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Spin torque ferromagnetic resonance with magnetic field modulation

  • Author(s): Gonçalves, AM
  • Barsukov, I
  • Chen, YJ
  • Yang, L
  • Katine, JA
  • Krivorotov, IN
  • et al.

Published Web Location

https://doi.org/10.1063/1.4826927
Abstract

We demonstrate a technique of broadband spin torque ferromagnetic resonance (ST-FMR) with magnetic field modulation for measurements of spin wave properties in magnetic nanostructures. This technique gives great improvement in sensitivity over the conventional ST-FMR measurements, and application of this technique to nanoscale magnetic tunnel junctions (MTJs) reveals a rich spectrum of standing spin wave eigenmodes. Comparison of the ST-FMR measurements with micromagnetic simulations of the spin wave spectrum allows us to explain the character of low-frequency magnetic excitations in nanoscale MTJs. © 2013 AIP Publishing LLC.

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