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American Chemical Society, Analytical Chemistry, 4(81), p. 1522-1528, 2009

DOI: 10.1021/ac802145t

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Probe for Spin- and Valence-Selective X-ray Absorption Fine Structure Spectroscopy: EuLγ4Emission

Journal article published in 2009 by Hisashi Hayashi ORCID, Naomi Kawamura, Masaichiro Mizumaki, Toshiro Takabatake
This paper was not found in any repository; the policy of its publisher is unknown or unclear.
This paper was not found in any repository; the policy of its publisher is unknown or unclear.

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Abstract

EuLgamma(4) emission spectra of EuS, EuF(3), EuCl(3), and Eu(2)O(3) were measured using a multicrystal, multidetector spectrometer. Splitting of the EuLgamma(4) band was observed in the EuS spectra and attributed to exchange interactions between Eu5p and Eu4f. It was shown that because of this splitting, the EuLgamma(4) emission could be used for performing spin-selective measurements. This emission exhibited a large chemical shift (approximately 5 eV), depending on the valence state of a compound. The applicability of this emission to valence-selective X-ray absorption fine structure spectroscopy was demonstrated through partial fluorescence yield measurements performed on a 1:1 mixture of EuS and Eu(2)O(3) and on a valence-fluctuating compound Eu(3)Pd(20)Ge(6).