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An Investigation of the Europium Valence in EuCu1.75P2by Eu Mössbauer and Eu LIII-Edge X-Ray Absorption Spectroscopy

✍ Scribed by Robert M. Bornick; Angelica M. Stacy; R.Dean Taylor; George H. Kwei

Publisher
Elsevier Science
Year
1999
Tongue
English
Weight
99 KB
Volume
144
Category
Article
ISSN
0022-4596

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✦ Synopsis

The europium valence for EuCu 1.75 P 2 is examined by Eu MoK ssbauer spectroscopy and Eu L III -edge X-ray absorption spectroscopy. On the basis of previous measurements of related phases with the ThCr 2 Si 2 structure-type, the europium valence in EuCu 1.75 P 2 is expected to be intermediate valent or trivalent. In contrast, divalent europium is observed. This result is explained on the basis of a band argument in which the conduction band is 5lled, and thus, there is an extra electron in the Eu 4f 7 state.

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