Mössbauer spectroscopy,intracluster atomic mobility and thermodynamics of ultrafine oxide clusters |
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| Authors: | I P Suzdalev V N Buravtsev V K Imshennik Y V Maksimov V V Matveev A V Volynskaya A X Trautwein H Winkler |
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| Institution: | (1) N.N. Semenov Institute of Chemical Physics, Russian Academy of Sciences, 117977 Moscow, Russia;(2) Institute of Physics, Medical University of Lubeck, Ratzeburger Allee 160, D-23538 Lubeck, Germany |
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| Abstract: | Summary Dynamic properties of ultrafine clusters of γ-Fe2O3 (ferric oxide, FO) were studied by M?ssbauer spectroscopy and by thermodynamic analysis. The data obtained for FO clusters
allowed the conclusion that dynamic properties of clusters as well as the decrease of melting point and the appearance of
a gap between freezing and melting points depend on intracluster atomic mobility. Intracluster atomic mobility in FO clusters
was shown to increase by the action of surfactants which decrease intercluster interactions. The increase in intracluster
atomic mobility was suggested to proceed via formation of a solid-liquid state.
Paper presented at ICAME-95, Rimini, 10–16 September 1995. |
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| Keywords: | Phonons and vibrations in crystal lattices |
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