Resistivity and thermoelectric power measurements on CeFe$_2$ and its pseudobinaries

摘要

Resistivity and thermoelectric power (TEP) measurements on CeFe$_2$ and twoof its pseudo-binaries Ce(Fe, 5% Ir)$_2$ and Ce(Fe, 7% Ru)$_2$ between 78K and275K are reported. The resistivity data are analysed in terms of contributionsfrom scattering due to phonon, magnon, spin fluctuation and lattice defects,and also from interband scattering. Attempts are made to analyze the TEP datain terms of these resistivity components. Thermal hysteresis is observed in thetemperature dependence of TEP in the Ir and Ru doped CeFe$_2$ samples aroundthe ferromagnetic to antiferromagnetic transition, indicating the first ordernature of this transition.