Ab initio calculations of magnetic structure and lattice dynamics of Fe/Pt multilayers |
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Authors: | P T Jochym K Parlinski A M Oleś |
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Institution: | 1. Institute of Nuclear Physics, Polish Academy of Sciences, Radzikowskiego 152, 31342, Kraków, Poland 2. Max-Planck-Institut für Festk?rperforschung, Heisenbergstrasse 1, 70569, Stuttgart, Germany
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Abstract: | 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. |
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Keywords: | 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 |
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