Specific Features of Jahn-Teller Structure Phase Transitions in Nanocrystalline Materials
| Autor: | S. A. Petrova, N. K. Tkachev, Anatoly Yakovlevich Fishman, Ivanov, R. G. Zakharov, Vladimir Borisovich Vykhodets |
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| Rok vydání: | 2009 |
| Předmět: |
Phase transition
Radiation Materials science Condensed matter physics Jahn–Teller effect Condensed Matter Physics Symmetry (physics) Nanocrystalline material Ion Condensed Matter::Materials Science Tetragonal crystal system Crystallography Latent heat Martensite Condensed Matter::Strongly Correlated Electrons General Materials Science |
| Zdroj: | Defect and Diffusion Forum. :53-58 |
| ISSN: | 1662-9507 |
| DOI: | 10.4028/www.scientific.net/ddf.283-286.53 |
| Popis: | Specific features of the structural phase transitions of the first order were investigated in nanosized crystals with Jahn-Teller ions. As an example the phase transitions of martensite type with changes in symmetry from a cubic to a tetragonal one have been considered. The Kanamori model was used to take into account the size of nanocrystallites and the distribution of cations over non-equivalent crystallographic sublattices in such systems. It was shown the temperature and the latent heat of the transition decrease significantly for the nanoscaled grains. A possibility of multi-phase state for nanocrystalline materials was considered. |
| Databáze: | OpenAIRE |
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