On Biquadratic Interlayer Coupling in Magnetic Multilayers
J. Barnaś
Magnetism Theory Division, Institute of Physics, A. Mickiewicz University, Matejki 48/49, 60-769 Poznań, Poland
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Intrinsic biquadratic interlayer coupling in magnetic layered structures is analysed theoretically within the spin-polarized free-electron approximation. The corresponding coupling parameter oscillates with the interlayer thickness with the oscillation period equal to half of that for bilinear term. An extrinsic mechanism following from a competition between the intra- and interlayer exchange coupling is also discussed.
DOI: 10.12693/APhysPolA.85.461
PACS numbers: 75.50.Rr, 75.70.Cn