de Haas-van Alphen effect and Fermi surface ofPt3Sn

Experiments by the de Haas-van Alphen effect, together with a band-structure calculation by Skriver, show that the Fermi surface of ${\mathrm{Pt}}_3$Sn consists of cylindrical hole tubes along $\Gamma X$ $〈100〉$ direction) compensating two closed electron sheets centered at $R$. An influence of composition has been observed on the closed sheets. The shape of these sheets, obtained by inversion of the de Haas-van Alphen data, suggests magnetic breakdown when the magnetic field is in and near the $〈110〉$ direction; five of the seven possible breakdown orbits are clearly observed.