Theory of bistable magnetostatic surface waves

Author

Boardman, A.D. ; Nikitov, S.A. ; Wang, Q.

Author_Institution

Dept. of Pure & Appl. Phys., Salford Univ., UK

Volume

30

Issue

1

fYear

1994

fDate

1/1/1994 12:00:00 AM

Firstpage

1

Lastpage

13

Abstract

A comprehensive theory of nonlinear magnetostatic wave propagation in a corrugated ferromagnetic film is presented. The applied magnetic field is in the plane of the film, and is perpendicular to the propagation direction. A portion of the film has its upper boundary periodically corrugated, and an analysis close to the Bragg condition is carried out. Typical bistable loops of output power against input power are obtained. Multistability is predicted for input powers, in the range 50-150 mW/mm. The threshold power is rather sensitive to the modulation of the upper surface, i.e., to the amplitude of the geometric variations on the periodic surface. Small amplitudes suppress the multistability and this critical region is investigated quantitatively. It is concluded that the multistable effects should be readily observable

Keywords

ferromagnetism; magnetic surface phenomena; magnetic thin films; magnetostatic waves; Bragg condition; applied magnetic field; bistable loops; bistable magnetostatic surface waves; corrugated ferromagnetic film; critical region; geometric variations; input power; multistability; multistable effects; nonlinear magnetostatic wave propagation; output power; threshold power; Corrugated surfaces; Frequency; Magnetic films; Magnetostatic waves; Optical bistability; Optical feedback; Optical films; Optical surface waves; Optical waveguides; Surface waves;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.272509

Filename

272509