DHVA effect studies of the Fermi surface in Cd₃Mg

The Fermi surface of ordered Cd₃Mg has been studied by using the DHVA effect. Eighteen separate DHVA frequency branches were observed and the frequencies ranged from 2*10⁵ G to 4*10⁷ G. The abundant branches observed are associated with the superlattice structure of Cd₃Mg. The overall features of the Fermi surface of Cd₃Mg are relatively simple and resemble those of the Fermi surface of Mg rather than Cd; the third-zone electron surface centred at the K point, the third- and fourth-zone electron surfaces around the L point and the so called monster waist all exist in Cd₃Mg. However, the dimensions of these Fermi surfaces are about half those in Mg.