Synchronization of two spin-transfer-driven nano-oscillators coupled via magnetostatic fields

D. Mancilla-Almonacid, Alejandro O. Leon, R. E. Arias, S. Allende, and D. Altbir
Phys. Rev. E 99, 032210 – Published 11 March 2019

Abstract

The magnetization dynamics of nano-oscillators may be excited by both magnetic fields and spin-polarized currents. While the dynamics of single oscillators has been well characterized, the synchronization of several ones is not fully understood yet. An analytical and numerical study of the nonlinear dynamics of two magnetostatically coupled spin valves driven by spin-transfer torques is presented under the macrospin approximation. The oscillators interact via magnetostatic fields and exhibit a robust synchronized magnetization motion. We describe the magnetization dynamics of the system using the Landau-Lifshitz-Gilbert-Slonczewski equation. Using a modal decomposition technique, we describe the dynamics, synchronization, and competition of oscillatory modes as a function of the current density, and the geometrical parameters of the setup. Simulations of the Landau-Lifshitz-Gilbert-Slonczewski equation show good agreement with an approximate analytic solution.

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  • Received 7 December 2018
  • Revised 29 January 2019

DOI:https://doi.org/10.1103/PhysRevE.99.032210

©2019 American Physical Society

Physics Subject Headings (PhySH)

Nonlinear DynamicsCondensed Matter, Materials & Applied Physics

Authors & Affiliations

D. Mancilla-Almonacid1, Alejandro O. Leon2, R. E. Arias3, S. Allende1, and D. Altbir1

  • 1Departamento de Física, CEDENNA, Universidad de Santiago de Chile, USACH, Av. Ecuador 3493, Santiago, Chile
  • 2Instituto de Física, Pontificia Universidad Católica de Valparaíso, Casilla 4059, Chile
  • 3Departamento de Física, CEDENNA, Facultad de Ciencias Físicas y Matemáticas, Universidad de Chile, Av. Blanco Encalada 2008, Santiago, Chile

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Issue

Vol. 99, Iss. 3 — March 2019

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