https://doi.org/10.1140/epjb/e2008-00051-y
Ab initio calculations of magnetic structure and lattice dynamics of Fe/Pt multilayers
1
Institute of Nuclear Physics, Polish Academy of Sciences, Radzikowskiego 152, 31342 Kraków, Poland
2
Max-Planck-Institut für Festkörperforschung, Heisenbergstrasse 1, 70569 Stuttgart, Germany
Corresponding author: a Pawel.Jochym@ifj.edu.pl
Received:
4
September
2007
Revised:
20
December
2007
Published online:
6
February
2008
The magnetization distribution, its energetic characterization by the interlayer coupling constants and lattice dynamics of (001)-oriented Fe/Pt multilayers are investigated using density functional theory combined with the direct method to determine phonon frequencies. It is found that ferromagnetic order between consecutive Fe layers is favoured, with the enhanced magnetic moments at the interface. The bilinear and biquadratic coupling coefficients between Fe layers are shown to saturate fast with increasing thickness of nonmagnetic Pt layers which separate them. The phonon calculations demonstrate a rather strong dependence of partial iron phonon densities of states on the actual position of Fe monolayer in the multilayer structure.
PACS: 75.70.Cn – Magnetic properties of interfaces (multilayers, superlattices, heterostructures) / 63.22.+m – Phonons or vibrational states in low-dimensional structures and nanoscale materials / 75.50.Bb – Fe and its alloys
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2008
