title: Origin of biquadratic coupling in Fe/Cr(100) superlattices.
abstract: We investigate the magnetic properties of a (100) oriented [Fe(1.7 nm)/Cr(8.4 nm)](10) superlattice by means of perturbed angular correlation spectroscopy. The magnetic ordering in the Cr layers is obtained by measuring the magnetic hyperfine interaction at implanted 111Cd nuclear probes. We identify dynamic antiferromagnetic spin fluctuations in the Cr layers and show that it gives rise to the biquadratic interlayer coupling.
authors.affiliation: Argonne National Laboratory, 9700 S. Cass Avenue, Argonne, Illinois 60439, USA.
authors.forename: J
authors.initials: J
authors.lastname: Meersschaut
authors.forename: C
authors.initials: C
authors.lastname: L'abbé
authors.forename: M
authors.initials: M
authors.lastname: Rots
authors.forename: S D
authors.initials: SD
authors.lastname: Bader