Abstract :
In this Part, the conductivity of the oxide-cathode matrix in an S-type valve in the presence of a magnetic field is examined, and it is shown that the matrix exhibits a powerful magnetic-resistance effect. However, the effect occurs only when the electron transfer is by free flight through the hollow pores of the matrix and when the magnetic field is in a transverse direction, and the solid-particle phase of the conduction mechanism shows no measurable magneto-resistance effect.
