کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1621280 | 1516393 | 2009 | 7 صفحه PDF | دانلود رایگان |
We present the results of directional elastic peak electron spectroscopy (DEPES) application to investigating the order–disorder transition in the surface layer of the Cu3Au(0 0 1) crystal. We measured the DEPES polar profiles for a few sample temperatures ranging from 300 to 1000 K and for a few electron energies ranging from 1000 to 2000 eV. The obtained results were compared with those calculated in the single scattering cluster (SSC) approximation for Cu3Au(0 0 1) clusters characterized by different inelastic mean free paths of electrons, effective Debye temperatures and surface layer atomic structure (including ordering and rippling of gold atoms). Measured and calculated DEPES profiles were found to be sensitive to the order–disorder transition. Reasonable agreement between measurements and calculations was obtained for the effective Debye temperature equal to (220±6220±6) and (172±4172±4) K for T
Journal: Journal of Alloys and Compounds - Volume 484, Issues 1–2, 18 September 2009, Pages 123–129