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Growth modes of Fe(110) revisited: a contribution of self-assembly to magnetic materials

Abstract : We have revisited the epitaxial growth modes of Fe on W(110) and Mo(110), and propose an overview or our contribution to the field. We show that the Stranski-Krastanov growth mode, recognized for a long time in these systems, is in fact characterized by a bimodal distribution of islands for growth temperature in the range 250-700°C. We observe firstly compact islands whose shape is determined by Wulff-Kaischev's theorem, secondly thin and flat islands that display a preferred height, ie independant from nominal thickness and deposition procedure (1.4nm for Mo, and 5.5nm for W on the average). We used this effect to fabricate self-organized arrays of nanometers-thick stripes by step decoration. Self-assembled nano-ties are also obtained for nucleation of the flat islands on Mo at fairly high temperature, ie 800°C. Finally, using interfacial layers and solid solutions we separate two effects on the preferred height, first that of the interfacial energy, second that of the continuously-varying lattice parameter of the growth surface.
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Contributor : Olivier Fruchart Connect in order to contact the contributor
Submitted on : Friday, August 11, 2006 - 10:36:26 AM
Last modification on : Tuesday, October 19, 2021 - 10:50:44 PM
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Olivier Fruchart, Pierre-Olivier Jubert, Mustafa Eleoui, Fabien Cheynis, Bogdana Borca, et al.. Growth modes of Fe(110) revisited: a contribution of self-assembly to magnetic materials. Journal of Physics: Condensed Matter, IOP Publishing, 2007, 19, pp.053001. ⟨10.1088/0953-8984/19/5/053001⟩. ⟨hal-00089174⟩



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