Spectroscopic ellipsometry of interfacial phase transitions in fluid metallic systems: KxKCl1-x and Ga1-xBix [online]
The investigation of the interfacial phase transitions in fluid systems with short-range intermetallic interactions are of great interest. The phenomena were studied in two systems exhibiting a liquid-liquid miscibility gap: at the fluid/wall interface in fluid KxKCl1-x and at the fluid/vacuum inter...
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Dogel, Stanislav auth Spectroscopic ellipsometry of interfacial phase transitions in fluid metallic systems: KxKCl1-x and Ga1-xBix [online] Spectroscopic ellipsometry of interfacial phase transitions in fluid metallic systems KIT Scientific Publishing 2004 text txt rdacontent computer c rdamedia online resource cr rdacarrier The investigation of the interfacial phase transitions in fluid systems with short-range intermetallic interactions are of great interest. The phenomena were studied in two systems exhibiting a liquid-liquid miscibility gap: at the fluid/wall interface in fluid KxKCl1-x and at the fluid/vacuum interface of the Ga1 xBix alloys. To characterize the interfacial changes of the ultra thin films (composition, thickness and their evolution with time) the spectroscopic ellipsometry was performed over a wide spectral range. Whereas in the experiments on KxKCl1-x an existing ellipsometer could be used, a completely new UHV-apparatus including the in-situ phase modulation ellipsometer had to be developed for Ga1 xBix alloys. For the KxKCl1-x system new results on complete wetting at solid-liquid coexistence as well as in the homogenous liquid phase (prewetting) are presented. The spectra show the typical F center absorption which indicates that the film is a salt-rich phase. The thickness strongly increases approaching the monotectic from 30 to 440 nm, which is in agreement with the tetra point wetting scenario. For this interpretation a quantitative description of the excess Gibbs energy has been developed. For the Ga1 xBix system the results on complete wetting, surface freezing and oscillatory interfacial instabilities are presented. The high-precision spectra have been recorded approaching the liquid-liquid miscibility. These spectra have been modeled using a Ga-Bi effective medium approximation for the substrate covered by a film of liquid Bi. The measurements give evidence of tetra point wetting in the Ga-Bi system. First ellipsometric study of the surface freezing in Ga-Bi has been performed. Within the miscibility gap a very interesting effect of surface and bulk oscillatory instability was observed. The details of this process at present are not well understood, but a qualitative description is given. English molten salt surface phase transition spectroscopic ellipsometry Ga-Bi alloys 3-937300-08-2 |
language |
English |
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author |
Dogel, Stanislav |
spellingShingle |
Dogel, Stanislav Spectroscopic ellipsometry of interfacial phase transitions in fluid metallic systems: KxKCl1-x and Ga1-xBix [online] |
author_facet |
Dogel, Stanislav |
author_variant |
s d sd |
author_sort |
Dogel, Stanislav |
title |
Spectroscopic ellipsometry of interfacial phase transitions in fluid metallic systems: KxKCl1-x and Ga1-xBix [online] |
title_full |
Spectroscopic ellipsometry of interfacial phase transitions in fluid metallic systems: KxKCl1-x and Ga1-xBix [online] |
title_fullStr |
Spectroscopic ellipsometry of interfacial phase transitions in fluid metallic systems: KxKCl1-x and Ga1-xBix [online] |
title_full_unstemmed |
Spectroscopic ellipsometry of interfacial phase transitions in fluid metallic systems: KxKCl1-x and Ga1-xBix [online] |
title_auth |
Spectroscopic ellipsometry of interfacial phase transitions in fluid metallic systems: KxKCl1-x and Ga1-xBix [online] |
title_alt |
Spectroscopic ellipsometry of interfacial phase transitions in fluid metallic systems |
title_new |
Spectroscopic ellipsometry of interfacial phase transitions in fluid metallic systems: KxKCl1-x and Ga1-xBix [online] |
title_sort |
spectroscopic ellipsometry of interfacial phase transitions in fluid metallic systems: kxkcl1-x and ga1-xbix [online] |
publisher |
KIT Scientific Publishing |
publishDate |
2004 |
isbn |
3-937300-08-2 |
illustrated |
Not Illustrated |
work_keys_str_mv |
AT dogelstanislav spectroscopicellipsometryofinterfacialphasetransitionsinfluidmetallicsystemskxkcl1xandga1xbixonline AT dogelstanislav spectroscopicellipsometryofinterfacialphasetransitionsinfluidmetallicsystems |
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(CKB)4920000000101778 (oapen)https://directory.doabooks.org/handle/20.500.12854/59831 (EXLCZ)994920000000101778 |
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Spectroscopic ellipsometry of interfacial phase transitions in fluid metallic systems: KxKCl1-x and Ga1-xBix [online] |
_version_ |
1787548474654326785 |
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