Magnetism and transport properties of Heuser alloy Cu2VAl

Abstract

We have investigated magnetic and transport properties of Heusler alloy Cu2 VAl. Magnetic measurements confirm that the magnetic transition from ferro magn etism to paramagnetism arises near 210K for Cu2VAl sample, which is a weak ferromagnet. Resistance curves show that there is a small jump of 1% in resista nce caused by the localized impurity superconduction phase transition around 7K. The scattering between electron-phonon is the main scattering mechanism. Furthe rmore, extraordinary Hall effect exists for side jump at temperatures below T C and the phase transition leads to Hall resistivity changing abnorma lly at 7K.