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Bogdanov, E. V.
Pogoreltsev, E. I.
Gorev, M. V.
Molokeev, M. S.
Flerov, I. N.
2020-01-20T07:56:36Z
2020-01-20T07:56:36Z
2019-02
Bogdanov, E. V. Effect of Deuteration on Phase Transitions in Vanadium Dioxotetrafluoride [Текст] / E. V. Bogdanov, E. I. Pogoreltsev, M. V. Gorev, M. S. Molokeev, I. N. Flerov // Physics of the Solid State. — 2019. — Т. 61 (№ 2).
10637834
https://link.springer.com/article/10.1134%2FS1063783419020082
https://elib.sfu-kras.ru/handle/2311/129263
Текст статьи не публикуется в открытом доступе в соответствии с политикой журнала.
The crystals of (ND4)3VO2F4 with a high degree of deuteration (~87%) have been grown and a significant (~1.5%) increase in the unit cell volume has been detected. The decrease in the chemical pressure leads to a change in the sequence of phase transitions due to wedging-out of one of the rhombic phases observed in (NH4)3VO2F4. The thermal physical studies have been carried out and the entropies, deformations, and pressure coefficients related to structural transformations have been determined. The T–p phase diagram has been built and the pressure and temperature boundaries of crystal phase stability have been determined. The dielectric studies demonstrate a nonferroelectric nature of the phase transitions in (ND4)3VO2F4. The experimental and model entropies are compared. Based on the decrease in the entropy as a result of deuteration, a hypothesis on significant but not limited anharmonism of vibrations of ammonia tetrahedral corresponding to the disordering is proposed.
Effect of Deuteration on Phase Transitions in Vanadium Dioxotetrafluoride
Journal Article
Journal Article Preprint
29.19.09
2020-01-20T07:56:35Z
10.1134/S1063783419020082
Институт инженерной физики и радиоэлектроники
Кафедра теплофизики
Базовая кафедра физики твердого тела и нанотехнологий
Physics of the Solid State
Q3
Q4


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