We perform a detailed analysis of the magnetotransport and de Haas–van Alphen (dHvA) oscillations in crystal PdGa which is predicted to be a typical chiral fermion semimetal from the CoSi family holding a large Chern number. The unsaturated quadratic magnetoresistance and nonlinear Hall resistivity indicate that PdGa may be a multiband system with slight electron-hole compensation. Angular dependence of resistivity in PdGa shows weak anisotropy with twofold or threefold symmetry when the magnetic field rotates within the ($1\overline{1}0$) or (111) plane perpendicular to the current. Nine or three frequencies are extracted after the fast Fourier-transform analysis of the dHvA oscillations with $B\parallel \left[001\right]$ or $B\parallel \left[011\right]$, respectively, which is confirmed to be consistent with the Fermi surfaces obtained from first-principles calculations with spin-orbit coupling considered.

• Electronic structure
• Semimetals
• Single crystal materials
• Topological materials
• Band structure methods
• Crystal growth
• First-principles calculations
• Hall bar
• Resistivity measurements
• X-ray diffraction
• de Haas-van Alphen effect