Increasing the Correlation Time of Spin-Torque Oscillators Synchronized by Magnetostatic Interactions

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Abstract

Synchronization of spin-torque oscillators (STOs) via magnetostatic interactions is investigated. In order for arrays of STOs to be used to carry out computational tasks the STOs should remain phase-locked for as long as possible. The correlation time for two STOs is shown to depend on H{d}{({3}/{2})} , where H{d} is the strength of the magnetostatic interaction between the STOs. For a 1-D array of STOs, introducing an angle between adjacent STOs can reduce the magnetostatic energy and increase the correlation time by an order of magnitude, or more. The increase in correlation time is resilient to moderate distributions of size and position among the STOs.

Original languageEnglish
JournalIEEE Transactions on Magnetics
Volume58
Issue number2
DOIs
Publication statusPublished - 2022 Feb 1

Keywords

  • Simulation
  • spin-torque oscillator (STO)
  • synchronization

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering

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