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arXiv · 1310.7996

Spin torque ferromagnetic resonance with magnetic field modulation

A. M. Gonçalves·I. Barsukov·Y. -J. Chen·L. Yang·J. A. Katine·I. N. Krivorotov
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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.

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A. M. Gonçalves, I. Barsukov, Y. -J. Chen, L. Yang, J. A. Katine, I. N. Krivorotov. 2013-10-30. Spin torque ferromagnetic resonance with magnetic field modulation. https://doi.org/10.1063/1.4826927

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