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M: Metallphysik

M 28: Nanoskalige Materialien II

M 28.2: Fachvortrag

Donnerstag, 29. März 2001, 12:00–12:15, S5.3

Structural and Thermodynamic Investigations of Cu₃Au-Nano-Cuboids — •T. Schülli¹, J. Trenkler¹, I. Mönch², D. Le Bolloc’h³, and H. Dosch¹ — ¹Max-Planck-Institut für Metallforschung, Heisenbergstr. 1, 70569 Stuttgart — ²Institut für Festkörper- und Werkstofforschung, Helmholtzstr. 20, 01069 Dresden — ³European Synchrotron Radiation Facility, BP 220, F-38043 Grenoble Cedex, France

The understanding of the influence of nano-structuring on the thermodynamic properties of an epitaxially grown thin film is of crucial importance for the study of nano-thermodynamics. In this talk, we introduce a structural and thermodynamic study of well-defined 200x200x13 nm³ large Cu₃Au nano-cuboids fabricated by electron beam lithographic methods. Via our partial coherence model and a sample design containing both a closed thin film and periodically arranged nano-cuboids, we are able to in-situ study their properties at the order-disorder phase transformation when using coherent x-ray diffraction. The experiments yielded a phase transformation temperature of the nano-cuboids by more than 200 K lower than in the thin film.