The magnetothermoelectric power in the Y- and Ho-doped La0.9Te0.1MnO3

We present the results of a systematic study of thermoelectric power S ( T ) at zero field and applied magnetic field in the nonmagnetic Y- and magnetic Ho-doped manganites La0.9−xY (Ho)xTe0.1MnO3 ( 0.05 ≤ x ≤ 0.15 ). For x ≤ 0.10 samples, an additional positive magnetothermoelectric power (MTEP) is induced by Y and Ho doping below Curie temperature T C besides a large negative MTEP in the vicinity of T C . The Ho-doped compounds have larger resistivity ρ and larger S compared to the Y-doped compounds in the same concentration. The magnetic disorder introduced by Ho doping can play an important role in affecting the electronic and thermal transport properties of the sample.