Low-Field de Haas-van Alphen Effect in Copper

Abstract

Detailed studies of the de Haas-van Alphen (dHvA) effect in Cu single crystals have been carried out with a high-sensitivity torque magnetometer in steady fields up to 40 kG. The angular variations of all pertinent dHvA frequencies were determined to better than 0.1%. New frequencies, found near the 100> directions, are attributable to noncentral extremal orbits on the belly portion of the Fermi surface. For each dHvA term observed in this study there existed orientations at which the amplitude of the fundamental vanishes as a result of the vanishing of the spin-splitting factor.