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Phys. Rev. Lett. 87, 157202 (2001)

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Metallic-Type Oscillatory Interlayer Exchange Coupling across an Epitaxial FeSi Spacer

R. R. Gareev, D. E. Bürgler, M. Buchmeier, D. Olligs, R. Schreiber, and P. Grünberg

Institut für Festkörperforschung, Forschungszentrum Jülich GmbH, D-52425 Jülich, Germany

(Received 2 November 2000; published 21 September 2001)

We study interlayer exchange coupling in epitaxial Fe/Fe_0.56Si_0.44/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 Fe_1–xSi_x (x0.5) is described by the conventional theory of interlayer coupling across metallic spacers. ©2001 The American Physical Society

URL: http://link.aps.org/abstract/PRL/v87/e157202
DOI: 10.1103/PhysRevLett.87.157202
PACS: 75.70.-i, 73.61.At, 75.30.Et        Additional Information

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