Title

A Cerium M-Edge X-ray Absorption Study of the CeM2 Compounds, Where M Is Mg, Al, Fe, Co, Ni, Ru and Rh

Abstract

The cerium valence in the CeM2 compounds, where M is magnesium, aluminum, iron, cobalt, nickel, ruthenium and rhodium, has been measured at room temperature by X-ray absorption at the cerium M-edge. The observed valencies, which agree with previous more limited measurements made at the cerium LIII-edge, extend the study to additional compounds and lead to the conclusion that the relationship between the cerium volume and its valence in the CeM2 compounds is not straightforward. The results show a clear linear increase in the cerium valence with the atomic number of the metal M and indicate that the increase in the cerium valence from 3.05 in CeMg2 to 3.24 in CeRh2 results from an increase in the hybridization between the cerium 4f orbitals and the highest occupied M orbitals.

Department(s)

Chemistry

Second Department

Physics

Keywords and Phrases

Aluminum; Cobalt; Iron; Magnesium; Magnetization; Nickel; Rhodium; Ruthenium; X Ray Spectroscopy; Cerium Valence; Magnetically Ordered Materials; Valence Fluctuations; X Ray Absorption; Cerium Compounds

International Standard Serial Number (ISSN)

381098

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 1998 Elsevier, All rights reserved.

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