DOMAIN FMR IN EPITAXIAL CO(0001) FILMS WITH STRIPE DOMAINS

The domain resonance ferromagnetic resonance (DRFMR) is described for perpendicularly magnetized Co(0 0 0 1) thin films supporting a very na rrow, strong stripe-domain structure with domain widths of the order o f the film thickness. The DRFMR experiments show that besides the conv entional mode splitting of the uniform mode into an acoustic and an op tic mode, a series of new modes occur which are shifted down field. Th e thickness dependence of these low-field modes suggests an interpreta tion in terms of magneto-exchange modes with discrete wave vectors qua ntized across the film thickness as well as across the domain width. ( C) 1998 Elsevier Science B.V. All rights reserved.