Volume 58, Number 5, June 2002
|Page(s)||737 - 743|
|Section||Condensed matter: structure, mechanical and thermal properties|
|Published online||01 May 2002|
X-ray study of the structure and order in lithographic Cu3Au nano-cuboids
Max-Planck Institut für Metallforschung -
D-70569 Stuttgart, Germany and Universität Stuttgart, Institut für
Theoretische und Angewandte Physik D-70569 Stuttgart, Germany
2 Institut für Festkörper- und Werkstofforschung - D-01069 Dresden, Germany
3 Laboratoire de Physique des Solides, Université Paris Sud 91405 Orsay, France
Accepted: 6 March 2002
We present a structural and thermodynamic study of lithographically produced Cu3Au nano-structures on a sample which contained both an array of periodically arranged nano-cuboids with a size of nm3 and a closed thin film. It is shown that the coherence features of the X-ray beam and the periodical arrangement of the nano-structures give rise to an unusual interference pattern which is exploited as a control tool for the sample quality during the experiment. With this in hand, the L12-A2 phase transformation in the nano-structures is investigated together with the behaviour of the thin film which can be compared in situ. The temperature-dependent study at this order-disorder phase transformation yields a remarkable difference in the transition temperature Tc, where Tc of the nano-cuboids is about 200 K lower than in the closed film.
PACS: 68.35.Rh – Phase transitions and critical phenomena / 68.65.-k – Low-dimensional, mesoscopic, and nanoscale systems: structure and nonelectronic properties / 61.10.Eq – X-ray scattering (including small-angle scattering)
© EDP Sciences, 2002
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