Nucleation of ordered fe islands on Al2O3/Ni3Al( 111)

Scanning tunneling microscopy (STM) has been used to investigate the nucleation and stability of iron clusters on the Al2O3/Ni3Al(1 1 1) surface as a function of coverage and annealing temperature. We show that atomic beam deposition of iron leads to hexagonally ordered cluster arrangements with a d...

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Veröffentlicht in:	Surface science 2006-05, Vol.600 (9), p.1804-1808
Hauptverfasser:	LEHNERT, A, KRUPSKI, A, DEGEN, S, FRANKE, K, DECKER, R, RUSPONI, S, KRALJ, M, BECKER, C, BRUNE, H, WANDELT, K
Format:	Artikel
Sprache:	eng
Schlagworte:	Condensed matter: electronic structure, electrical, magnetic, and optical properties Condensed matter: structure, mechanical and thermal properties Cross-disciplinary physics: materials science rheology Exact sciences and technology Physics
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Zusammenfassung:	Scanning tunneling microscopy (STM) has been used to investigate the nucleation and stability of iron clusters on the Al2O3/Ni3Al(1 1 1) surface as a function of coverage and annealing temperature. We show that atomic beam deposition of iron leads to hexagonally ordered cluster arrangements with a distance of 24 A between the clusters evidencing the template effect of the alumina film. The shape of the iron clusters is two-dimensional (2D) at deposition temperatures from 130 K to 160 K and three-dimensional (3D) at 300 K. However, the 2D iron clusters grown between 130 K and 160 K are stable up to 350 K.
ISSN:	0039-6028 1879-2758
DOI:	10.1016/j.susc.2006.02.013