|
ИСТИНА |
Войти в систему Регистрация |
ИПМех РАН |
||
Influence of Neutron Irradiation on the Characteristics of Phase Transitions in Multifunctional Materials with a Perovskite Structure (A Review)статья
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 13 января 2021 г.
- Авторы: Ivanov S.A., Stash A.I.
- Журнал: Russian Journal of Inorganic Chemistry
- Том: 65
- Номер: 12
- Год издания: 2020
- Издательство: Maik Nauka/Interperiodica Publishing
- Местоположение издательства: Russian Federation
- Первая страница: 1789
- Последняя страница: 1819
- Оригинальные версии: Влияние нейтронного облучения на характеристики фазовых переходов в многофункциональных материалах со структурой перовскита (обзор)
- DOI: 10.1134/s0036023620120049
- Аннотация: Exposure to neutron radiation is an efficient way to enter dosed amounts of defects into the crystaland real structures of advanced inorganic materials. Thus-gained experimental data are of importance forboth fundamental radiation materials science and for finding ways of usefully modifying the effect of radiationon the properties of practically important multifunctional materials with the perovskite structure. Thereview considers the specificity of the effect of exposure to neutron radiation on the parameters of crystal andreal structures and on the multifunctional (ferroelectric, superconducting, nonlinear optical, magnetic, andother) properties of crystals of the perovskite family that experience various structural phase transitions. Thereview dwells on the effect of radiation defects on variations of the local and macroscopic properties of crystals,reflected in the anomalies of these properties in phase-transition regions. Ferroelectric perovskite crystalsare shown to be particularly susceptible to defects. The main types of radiation-induced structural statesare considered, including their formation mechanisms and patterns. Correlation relations between the structuralalteration upon radiation exposure and the evolution of phase-transformation temperatures are considered.It is shown that variable irradiation parameters (dose, radiation annealing, impurity content, and concentrationof a certain type of initial defects) offer a means to control the kinetics of radiation rearrangementand, ultimately, the radiation resistance of the structure. In addition, taking these factors into account, onecan provide conditions for the generation of almost any metastable structural state, close to those formed inintact (non-irradiated) crystals at the pre-transition stage, that would be stable at room temperature. Thestudy of effects of neutron irradiation by precision X-ray structural analysis shows that the structural statesthat occur under radiation exposure are stable over a wide temperature range, including room temperature,and the stability of metastable states, as a rule, increases with the radiation fluence. These radiation-inducedstates are actually new structural states, intermediate between low-temperature and high-temperature polymorphsof perovskite crystals. The analysis of literature data implies that the radiation-induced structuralrearrangement, amorphization, and decomposition of the initial compound are in many cases competingprocesses, the activity of which depends on the neutron irradiation fluence and temperature. A decrease inexposure temperature often slows down the decomposition and suppresses the attendant deformation of thecrystal, which is essential for the implementation and identification of structural alterations in irradiated crystals.
- Добавил в систему: Сташ Адам Игаркович
Прикрепленные файлы
| № | Имя | Описание | Имя файла | Размер | Добавлен |
|---|---|---|---|---|---|
| 1. | Полный текст | Статья | Rus.J.Inorg.Chem.2020_Review.pdf | 5,9 МБ | 9 января 2021 [adam_stash] |
| 2. | экспертное заключение | ekspertnoe_zaklyuchenie_6251-269.pdf | 589,7 КБ | 9 января 2021 [adam_stash] |