Exchange interactions in itinerant electron ferromagnetic systems

Authors
Barbosa, ACD Costa, MVT Muniz, RB Castro, JDE
Citation
Acd. Barbosa et al., Exchange interactions in itinerant electron ferromagnetic systems, PHYSICA B, 261, 1999, pp. 909-910
Citations number
3
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
PHYSICA B
ISSN journal
09214526 → ACNP
Volume
261
Year of publication
1999
Pages
909 - 910
Database
ISI
SICI code
0921-4526(199901)261:<909:EIIIEF>2.0.ZU;2-#
Abstract
The exchange coupling between local moments in itinerant electron systems i s investigated. A local stiffness constant D-1 associated with transverse l ocal spin fluctuations is introduced and used to study the stability of the ferromagnetic state. Results of model calculations show that the ferromagn etic state is stable only in those ranges of parameters in which both D-1 a nd the spin-wave stiffness D-sw are positive. (C) 1999 Elsevier Science B.V . All rights reserved.