Title of article :
Ultra thin films of gadolinium deposited by evaporation in ultra high vacuum conditions: Composition, growth and morphology
Author/Authors :
O.A. Herrera-Sancho، نويسنده , , D. Castro-Gonz?lez، نويسنده , , J.A. Araya-Pochet، نويسنده , , W.E. Vargas-Castro، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2011
Pages :
9
From page :
3510
To page :
3518
Abstract :
Ultra-thin gadolinium films with thicknesses between 8 and 101 Å were deposited on AT-cut crystalline quartz substrates under ultra high vacuum conditions, and subsequently subjected to composition and morphologic characterization through X-ray photo-spectroscopy analysis and atomic force microscopy. Oxygen contamination is found on the samples, and its amount is estimated in terms of the thickness of an oxygen layer over the gadolinium films after subtracting the contribution to the XPS spectra of the underlying background. Atomic force microscope pictures provide evidence of having metal island films, with two growing regimes: the Volmer–Weber mode for the thinner films considered and the Stranski–Krastanov growing mode for the thicker ones. From evaluation of the sticking coefficient, the shape of the islands is approximated in terms of oblate spheroid caps and variation of the contact angle with film mass thickness is reported.
Keywords :
Film morphology , Metal island films , Ultra thin films , Growing modes
Journal title :
Applied Surface Science
Serial Year :
2011
Journal title :
Applied Surface Science
Record number :
1013850
Link To Document :
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