The role of next-nearest neighbours for the existence conditions of subsurface spin waves in magnetic films

Authors
Mamica, S Puszkarski, H Levy, JCS
Citation
S. Mamica et al., The role of next-nearest neighbours for the existence conditions of subsurface spin waves in magnetic films, PHYS ST S-B, 218(2), 2000, pp. 561-569
Citations number
11
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
PHYSICA STATUS SOLIDI B-BASIC RESEARCH
ISSN journal
03701972 → ACNP
Volume
218
Issue
2
Year of publication
2000
Pages
561 - 569
Database
ISI
SICI code
0370-1972(200004)218:2<561:TRONNF>2.0.ZU;2-F
Abstract
Spin-wave energies and respective band structures throughout the two-dimens ional Brillouin zone are investigated in magnetic (cubic) thin films for th e surface orientations sc(110), bcc(110) and fcc(110). We apply the Heisenb erg localized spin model assuming exchange nearest (NN) and next-nearest (N NN) neighbour interactions and elucidate the role of the geometrical dispos ition of the NN and NNN neighbourhoods for the emergence of surface (SSW) a nd subsurface spin waves (SSSW). The necessary condition for the emergence of SSSW is found to require the NNN bonds to be cut at the surface obliquel y thereto.