The de Haas-van Alphen effect measurements of TmSb with high magnetic fields

De Haas-van Alphen effect and magnetization processes were measured in the singlet ground state compound TmSb at 1.5 K up to 300 kOe with a hybrid magnet. Peaks in the FFT spectrum of AC-susceptibility versus 1/B originating from the α electron, β and γ holes split into two peaks in the high magnetic field region. The exchange interactions between the conduction electrons and the 4f electrons were estimated by analyzing the magnetic field dependence of the splittings.