Rare earth intermetallic compounds

Wallace WE, Sankar SG, Rao VUS (1977) Field Effects in Rare-Earth Intermetallic Compounds. 33 1-55... 

E. Gratz and M.J. Zuckermann, Transport properties (electrical resitivity, thermoelectric power thermal conductivity) of rare earth intermetallic compounds 117... 

FIGURE 13 Volumetric specific heat of two rare-earth intermetallic compounds and lead. 

In the case of normal rare earth intermetallic compounds, it is quite plausible to assume that the rare earth has well-defined 4fn configuration with an oxidation state of +3. Thus the behaviour of the rare earth ion in a metallic system is similar to insulators. The 4/ electrons are strongly correlated in atomic type configurations characterized by total angular momentum quantum levels, J in accordance with Hund s rules. 

Many models have been postulated to account for the interconfiguration fluctuations (ICF) in rare earth intermetallic compounds. We will consider Hirst s model which assumes that the 4/ electrons are highly correlated and preserve their atomic-like features during the valence fluctuation. Both the X-ray photoelectron spectra and the magnetic susceptibility of rare earth intermetallic compounds can be successfully explained on the basis of Hirst s model [8,11]. 

Crystal Field Effects in Rare-Earth Intermetallic Compounds... 

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