Magnetoacoustic Evidence for the Existence of theL-Centered Pocket of Fermi Surface in Palladium

Abstract
Quantum oscillations in ultrasonic attenuation have been observed in Pd. We report a new frequency which is attributed to small hole pockets at the L symmetry points. Such pockets were predicted by theory but have not been seen in de Haas-van Alphen experiments. Measurements have been made of the angular variation of the extremal area of these pockets and of their cyclotron effective masses in the (100) plane.