Abstract
Measurements of the magnetic susceptibility χ,x-ray photoemission spectra (XPS), electrical resistivity ρand electronic structure calculations for CeNi4Bare reported. In the paramagnetic region, CeNi4Bfollows the Curie–Weiss law with µeff = 0.52µB/fu and θ = −10.7 K.The effective magnetic moment is lower than the free Ce3+-ionvalue. The Ce(3d) XPS spectra have confirmed the mixed-valence state of Ce ions in CeNi4B. The foccupancy, nf,and the coupling Δbetween the f level and the conduction states were derived to be about 0.83 and 85 meV,respectively. Both susceptibility data and XPS spectra show that Ce ions in CeNi4Bare in the intermediate-valence state. At low temperatures (below 12 K), themagnetic contribution to the electrical resistivity reveals a logarithmic slopecharacteristic of Kondo-like systems.
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