Ferromagnetic resonance in soft Cu/FeCo
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We present the results of ferromagnetic resonance (FMR) measurements of soft Fe 65Co 35 thin films grown on a seed layer of Cu. FMR is investigated at different magnetic field orientations and over a broad range of frequencies from 3 to 94 GHz. The observation of spin wave resonances in the perpendicular orientation allows us to estimate the exchange stiffness. 2004 Elsevier B.V. All rights reserved.