AN EVEN HALL-EFFECT IN SUPERCONDUCTORS

A mechanism of origination of an even (in reference to the magnetic fi eld) component of the Hall voltage in a spatially non-uniform supercon ductor is discussed and its magnitude is estimated. The effect resulti ng from the ''growth'' of a net of magnetic flux flow channels in a sa mple under the increase of the transport current and/or of the magneti c field manifests itself most vividly near T(c). The analogy with the random walk problem permits one to deduce a distribution function of a random quantity of the even Hall effect. The results obtained are in accord with the experiments performed on spatially nonuniform high-tem perature superconductors (YBCO-ceramics and YBCO-crystals).