Magnetotransport in the heavy-fermion compoundU2Zn17

The magnetic transition in ${\mathrm{U}}_2$ ${\mathrm{Zn}}_{17}$ occurring at 9.8 K appears as a local minimum in the Hall coefficient, as a kink in the electrical resistivity, and as a sign change in the magnetoresistivity. Above 20 K the results can be interpreted using an independent magnetic-impurity model. From 9.8 K to 20 K the electronic scattering is altered by coherence effects. Below 9.8 K the positive magnetoresistivity arises from competition between the effective internal field and the applied magnetic field.