کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5367995 | 1388380 | 2007 | 7 صفحه PDF | دانلود رایگان |
Using molecular dynamics simulations and the analytic embedded-atom method (AEAM), the surface anharmonicity of B2-FeAl(1Â 1Â 0) has been studied in the temperature range from 0Â K to 1400Â K. The temperature dependence of the interlayer spacing, mean square vibrational amplitudes, surface phonon frequencies and line-widths, and layer structure factor have been calculated. The obtained results indicate that the anharmonic effects are small in the temperature range from 0Â K to 900Â K. The temperature dependences of the interlayer spacing indicates that the rippling effect of the B2-FeAl(1Â 1Â 0) surface is exhibited by the contraction of Fe surface atoms and the expansion of Al atoms, which persists at high temperatures. The temperature dependence of the layer structure factors shows that the B2-FeAl(1Â 1Â 0) surface does not disorder until the temperature of 1300Â K.
Journal: Applied Surface Science - Volume 254, Issue 5, 30 December 2007, Pages 1475-1481