Self-assembly of iron nanoclusters on the Fe3O4(111) superstructured surface

Details Self-assembly of iron nanoclusters on the Fe3O4(111) superstructured surface Self-assembly of iron nanoclusters on the Fe3O4(111) superstructured surface

2004-05-10

arxiv.org/abs/cond-mat/0405201v2

Phys. Rev. B 71, 113406 (2005)

Physics

Condensed Matter

Materials Science

6 pages, 3 figures

Scientific paper

10.1103/PhysRevB.71.113406

We report on the self-organized growth of a regular array of Fe nanoclusters on a nanopatterned magnetite surface. Under oxidizing preparation conditions the (111) surface of magnetite exhibits a regular superstructure with three-fold symmetry and a 42 A periodicity. This superstructure represents an oxygen terminated (111) surface, which is reconstructed to form a periodically strained surface. This strain patterned surface has been used as a template for the growth of an ultrathin metal film. A Fe film of 0.5 A thickness was deposited on the substrate at room temperature. Fe nanoclusters are formed on top of the surface superstructure creating a regular array with the period of the superstructure. We also demonstrate that at least the initial stage of Fe growth occurs in two-dimensional mode. In the areas of the surface where the strain pattern is not formed, random nucleation of Fe was observed.

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