Spin waves in a semi-infinite XY ferromagnet

We examine theoretically the spin waves in a semi‐infinite XY ferromagnet placed in an external magnetic field parallel to the surface via the Green's function formalism. The spectra of bulk and surface spin waves are obtained. It is shown that the surface of a semi‐infinite XY ferromagnet supp...

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Veröffentlicht in:	Physica Status Solidi (b) 2003-06, Vol.237 (2), p.553-557
1. Verfasser:	Spirin, Denis V.
Format:	Artikel
Sprache:	eng
Schlagworte:	75.30.Ds 75.50.Ee Condensed matter: electronic structure, electrical, magnetic, and optical properties Exact sciences and technology Fe and its alloys Magnetic properties and materials Magnetically ordered materials: other intrinsic properties Physics Spin waves Studies of specific magnetic materials
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Beschreibung
Zusammenfassung:	We examine theoretically the spin waves in a semi‐infinite XY ferromagnet placed in an external magnetic field parallel to the surface via the Green's function formalism. The spectra of bulk and surface spin waves are obtained. It is shown that the surface of a semi‐infinite XY ferromagnet supports surface spin waves with root dispersion law. However, the penetration depth of these waves is almost the same as for the Heisenberg model.
ISSN:	0370-1972 1521-3951
DOI:	10.1002/pssb.200301749