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

TL;DR

This study investigates the electrical and thermoelectric properties of CeFe$_2$ and its pseudo-binaries with Ir and Ru doping, revealing insights into scattering mechanisms and a first-order magnetic transition.

Contribution

It provides detailed resistivity and thermoelectric power measurements on CeFe$_2$ and its pseudo-binaries, analyzing scattering contributions and identifying a first-order magnetic transition.

Findings

Resistivity data analyzed with phonon, magnon, and defect scattering contributions.

Thermoelectric power shows thermal hysteresis around magnetic transition.

First-order ferromagnetic to antiferromagnetic transition observed in doped samples.

Abstract

Resistivity and thermoelectric power (TEP) measurements on CeFe$_2$ and two of its pseudo-binaries Ce(Fe, 5% Ir)$_2$ and Ce(Fe, 7% Ru)$_2$ between 78K and 275K are reported. The resistivity data are analysed in terms of contributions from scattering due to phonon, magnon, spin fluctuation and lattice defects, and also from interband scattering. Attempts are made to analyze the TEP data in terms of these resistivity components. Thermal hysteresis is observed in the temperature dependence of TEP in the Ir and Ru doped CeFe$_2$ samples around the ferromagnetic to antiferromagnetic transition, indicating the first order nature of this transition.