Magnetic, transport and thermal properties of single crystal Co2FeGa

Abstract: The magnetic, transport and thermal properties of single crystal Co2FeGa have been investigated. The small coercivity 20Oe and saturation field 4000Oe of Co2FeGa sample at temperature 5K indicates that the single crystal is magnetically soft. The resistivity (ρ) behaves according to ρ ∼ T 1/2 power law below temperature T =40K, which is due to electron–electron interaction effects in the presence of disorder. The thermal conductivity of Co2FeGa single exhibits anomalous temperature dependence above 50K, i.e., the conductivity increases with the temperature, or dκ/dT >0. We conclude that this anomalous thermal conductivity is due to the strong atomic disorder between the Fe and Co atoms. [Copyright &y& Elsevier]