Fermi surface properties and metamagnetism in the antiferroquadrupolar compound PrPb3

We have measured the de Haas-van Alphen effect of PrPb3 whose antiferroquadrupolar ordering occurs at 0.41K. Main Fermi surfaces consist of four closed ones, which are almost spherical. These Fermi surfaces are the same as those of a non-f reference compound LaPb3 in topology, although the cyclotron effective masses are 2 to 6 times larger than those of LaPb3. The cyclotron effective masses are temperature-dependent, which starts gradually with decreasing the temperature below 1K. A metamagnetic transition is also found to occur at about 70 kOe below 0.6 K through the magnetization, magnetostriction and AC susceptibility measurements. These phenomena are closely related to the antiferroquadrupolar ordering at O.4K.