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 Locationhttps://doi.org/10.1063/1.4826927
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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