The Hall effect in La_(0.67)Ba_(0.33)MnO_3

摘要

The Hall effect in polycrystalline barium-substituted lanthanum manganite La_(0.67)Ba_(0.33)MnO_3 has been investigated in the temperature interval 298 < T < 355 K. It is found that the anomalous Hall coefficient in this material is two orders of magnitude greater that the normal coefficient. At T_0 = 333 K the normal Hall coefficient changes sign, with indicates a change in the type of conductivity. The temperature dependence of the normal Hall coefficient, electrical conductivity, and magnetoresistance of explained on the basis of the concept of motion of th mobility edge attendant as the temperature changes.