Exponential dependence of the interlayer exchange coupling on the spacer thickness in MBE-grown Fe/SiFe/Fe sandwiches

Autor: de Jj Jitze Vries, de Wjm Wim Jonge, RM Jungblut, den Fja Broeder, JT Jürgen Kohlhepp, R Reinder Coehoorn, A. Reinders
Přispěvatelé: Applied Physics and Science Education, Physics of Nanostructures
Jazyk: angličtina
Rok vydání: 1997
Předmět:
Zdroj: Physical Review Letters, 78(15), 3023-3026. American Physical Society
ISSN: 0031-9007
DOI: 10.1103/physrevlett.78.3023
Popis: The structure and interlayer exchange coupling in MBE-grown Fe/SiFe/Fe has been investigated. From structural analysis with LEED and from magnetic analysis with the magneto-optical Kerr effect, it is concluded that the Si spacer transforms into an ordered ${\mathrm{Si}}_{0.5}{\mathrm{Fe}}_{0.5}$ alloy. A strong antiferromagnetic coupling is found (maximum $\ensuremath{-}2.0\mathrm{mJ}/{\mathrm{m}}^{2}$), the strength of which varies exponentially as a function of the spacer thickness. This behavior can be explained within the framework of recent coupling theories.
Databáze: OpenAIRE