4f delocalization in Gd: inelastic x-ray scattering at ultrahigh pressure.

Phys Rev Lett

Lawrence Livermore National Laboratory, Livermore, California 94551, USA.

Published: June 2006

We present resonant inelastic x-ray scattering and x-ray emission spectroscopy results on Gd metal to 113 GPa which suggest Kondo-like aspects in the delocalization of 4f electrons. Analysis of the resonant inelastic x-ray scattering data reveals a prolonged and continuous delocalization with volume throughout the entire pressure range, so that the volume-collapse transition at 59 GPa is only part of the phenomenon. Moreover, the Lgamma1 x-ray emission spectroscopy spectra indicate no apparent change in the bare 4f moment across the collapse, suggesting that Kondo screening is responsible for the expected Pauli-like behavior in magnetic susceptibility.

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http://dx.doi.org/10.1103/PhysRevLett.96.215701DOI Listing

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