Relaxation dynamics of ferromagnetic FePt thin films in a broad frequency range

2013/11/26 by N Álvarez, Noel Plascencia Álvarez, G. Alejandro +7 · 3 citations
Physics and Astronomy · Materials Science · #Magnetic properties of thin films #Magnetic Properties and Applications #Theoretical and Computational Physics

paper · pdf · doi:10.1088/0022-3727/46/50/505001

Abstract

The dynamical behaviour of FePt thin films in the chemically disordered fcc phase has been studied using ferromagnetic resonance spectroscopy in a broad range of frequencies, from 1 to 100 GHz. A set of samples with thicknesses between 9 and 94 nm was investigated at room temperature in order to analyse the damping of the magnetization as a function of the excitation frequency. As expected, the increase in frequency is accompanied by larger resonance fields and linewidths. These two quantities also display an anisotropic response when the external applied field is rotated from the in-plane to the out-of-plane direction.

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