Hall effect in the heavy-fermion superconductorUPt3

The Hall effect of a ${\mathrm{UPt}}_3$ single crystal has been determined for temperatures from 2-300 K. The total Hall signal is decomposed into the normal and anomalous parts. The anomalous part is very large and positive with a pronounced maximum near 30 K reaching 2.8×${10}^{\mathrm{-}3}$ ${\mathrm{cm}}^3$ (A s${)}^{\mathrm{-}1}$. The normal part is smaller and negative and corresponds in a one-band model to about one electron per formula unit. The change of sign of the temperature derivative of the anomalous Hall effect is related to the transition into the heavy-fermion state.