Пожалуйста, используйте этот идентификатор, чтобы цитировать или ссылаться на этот ресурс:
http://elar.urfu.ru/handle/10995/111930
Название: | Hydrogen Dynamics in the Hexagonal Ho2Fe17H4 and Y2Fe17H4.2: Inelastic and Quasielastic Neutron Scattering Studies |
Авторы: | Skripov, A. V. Isnard, O. Mushnikov, N. V. Terent'ev, P. B. Gaviko, V. S. Udovic, T. J. |
Дата публикации: | 2017 |
Издатель: | Elsevier Ltd Elsevier BV |
Библиографическое описание: | Hydrogen Dynamics in the Hexagonal Ho2Fe17H4 and Y2Fe17H4.2: Inelastic and Quasielastic Neutron Scattering Studies / A. V. Skripov, O. Isnard, N. V. Mushnikov et al. // Journal of Alloys and Compounds. — 2017. — Vol. 720. — P. 277-283. |
Аннотация: | The vibrational spectra of hydrogen and the parameters of H jump motion in the hexagonal Th2Ni17-type compounds Ho2Fe17H4 and Y2Fe17H4.2 have been studied by means of inelastic and quasielastic neutron scattering. It is found that hydrogen atoms occupying interstitial Ho(Y)2Fe2 sites in both compounds participate in the fast localized jump motion over the hexagons formed by these tetrahedral sites. The temperature dependence of the H jump rate is well described by the Arrhenius law over wide T ranges (100–340 K for Ho2Fe17H4 and 140–360 K for Y2Fe17H4.2) with the activation energies of 54 (4) meV and 84 (7) meV, respectively. For Ho2Fe17H4, the localized hydrogen jump motion is found to be the fastest among all R2Fe17 hydrides studied so far. At room temperature, the H jump rate in Ho2Fe17H4 derived from our quasielastic neutron scattering data reaches 6.4 × 1011 s−1. © 2017 Elsevier B.V. |
Ключевые слова: | DIFFUSION INELASTIC NEUTRON SCATTERING METAL HYDRIDES ACTIVATION ENERGY ATOMS DIFFUSION HYDRIDES HYDROGEN INELASTIC NEUTRON SCATTERING NEUTRON SCATTERING TEMPERATURE DISTRIBUTION ARRHENIUS LAW HYDROGEN ATOMS HYDROGEN DYNAMICS JUMP RATE METAL HYDRIDES QUASI ELASTIC NEUTRON SCATTERING TEMPERATURE DEPENDENCE TETRAHEDRAL SITES IRON COMPOUNDS |
URI: | http://elar.urfu.ru/handle/10995/111930 |
Условия доступа: | info:eu-repo/semantics/openAccess |
Идентификатор SCOPUS: | 85019754961 |
Идентификатор WOS: | 000426794200001 |
Идентификатор PURE: | 1814880 |
ISSN: | 0925-8388 |
DOI: | 10.1016/j.jallcom.2017.05.300 |
Сведения о поддержке: | This work was performed within the assignment of the Russian Federal Agency of Scientific Organizations (program "Spin" No. 012014633). The authors acknowledge support from the Ural Branch of the Russian Academy of Sciences under grant No. 15-9-2-9. AVS gratefully acknowledges financial support from the NIST Center for Neutron Research. This work utilized facilities supported in part by the National Science Foundation under Agreement No. DMR-0944772. |
Располагается в коллекциях: | Научные публикации ученых УрФУ, проиндексированные в SCOPUS и WoS CC |
Файлы этого ресурса:
Файл | Описание | Размер | Формат | |
---|---|---|---|---|
2-s2.0-85019754961.pdf | 742,62 kB | Adobe PDF | Просмотреть/Открыть |
Все ресурсы в архиве электронных ресурсов защищены авторским правом, все права сохранены.