A Green's-function formalism combined with the transfer-matrix method is used to calculate the surface spin wave modes in semi-infinite ferromagnetic semiconductors ͑FMS's͒ with a ͑001͒ surface and the surface magnetization in the ferromagnetic phase, TрT c . The theoretical results were applied to narrow-band as well as to wide-band FMS's. ͓S0163-1829͑98͒02811-2͔
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