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BIBTEX RIS

Oscillatory Curie Temperature of Two-Dimensional Ferromagnets

2000; American Physical Society; Volume: 85; Issue: 25 Linguagem: Inglês

10.1103/physrevlett.85.5424

ISSN

1092-0145

Autores

M. Pajda, J. Kudrnovský, I. Turek, V. Drchal, P. Bruno,

Tópico(s)

Physics of Superconductivity and Magnetism

Resumo

The effective exchange interactions of magnetic overlayers Fe/Cu(001) and Co/Cu(001) covered by a Cu-cap layer of varying thickness were calculated in real space from first principles. The effective two-dimensional Heisenberg Hamiltonian was constructed and used to estimate magnon dispersion laws, spin-wave stiffness constants, and overlayer Curie temperatures within the mean-field and random-phase approximations. Overlayer Curie temperature oscillates as a function of the cap-layer thickness in a qualitative agreement with a recent experiment.

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