Title :
Relation between observed micromagnetic ripple and FMR width in ultrasoft magnetic films
Author :
Chechenin, N.G. ; Craus, C.B. ; Chezan, A.R. ; Vystavel, T. ; Boerma, D.O. ; de Hosson, J.Th.M. ; Niesen, L.
Author_Institution :
Mater. Sci. Center, Groningen Univ., Netherlands
fDate :
9/1/2002 12:00:00 AM
Abstract :
Using Lorentz transmission electron microscopy, the micromagnetic structure was observed and the periodicity and angular spread of the in-plane magnetization were estimated for Fe-Zr-N films sputter-deposited on different substrates. The influence of the micromagnetic ripple on the ferromagnetic resonance width is analyzed using an approach based on the Landau-Lifshitz equation. A strong dependence of the resonance width on the magnetic moment dispersion is predicted. To a large extent, this particular aspect explains the high frequency response in some of our films.
Keywords :
ferromagnetic materials; ferromagnetic resonance; iron alloys; magnetic moments; magnetic permeability; magnetic thin films; magnetisation; nanostructured materials; soft magnetic materials; spectral line broadening; sputtered coatings; transmission electron microscopy; zirconium alloys; FMR width; Fe-Zr-N; Fe-Zr-N ultrasoft magnetic films; Landau-Lifshitz equation; Lorentz transmission electron microscopy; complex permeability spectra; dc magnetron reactive sputtering; high frequency response; in-plane magnetization angular spread; in-plane magnetization periodicity; internal stray field; magnetic moment dispersion; micromagnetic ripple; micromagnetic structure; nanocrystalline soft magnetic films; sputter-deposited films; Equations; Frequency response; Magnetic analysis; Magnetic films; Magnetic force microscopy; Magnetic moments; Magnetic resonance; Magnetization; Micromagnetics; Transmission electron microscopy;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2002.802123
