OBSERVATION OF HEAVY-HOLE STATE IN CESB

The acoustic de Haas van Alphen effect of the low carrier compound CeSb has been measured by a homemade dilution refrigerator. The heavy hole orbit of beta4 in the ferromagnetic phase has been clearly observed. The cyclotron effective mass of beta4 under the magnetic field along [001] direction was 4.3m0. The angular dependence of the cross-sectional area of beta4 is well explained by the band calculation based on the p-f mixing model. Some aspects of the electron-strain interaction obtained by the oscillation intensity of the elastic constant are discussed.