An Effective-Viscosity Description of Domain-Wall Motion in Magnetic Thin Films with Perpendicular Anisotropy

Authors

Ralph Skomski, University of Nebraska-LincolnFollow
J. Giergiel, Max-Planck-Institut fur Mikrostrukturphysik, Weinberg 2, 061 20 Halle, Germany
J. Kirschner, Max-Planck-Institut fur Mikrostrukturphysik, Weinberg 2, 061 20 Halle, GermanyFollow

Date of this Version

September 1996

Comments

Published in IEEE TRANSACTIONS ON MAGNETICS, VOL 32, NO 5, SEPTEMBER 1996.

Abstract

The expansion of magnetic domains in thin films with perpendicular anisotropy is investigated. To determine the domain-wall velocity as a function of the applied magnetic field a self-=consistent magnetic-viscosity approach is used. The main predictions of the theory are a linear behavior\r in the limit of moderately strong fields, a quasi-exponential behavior for fields close to the propagation field, and a negative velocity for very small and negative fields. The predictions of the theory are compatible with domain-wall investigations on Au/Co/Au sandwiches.