THE HALL-EFFECT IN LA0.67BA0.33MNO3

The Hall effect in polycrystalline barium-substituted lanthanum mangan ite La0.67Ba0.33MnO3 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 than the normal coefficien t. At T-0=333 K the normal Hall coefficient changes sign, which indica tes a change in the type of conductivity. The temperature dependence o f the normal Hall coefficient, electrical conductivity, and magnetores istance is explained on the basis of the concept of motion of the mobi lity edge attendant as the temperature changes. (C) 1998 American Inst itute of Physics. [S1063-7761(98)01503-0].