Influence of an in-plane magnetic field on the domain-wall velocity in Ga: YIG films

Author

De Leeuw, Frans H.

Author_Institution

Phillips Research Laboratories, Eindhoven, The Netherlands

Volume

9

Issue

4

fYear

1973

fDate

12/1/1973 12:00:00 AM

Firstpage

614

Lastpage

616

Abstract

Results are reported of an investigation on the velocity of a single straight magnetic domain wall in a Ga:YIG film as a function of the drive field and of a static magnetic field applied perpendicular to the wall in the plane of the film. At all drive fields a substantial increase of the wall velocity was observed when the in-plane field was applied. At an in-plane field of about 400 Oe and at a rather low drive field (2.4 Oe above the coercive field) a maximum value in wall velocity of 270 ms^-1was observed. At higher drive fields the wall velocity decreased to a constant value of 110 ms^-1, independent of the drive field. This behavior can be explained by extending Slonczewski\´s theory of domain wall motion to the present case. From the observed wall mobility parameter we have calculated the reduced Landau-Lifshitz damping constant $\\lambda /\\gamma ^{2}$ ( $3.7 \\times 10^{-9}$ Oe²s). This value is near to the value obtained by Spencer and LeCraw from linewidth measurements in FMR on Ga:YIG spheres ( $5 \\times 10^{-10}$ Oe²s).

Keywords

Magnetic bubble domains; YIG films; Damping; Energy loss; Frequency; Garnet films; Magnetic domain walls; Magnetic field measurement; Magnetic fields; Magnetic films; Magnetic resonance; Motion analysis;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.1973.1067709

Filename

1067709