ELECTRICAL-RESISTIVITY MEASUREMENTS ON THE CU2MNAL HEUSLER ALLOY

Electrical resistivity measurements have been performed on the Cu2MnAl Heusler alloy in the temperature range from 4.2 to 500°K. An AT5 functionality was found for 4.2°K ≤ = T ≤ 15°K, evidencing a Bloch-Grüneisen electron-phonon scattering mechanism. For 270°K ≤ T ≤ 500°K the resistivity may be described by the AT + BT2 polynomial. The linear term is interpreted as due to the electron-phonon scattering process while the quadratic term may be ascribed to an electronic scattering due to a Spin disorder type relaxation process. The experimental results fail to provide evidences of s-d scattering of the conduction electrons. © 1979.