Scaling properties for the first RE-like mixed valence examples in uranium compounds: U 2Ru 2Sn and U 2RuGa 8

Abstract

The present study was motivated by the scaling characterization of the first example of mixed valence (MV) RE-like behaviour found recently among intermetallic ternary uranium compounds. The χ( T) function for both title compounds has been fitted to the interconfigurational fluctuation (ICF) model of Sales and Wohlleben in order to determine the characteristic fluctuation temperatures T sf and interconfigurational excitation energies E ex. A good scaling, with similar values of T sf like from those derived from the ICF model, has been achieved for both these ternaries by plotting Tχ( T)/ C against the reduced T/ T sf . Moreover, this scaling follows almost exactly those found earlier in a number of MV- RE compounds.