Electrical transport properties of perpendicular magnetized Mn-Ga epitaxial films

Abstract

We report electrical transport properties of perpendicular magnetized Mn-Ga epitaxial films with various thicknesses. The maximum extraordinary Hall resistivity and Hall angle is 11.5 μΩ cm and 5.7%, respectively, which is comparable to the highest value reported in amorphous Fe0.79Gd0.21 alloy. In the low temperature region, resistivity was proportional to T2.9 owing to the unconventional one-magnon scattering processes, indicating high spin polarization of this material.