The Fermi Surface Effect on Magnetic Interlayer Coupling

Details The Fermi Surface Effect on Magnetic Interlayer Coupling The Fermi Surface Effect on Magnetic Interlayer Coupling

2004-02-03

arxiv.org/abs/cond-mat/0402093v1

Physics

Condensed Matter

Materials Science

Scientific paper

10.1103/PhysRevB.70.064408

The oscillating magnetic interlayer coupling of Fe over spacer layers consisting of Cu$_{x}$Pd$_{1-x}$ alloys is investigated by first principles density functional theory. The amplitude, period and phase of the coupling, as well as the disorder-induced decay, are analyzed in detail and the consistency to the Ruderman-Kittel-Kasuya-Yoshida (RKKY) theory is discussed. For the first time an effect of the Fermi surface nesting strength on the amplitude is established from first principles calculations. An unexpected variation of the phase and disorder-induced decay is obtained and the results are discussed in terms of asymptotics.

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