Title :
Magnetic anisotropy and spin dynamics in amorphous thin ferromagnetic films
Author :
Spenato, D. ; Fessant, A. ; Gieraltowski, J. ; Loaec, J. ; Le Gall, H.
Author_Institution :
Univ. de Bretagne Occidentale, Brest, France
fDate :
11/1/1995 12:00:00 AM
Abstract :
An analytic calculation of the initial permeability frequency spectra using the Landau-Lifshitz theory is compared with experimental results obtained on ferromagnetic thin films with an in-plane uniaxial magnetic anisotropy. Agreement between the theoretical and the experimental results may not be very good. This may be due to magnetic anisotropy dispersion in the film. This dispersion is studied and seems to be due to magnetic ripples. Measurement of the ripple effect is done through the measurement of the transverse biased susceptibility and compared with theoretical results obtained with the Hoffmann theory of ripples
Keywords :
amorphous magnetic materials; ferromagnetic materials; magnetic anisotropy; magnetic permeability; magnetic thin films; spin dynamics; Hoffmann theory of ripples; Landau-Lifshitz theory; amorphous thin ferromagnetic films; in-plane uniaxial magnetic anisotropy; initial permeability frequency spectra; magnetic anisotropy; magnetic anisotropy dispersion; magnetic ripples; ripple effect; spin dynamics; transverse biased susceptibility; Amorphous magnetic materials; Amorphous materials; Anisotropic magnetoresistance; Frequency; Magnetic anisotropy; Magnetic field measurement; Magnetic films; Permeability measurement; Perpendicular magnetic anisotropy; Saturation magnetization;
Journal_Title :
Magnetics, IEEE Transactions on
