PACS. 76.50.+g Ferromagnetic, antiferromagnetic, and ferrimagnetic resonances; spin-wave resonance - 75.50.-i Studies of specific magnetic materials - 75.30.Kz Magnetic phase boundaries (including magnetic transitions, metamagnetism, etc.)
Springer Online Journal Archives 1860-2000
Abstract: FMR investigations on epitaxial partially ordered FePd thin films with a perpendicular magnetic anisotropy (PMA) are presented. The measurements have been performed over a wide frequency range (6-18 GHz) in the multidomain state where a weak-stripe domain structure exists. Parallel FMR measurements exhibit three magnetic excitations. Their dispersion curves, frequency versus resonance field, and the frequency dependence of the related resonance linewidths are reported. It is shown that the resonance fields and linewidths increase with frequency. For the two main modes identified with domain modes, these behaviors are correctly described by the Domain Mode Ferromagnetic Resonance (DM-FMR) model. Especially, the DM-FMR field-swept linewidth expressions assuming a Landau- Lifshitz-Gilbert-type relaxation have been derived and compared satisfactorily with the experimental data. The physical origin of the third excitation is discussed in terms of domain wall and spin-wave modes.
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