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論文

Sm valence determination of Sm-based intermetallics using $$^{149}$$Sm M$"{o}$ssbauer and Sm L$$_{rm III}$$-edge X-ray absorption spectroscopies

筒井 智嗣; 東中 隆二*; 中村 頼人*; 藤原 孝将*; 中村 仁*; 小林 義男*; 伊藤 孝; 依田 芳卓*; 加藤 和男*; 新田 清文*; et al.

Hyperfine Interactions, 242(1), p.32_1 - 32_10, 2021/12

 被引用回数:1 パーセンタイル:84.42

$$^{149}$$Sm synchrotron-radiation-based M$"{o}$ssbauer spectroscopy was performed in Sm-based intermetallics having a cubic crystal structure, Sm$$_{3}Tr_{4}$$Ge$$_{13}$$, SmB$$_{6}$$, SmBe$$_{13}$$, and Sm$$Tr_{2}$$Al$$_{20}$$ ($$Tr$$ = transition metals). In spite of the difference of the local structure around the Sm sites, the observed M$"{o}$ssbauer spectra consist of a single line at 300 K. On the other hand, Sm L$$_{rm III}$$-edge X-ray absorption spectra consist of two components, suggesting Sm$$^{2+}$$ and Sm$$^{3+}$$ states. Difference of the number of the spectral components between the M$"{o}$ssbauer spectroscopy and X-ray absorption spectroscopy is caused by the difference of the time window in the scattering process of these measurements. Correlation between the isomer shifts in the M$"{o}$ssbauer spectroscopy and average Sm valence states estimated from the X-ray absorption spectroscopy exhibits a linear correlation.

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