Author/Authors :
Lehnert، نويسنده , , A. and Krupski، نويسنده , , A. ALLAN DEGEN، نويسنده , , S. and Franke، نويسنده , , K. and Decker، نويسنده , , R. and Rusponi، نويسنده , , S. and Kralj، نويسنده , , M. and Becker، نويسنده , , C. and Brune، نويسنده , , H. and Wandelt، نويسنده , , K.، نويسنده ,
Abstract :
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 إ 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.
Keywords :
Scanning tunneling microscopy (STM) , Iron , alumina , Aluminium , Cluster growth and nucleation , nickel
