Phase locking of vortex cores in two coupled magnetic nanopillars | Zendy

Qiyuan Zhu | Zendy; Xianyin Liu | Zendy; Qi Zheng | Zendy; Senfu Zhang | Zendy; Jianbo Wang | Zendy; Qingfang Liu | Zendy

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Phase locking of vortex cores in two coupled magnetic nanopillars

Author(s) -

Qiyuan Zhu,

Xianyin Liu,

Qi Zheng,

Senfu Zhang,

Jianbo Wang,

Qingfang Liu

Publication year - 2014

Publication title -

aip advances

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.421

H-Index - 58

ISSN - 2158-3226

DOI - 10.1063/1.4902178

Subject(s) - nanopillar , vortex , polarizer , condensed matter physics , polarization (electrochemistry) , physics , phase (matter) , magnetic field , micromagnetics , mechanics , optics , nanostructure , chemistry , magnetization , quantum mechanics , birefringence

Phase locking dynamics of the coupled vortex cores in two identical magnetic spin valves induced by spin-polarized current are studied by means of micromagnetic simulations. Our results show that the available current range of phase locking can be expanded significantly by the use of constrained polarizer, and the vortices undergo large orbit motions outside the polarization areas. The effects of polarization areas and dipolar interaction on the phase locking dynamics are studied systematically. Phase locking parameters extracted from simulations are discussed by theoreticians. The dynamics of vortices influenced by spin valve geometry and vortex chirality are discussed at last. This work provides deeper insights into the dynamics of phase locking and the results are important for the design of spin-torque nano-oscillators

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