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The electrical resistivity of a single-crystalline whisker of UPdIn at 4.2 K was measured in magnetic fields up to 35 T applied along the c -axis of the hexagonal structure. The resistivity values become drastically suppressed in magnetic fields where the metamagnetic transitions appear on the magnetization curve. Taking into account these results, Fermi surface nesting due to the noncompensated antiferromagnetic structure with the propagation vector along the c -axis is suggested to be a source of the large values of the electrical resistivity in zero magnetic field.

Electrical resistivity measurements have been performed on a series of mono- and polycrystalline U(Pt1-xPdx)3 compounds (x ⩽ 0.15) in the temperature range 1.4-300 K. On alloying with Pd the spin-fluctuation-like resistivity of pure UPt3 transforms into a more complex curve for x = 0.02 and x = 0.05 revealing a transition at 3.3 K and 5.6 K, respectively. At higher Pd concentrations (x = 0.10,0.15) the resistivity curves change to a Kondo-type of behaviour. In the same concentration range a second phase appears in the X-ray patterns.

Hall-effect of single-crystalline UPt 3 and U(Pt 0.95 Pd 0.05 ) 3 was measured in magnetic fields up to 38 T. At all investigated temperatures R H is found to decrease with increasing field; at 1.4 and 4.2 K a large peak is found that is attributed to the suppression of antiferromagnetic correlations.