Abstract
The de Haas-van Alphen (dHvA) effect has been measured for antiferromagnetic PrB6, NdB6, and GdB6. The dHvA data of PrB6 and NdB6 show paramagnetic Fermi surfaces which arise from magnetic breakdown through the small antiferromagnetic gaps in high fields very similar to those of LaB6. In contrast, the antiferromagnetic Fermi surfaces which arise from new magnetic Brillouin zone boundaries introduced by the magnetic order seem to be very different in PrB6 and NdB6, respectively. In GdB6 dHvA oscillations could be observed for the first time. In all three compounds magnetic phase transitions have been observed in the dHvA measurements in the field range of 10–12 T.
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