Title :
Excitations of domain walls pinned at F/AF interface steps
Author :
Dantas, Ana L. ; Carriço, Artur S.
Author_Institution :
Dept. de Fisica, Univ. do Estado do Rio Grande do Norte, Natal, Brazil
fDate :
9/1/2000 12:00:00 AM
Abstract :
We study rigid displacement excitations of a Neel wall of a thin uniaxial ferromagnetic film on a two-sublattice antiferromagnetic substrate. An interface step defect pins the domain wall and provides the restoring force that stabilizes the domain wall oscillations. The frequency of the rigid displacement domain wall modes is shown to be of the same order of magnitude as that of the uniform domain modes of the ferromagnetic film, for a wide range of interface exchange energy values
Keywords :
antiferromagnetism; exchange interactions (electron); ferromagnetism; interface magnetism; magnetic domain walls; magnetic thin films; Neel wall; domain wall oscillations; domain walls excitations pinning; ferromagnetic-antiferromagnetic interface steps; interface exchange energy values; restoring force; rigid displacement domain wall modes; rigid displacement excitations; thin uniaxial ferromagnetic film; two-sublattice antiferromagnetic substrate; uniform domain modes; Antiferromagnetic materials; Chromium; Iron; Magnetic domain walls; Magnetic domains; Magnetic films; Magnetic moments; Magnetic properties; Pins; Substrates;
Journal_Title :
Magnetics, IEEE Transactions on
