This article examines the mechanisms for controlling the currentvoltage characteristics of heterodiodes under the influence of a magnetic field. It is shown that the decrease or increase in the current carrier density depends on the Lorentz force. The height of the potential barrier changes under the influence of the resulting Hall EMF. It is explained that the recombination rate increases or decreases due to the deviation in the direction of the current carrier motion. This is shown to lead to a redistribution of the current carrier concentration.