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Electrical transport properties of YCo1 − xMnxO3 (0 ≤ x ≤ 0.2) prepared by sol–gel process

Mn substitution compounds YCo1−xMnxO3 (0 ≤ x ≤ 0.2) are synthesized by using the sol–gel process. Electrical transport properties of YCo1−xMnxO3 are investigated in the temperature range from 200 K to 780 K. The experimental results show that after Mn substitution the electrical resistivity of YCo1−xMnxO3 first increases, then decreases, which is due to the electrons introduced by Mn doping. The sign of Seebeck coefficient for YCo1−xMnxO3 (x ≠ 0) is positive or negative, which is also proved by the Hall coefficient measurement. Moreover, at about room temperature, the Seebeck coefficient of YCo1−xMnxO3 with 1% doping Mn content becomes a negative value, whose absolute value is maximum; furthermore, the absolute value gradually decreases with increasing the Mn substitution content, which can be explained by the double carrier model.