The Fermi model in describing phase transitions initiated by pressure variation. Bulletin of the Russian Academy of Sciences: Physics Volume 77, Issue 7, July 2013, Pages 908-912
14 сентября 2018
215
Предметная область | — |
Выходные данные | — |
Ключевые слова | — |
Вид публикации | Статья |
Контактные данные автора публикации | Naskalova, O.V.a , Smolin, A.Yu.b, Klimova, E.N.ac, Kuznetsova, E.M.a a Southern Federal University, Rostov-on-Don, 344006, Russian Federation b National Nuclear Research University (MEPhI), Volgodonsk Institute of Engineering, Volgodonsk, 347360, |
Ссылка на публикацию в интернете | www.scopus.com |
Аннотация
Having analyzed the pressure dependence of volume V(σ), we demonstrate that the mechanism of the phase transition in HfO2 corresponds to the Fermi model. This indicates that at σ = 10 GPa, the ground state of Hf ions changes. Within the Fermi model, the stiffness moduli in the phases stable at σ < 10 GPa and σ > 10 GPa are calculated. It is shown that the results obtained are in better agreement with the well-known experiment than the results obtained in the framework of the quantum chemistry model (ab initio calculations) and the Birch-Murnaghan equation of state.
Indexed keywords
Ab initio calculations; Birch-Murnaghan equation of state; Pressure dependence; Pressure variations; Quantum chemistry modeling; Stiffness moduli
ПодробнееIndexed keywords
Ab initio calculations; Birch-Murnaghan equation of state; Pressure dependence; Pressure variations; Quantum chemistry modeling; Stiffness moduli
Для того чтобы оставить комментарий необходимо авторизоваться.