Bloch-Griineisen relation

These compounds are metallic conductors, and similar to YNiPb, the Bloch-Griineisen relation is also valid for Y2Ni2Pb. The magnetic ordering manifests in the temperature dependence of the resistivities through abrupt changes in the slopes (decrease of spin-disorder scattering). 

A detailed study of the electrical resistivity behavior of the La272ln and Ce272ln (T = Ni, Cu, Rh, Pd, Pt, Au) indides was performed by Kaczorowski et al. (1996a, 1996b). They evaluated the electrical resistivity data according to the modified Bloch-Griineisen relation and derived the Debye temperatures (table 17). 

Within the Debye approximation the spectral functions oc F are proportional to (o in the energy range co kgGo (0 denotes the Debye temperature). This leads to a temperature dependence of the matrix elements Qoo from which the well known Bloch-Griineisen relation for pp follows (see Blatt 1968). For the low- and high-temperature regions the Bloch-Griineisen law reveals ... 

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