TY - JOUR
T1 - Transport properties of manganese perovskites Bi1-xCa xMnO3 (0.7 ≤ x ≤ 0.95)
AU - Mizushima, T.
AU - Shimizu, K.
AU - Kuwai, T.
AU - Atou, T.
AU - Isikawa, Y.
PY - 2009
Y1 - 2009
N2 - We report the temperature dependence of electrical resistivity and thermoelectric power of the manganese perovskites Bi1-xCa xMnO3 (0.7 x 0.95). The resistivity for x 0.75 and 0.7 is well fitted with ρ exp(l/T)(1/4) below the charge-ordering temperatures (Tco). The temperature dependence of thermoelectric power for samples with x 0.8, 0.75 and 0.7 shows the rapid decrease below T co. In the lower temperatures than Tco, it goes through minimum and absolute thermoelectric power decreases and tends to change the sign. The activation energy was estimated as 57, 64, 148 meV for x 0.8, 0.75, 0.7 from the linear fits in the form S - 1/T plots. The activation energy increases with decreasing the Ca content in the Bi1-xCa xMnO3 system.
AB - We report the temperature dependence of electrical resistivity and thermoelectric power of the manganese perovskites Bi1-xCa xMnO3 (0.7 x 0.95). The resistivity for x 0.75 and 0.7 is well fitted with ρ exp(l/T)(1/4) below the charge-ordering temperatures (Tco). The temperature dependence of thermoelectric power for samples with x 0.8, 0.75 and 0.7 shows the rapid decrease below T co. In the lower temperatures than Tco, it goes through minimum and absolute thermoelectric power decreases and tends to change the sign. The activation energy was estimated as 57, 64, 148 meV for x 0.8, 0.75, 0.7 from the linear fits in the form S - 1/T plots. The activation energy increases with decreasing the Ca content in the Bi1-xCa xMnO3 system.
UR - http://www.scopus.com/inward/record.url?scp=77952515165&partnerID=8YFLogxK
U2 - 10.1088/1742-6596/150/4/042130
DO - 10.1088/1742-6596/150/4/042130
M3 - 学術論文
AN - SCOPUS:77952515165
SN - 1742-6588
VL - 150
JO - Journal of Physics: Conference Series
JF - Journal of Physics: Conference Series
IS - 4
M1 - 042130
ER -