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Atomic distribution and hyperfine interaction of Sn-119 and Fe-57 nuclei in Mn19.3-xSn0.7Fex alloysстатья
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: 12 октября 2013 г.
- Авторы: Rusakov V.S., Ilyushin A.S., Vinogradova A.S., Nikanorova I.A., Cherepanov V.M.
- Журнал: Russian Metallurgy (Metally)
- Номер: 1
- Год издания: 1999
- Издательство: Allerton Press Inc.
- Местоположение издательства: United States
- Первая страница: 107
- Последняя страница: 115
- Аннотация: Alloys of the quasi-binary system Mn19.3-xS0.7Fex (x = 0.5-4.0) with the beta-Mn structure are investigated by Mossbauer spectroscopy at Sn-119 and Fe-57 nuclei. Interpretation and identification of the Mossbauer spectra yields the hyperfine-interaction parameters of the Sn-119 and Fe-57 nuclei, which are practically independent of the concentration of Fe atoms. Si atoms occupy 12(d) positions, while Fe atoms have a strong preference for 8(c) positions. The theoretical long-range order parameter increases with increase in the concentration of Fe atoms, while the degree of long-range order falls. Asymmetry of the quadrupole-doublet components in the spectrum of Sn-119 nuclei at room temperature is due to the Gol'danskii-Karyagin effect. Negative correlation of the shear and the quadrupole shift of the spectral components of the Sn-119 nuclei due to differences in the atomic coordination of the Sn atoms is observed. It is concluded that tin atoms only have covalent bonds with Mn and Fe atoms in 8(c) positions. Such bonds are formed with a similar degree of covalence and basically with the participation of p(x), p(y), and s electrons of the Sn atoms.
- Добавил в систему: Русаков Вячеслав Серафимович