Breathing domain wall mode of an interface pinned Neel wall

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS

卷:226

Article; Proceedings Paper

Dantas, AL ; Vasconcelos, MS ; Carriço, AS

关键词: domain wall excitations;    domain wall pinning;    interface effects;   

DOI  :  10.1016/S0304-8853(00)01035-0

来源: Elsevier

【 摘 要 】

A step defect at the interface between a two - sublattice antiferromagnetic substrate and a uniaxial ferromagnetic thin film stabilizes a Neel wall. Breathing domain wall modes (BDWM) are studied with the external field in the plane of the film. The restoring force of the domain wall excitations originates from the interface exchange energy within the domain wall. For low anisotropy ferromagnets there is a significant reduction of the domain wall width and the frequency of the domain wall excitations is determined from the interface exchange coupling in a small inter-face area. For strong interface coupling, the width of the domain wall excitation spectrum scales with the square root of the ratio between the interface effective exchange field and the anisotropy field of the ferromagnetic film. (C) 2001 Elsevier Science B.V. All rights reserved.

【 授权许可】

Free