Europhys. Lett.
Volume 69, Number 1, January 2005
Page(s) 95 - 101
Section Condensed matter: structure, mechanical and thermal properties
Published online 08 December 2004
Europhys. Lett., 69 (1), pp. 95-101 (2005)
DOI: 10.1209/epl/i2004-10298-x

On solidified mixtures of neon and argon -Evidence for the formation of $\chem{Ne_2Ar}$- and $\chem{Ar_2Ne}$-phases

M. Layer, M. Heitz, J. Meier and S. Hunklinger

Kirchhoff-Institut für Physik, Universität Heidelberg Im Neuenheimer Feld 227, 69120 Heidelberg, Germany

received 6 September 2004; accepted 25 October 2004
published online 8 December 2004

Gaseous mixtures of neon and argon were quench-condensed on a surface held at 4.2 $\un{K}$. The desorption behaviour of these films was studied by means of high-frequency surface acoustic waves acting as a microbalance. Subsequent annealing of the solidified mixtures leads to steplike desorption processes. Over a wide range of film compositions, the release of neon atoms takes place at three discrete substrate temperatures. By analyzing the data with respect to the composition of the solid during annealing, we find clear evidence for the formation of phases containing a well-defined stoichiometry of neon and argon: $\chem{Ne_2Ar}$ and $\chem{Ar_2Ne}$.

68.03.Fg - Evaporation and condensation.
64.75.+g - Solubility, segregation, and mixing; phase separation.
68.55.-a - Thin film structure and morphology.

© EDP Sciences 2005