Hall effect measurements in the heavy-fermion system CeCoIn5

Hall effect measurements have been conducted on high-quality single crystals of the heavy-fermion superconductor CeCoIn5. The anomalous Hall contribution is negligible in the investigated temperature range from 0.05 to 5K. The measured Hall resistivities ρxy show a noticeable change in slope between the low-field (initial Hall coefficient) and the high-field region. In the superconducting regime, T<2.3K, Hall measurements are restricted to high magnetic fields H>Hc2, the upper critical field of superconductivity. The high-field Hall coefficient is almost constant for temperatures down to 250mK. At T⩽250mK, an additional change in curvature of ρxy vs. H is observed.