Peculiarities of the valence state of Ce and Yb in RM4Al8 (R = rare earth; M = Cr, Mn, Fe, Cu)
LIII X-ray absorption (77 and 300 K) and magnetic susceptibility measurements have been performed on RM4Al8 compounds. The mixed valence state of Ce was observed in CeM4Al8 with M = Cr, Mn, Fe. In the case of M = Cu the Ce3+ state is stabilized, but the Yb-based compound shows intermediate valence (...
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Published in | Journal of magnetism and magnetic materials Vol. 157-158; pp. 688 - 689 |
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Main Authors | , , , , , , , |
Format | Journal Article |
Language | English |
Published |
Elsevier B.V
02.05.1996
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Subjects | |
Online Access | Get full text |
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Summary: | LIII X-ray absorption (77 and 300 K) and magnetic susceptibility measurements have been performed on RM4Al8 compounds. The mixed valence state of Ce was observed in CeM4Al8 with M = Cr, Mn, Fe. In the case of M = Cu the Ce3+ state is stabilized, but the Yb-based compound shows intermediate valence (VYb ≈ 2.5). In other Yb-based compounds, the Yb ion is mainly in the trivalent state. The temperature dependence of the magnetic susceptibility of RFe4Al8 compounds fits the Curie-Weiss law over a wide temperature range. |
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ISSN: | 0304-8853 |
DOI: | 10.1016/0304-8853(95)00988-4 |