Phase locking of spin-torque nano-oscillator pairs with magnetic dipolar coupling

Hao Hsuan Chen, Ching Ming Lee, Zongzhi Zhang, Yaowen Liu, Jong Ching Wu, Lance Horng, Ching Ray Chang

研究成果: Article

16 引文 斯高帕斯(Scopus)

摘要

A spin-torque nanopillar oscillator (STNO) that combines a perpendicular-to-plane polarizer (PERP) with an in-plane magnetized free layer is a good candidate for phase locking, which opens a potential approach to enhancement of the output power of STNOs. In this paper, the magnetic dipolar coupling effect is used as the driving force to synchronize two STNOs. We develop an approximation theory for synchronizing two identical and nonidentical pairs of PERP STNOs, by which the critical current of synchronization, dipolar coupling strength, phase-locking transient time, and frequency can be analytically predicted. These predictions are further confirmed by macrospin and micromagnetic simulations. Finally, we show the phase diagrams of the phase locking as a function of applied current and separation between two STNOs.

原文English
文章編號224410
期刊Physical Review B
93
發行號22
DOIs
出版狀態Published - 2016 六月 8

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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