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Spin torque ferromagnetic resonance with magnetic field modulation

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arxiv 1310.7996 v1 pith:OQUZLWFO submitted 2013-10-30 cond-mat.mes-hall cond-mat.mtrl-sci

Spin torque ferromagnetic resonance with magnetic field modulation

A. M. Gon\c{c}alves , I. Barsukov , Y.-J. Chen , L.Yang , J. A. Katine , I. N. Krivorotov This is my paper
classification cond-mat.mes-hall cond-mat.mtrl-sci
keywords magneticspinmeasurementsst-fmrtechniquewaveferromagneticfield
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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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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