Inadequacy of the asymptotic approximation for the interlayer coupling in Fe/Ag/Fe and Fe/Au/Fe (001) trilayers

Authors
Costa, AT Castro, JDE Ferreira, MS Muniz, RB
Citation
At. Costa et al., Inadequacy of the asymptotic approximation for the interlayer coupling in Fe/Ag/Fe and Fe/Au/Fe (001) trilayers, PHYS REV B, 60(17), 1999, pp. 11894-11897
Citations number
18
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
PHYSICAL REVIEW B-CONDENSED MATTER
ISSN journal
01631829 → ACNP
Volume
60
Issue
17
Year of publication
1999
Pages
11894 - 11897
Database
ISI
SICI code
0163-1829(19991101)60:17<11894:IOTAAF>2.0.ZU;2-6
Abstract
We discuss the basic assumptions underlying the stationary phase approximat ion to the interlayer exchange coupling between magnetic materials across n onmagnetic spacers. We show that, for temperatures and spacer thicknesses o f interest, it cannot be applied to systems such as Fe/Ag/Fe and Fe/Au/Fe ( 001) trilayers. Such inadequacy results from particular confinement effects caused by the Fe layers in the Ag and Au extremal Fermi-surface "neck" sta tes. This is of special relevance to the interpretation of experimental dat a. [S0163-1829(99)04738-4].