The galvanomagnetic properties of a magnetic-breakdown linked-orbit network with two-dimensional topology are calculated for the case of a stochastic distribution of defects in the network. The results show excellent agreement with experiments on magnesium and illustrate the transition between a smoothly varying magnetoresistivity (semiclassical regime) and an oscillatory magnetoresistivity (quantum regime).

• Received 2 November 1988

DOI:https://doi.org/10.1103/PhysRevB.39.5678