Magnetism in reduced dimensions

Details Magnetism in reduced dimensions Magnetism in reduced dimensions

2005-11-15

arxiv.org/abs/cond-mat/0511362v1

Physics

Condensed Matter

Other Condensed Matter

13 pages. Part of a Special Issue of the C. R. Physique devoted to spinelectronics (2005)

Scientific paper

10.1016/j.crhy.2005.10.011

We propose a short overview of a few selected issues of magnetism in reduced dimensions, which are the most relevant to set the background for more specialized contributions to the present Special Issue. Magnetic anisotropy in reduced dimensions is discussed, on a theoretical basis, then with experimental reports and views from surface to single-atom anisotropy. Then conventional magnetization states are reviewed, including macrospins, single domains, multidomains, and domain walls in stripes. Dipolar coupling is examined for lateral interactions in arrays, and for interlayer interactions in films and dots. Finally thermally-assisted magnetization reversal and superparamagnetism are presented. For each topic we sought a balance between well established knowledge and recent developments.

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