NpPd2Ge2 has been studied by 237Np Moessbauer spectroscopy between 4.2 K and 80 K. The value of the isomer shift suggests a Np3+ electronic configuration. The low temperature spectra provide a value of 2.10 μB for the magnetic ordered moment on the Np site.
These values suggest a rather localized character of the 5f electrons in this system. The magnetic transition around 60 K is accompanied by a large increase of the quadrupolar interaction that is evidence of a redistribution of the electronic charges around the neptunium nucleus.
GACZYNSKI Piotr;
COLINEAU Eric;
WASTIN Franck;
BOULET P.;
REBIZANT J.;
CACIUFFO Roberto;
2011-11-16
Institute of Physics (IOP)
JRC62611
1742-6588 (print),
1742-6596 (online),
http://iopscience.iop.org/1742-6596/273/1,
https://publications.jrc.ec.europa.eu/repository/handle/JRC62611,
10.1088/1742-6596/273/1/012022,
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