Phys. Rev. Lett. 87, 157202 (2001) [4 pages]Metallic-Type Oscillatory Interlayer Exchange Coupling across an Epitaxial FeSi SpacerReceived 2 November 2000; published 21 September 2001 We study interlayer exchange coupling in epitaxial Fe/Fe0.56Si0.44/Fe trilayers. Iron-silicide spacers with high structural and compositional homogeneity for thicknesses up to 34 Å are grown by coevaporation from two electron-beam sources. The coupling strength oscillates with spacer thickness for temperatures from 20 to 300 K with two antiferromagnetic maxima at 12 and 26 Å, and it clearly increases with decreasing temperature down to 80 K. We conclude that the coupling across ordered Fe1-xSix ( x≈0.5) is described by the conventional theory of interlayer coupling across metallic spacers. © 2001 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.87.157202
DOI:
10.1103/PhysRevLett.87.157202
PACS:
75.70.-i, 73.61.At, 75.30.Et
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