Oscillatory Curie temperature of two-dimensional ferromagnets
Mesoscale and Nanoscale Physics
2009-10-31 v3 Materials Science
Abstract
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.
Keywords
Cite
@article{arxiv.cond-mat/0007446,
title = {Oscillatory Curie temperature of two-dimensional ferromagnets},
author = {Marek Pajda and Josef Kudrnovsky and Ilja Turek and Vaclav Drchal and Patrick Bruno},
journal= {arXiv preprint arXiv:cond-mat/0007446},
year = {2009}
}
Comments
RevTeX 3.1, 4 pages, 3 figures (PS files); v2: revised version; v3: reference added