We present Ce 3d photoemission results (XPS with Al Kα) in the temperature range 100–660°K. The mixed valence behaviour of Ce is very clear with an increase of the valence at lower temperature. A model analysis (of the Gunnarsson and Schönhammer type) gives the weight of the ⨍0 configuration equal to 0.19 at 300°K and equal to 0.23 at 100°K. This soft temperature dependence is discussed in connection with the temperature dependence of magnetic properties and with the chemistry of Ce intermetallics.
TEMPERATURE-DEPENDENT CORE PHOTOEMISSION IN CE24CO11
CANEPA, FABIO MICHELE;COSTA, GIORGIO
1985-01-01
Abstract
We present Ce 3d photoemission results (XPS with Al Kα) in the temperature range 100–660°K. The mixed valence behaviour of Ce is very clear with an increase of the valence at lower temperature. A model analysis (of the Gunnarsson and Schönhammer type) gives the weight of the ⨍0 configuration equal to 0.19 at 300°K and equal to 0.23 at 100°K. This soft temperature dependence is discussed in connection with the temperature dependence of magnetic properties and with the chemistry of Ce intermetallics.
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