Journal of Siberian Federal University. Mathematics & Physics / Coupled Dynamics of Magnetic Vortices with Different Polarities in a Small-diameter Spin-transfer Nano-oscillator

Full text (.pdf)
Issue
Journal of Siberian Federal University. Mathematics & Physics. Prepublication
Authors
Ekomasov, Evgenii G.; Faskhutdinov, Radmir A.; Kabanov, Daniil K.; Kudashev, Victor S.
Contact information
Ekomasov, Evgenii G. : Institute of Physics and Technology Ufa University of Science and Technology (Ufa, Russian Federation); ; Faskhutdinov, Radmir A. : Institute of Physics and Technology Ufa University of Science and Technology (Ufa, Russian Federation); Kabanov, Daniil K. : Institute of Physics and Technology Ufa University of Science and Technology (Ufa, Russian Federation); ; Kudashev, Victor S. : Institute of Physics and Technology Ufa University of Science and Technology (Ufa, Russian Federation)
Keywords
generalized Landau–Lifshitz–Gilbert equation; magnetic vortices; spin-transfer nano-oscillator; coupled oscillator dynamics
Abstract

We investigate the dynamics of two dipolar-coupled magnetic vortices with different polarities in a small-diameter spin-transfer nano-oscillator under the influence of a spin-polarized electric current. Using micromagnetic modeling, we demonstrate the existence of three distinct vortex motion regimes separated by two critical current values. A near-linear dependence of the oscillation frequency and the vortex core orbit radius on the spin-polarized current magnitude is obtained. The results are compared with the case of coupled vortex dynamics of identical polarity

Pages
560–569
EDN
XQFDQI
Paper at repository of SibFU
https://elib.sfu-kras.ru/handle/2311/158638