These devices exhibit single-mode auto-oscillation and generate highly-coherent electronic microwave signals with a significant power and the spectral linewidth as low as 6.2 MHz at room temperature. The proposed simple and flexible device geometry is amenable to straightforward implementation of advanced spintronic structures such as chains of mutually coupled spin-Hall nano-oscillators.
Funding Information
  • Russian Ministry of Education and Science (2013-220-04-329)
  • National Science Foundation (ECCS-1305586)

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