Magnetic field dependence of 600 MHz SAW velocity changes for thin Ni films

Author

Walikainen, D. ; Wiegert, R.F. ; Levy, M.

Author_Institution

Dept. of Phys., Wisconsin Univ., Milwaukee, WI, USA

fYear

1988

fDate

2-5 Oct 1988

Firstpage

307

Abstract

The authors derive an expression for the change in SAW (surface acoustic wave) velocity as a function of in-plane magnetic field for thin magnetostrictive films, which compares well with the data for thin Ni films. The proposed dynamic model is based on describing the films´ in-plane magnetization as being perturbed by the periodic magnetostrictive induced change in the anisotropy field. The dissipation is phenomenologically accounted for by the Gilbert equation. It is shown that the attenuation and velocity changes have the same qualitative field dependence

Keywords

acoustic wave velocity; magnetic thin films; magnetoacoustic effects; magnetostriction; nickel; surface acoustic waves; 600 MHz; Gilbert equation; Ni thin films; SAW velocity changes; anisotropy field; attenuation; dynamic model; magnetic field dependence; periodic magnetostrictive induced change; thin magnetostrictive films; Acoustic waves; Anisotropic magnetoresistance; Equations; Magnetic anisotropy; Magnetic fields; Magnetic films; Magnetization; Magnetostriction; Perpendicular magnetic anisotropy; Surface acoustic waves;

fLanguage

English

Publisher

ieee

Conference_Titel

Ultrasonics Symposium, 1988. Proceedings., IEEE 1988

Conference_Location

Chicago, IL

Type

conf

DOI

10.1109/ULTSYM.1988.49389

Filename

49389