TY - JOUR
T1 - Magnetic, electric and thermoelectric properties of the quasi-1D cobalt oxides Ba1-xLaxCoO3 (x = 0, 0.2)
AU - Yamaura, K.
AU - Cava, R. J.
N1 - Funding Information:
The author, K.Y., was supported by the Japan Science and Technology Corporation. This research was supported in part by the Department of Energy, grant DE-FG02-98-ER45706.
PY - 2000/6/28
Y1 - 2000/6/28
N2 - The quasi-1D structure-type ferromagnetic (FM) cobalt oxide BaCoO3 was doped with La to a composition Ba0.8La0.2CoO3 (hexagonal, a = 5.585(1) angstroms and c = 4.721(1) angstroms), introducing 0.2 electrons per formula unit. Magnetic, electric and thermoelectric properties are compared to those of BaCoO3. The electrical resistivity decreases approximately one order of magnitude at room temperature (5×10-1 Ω cm), but remains semiconducting. The nearest-neighbor magnetic interaction in chain is FM (J/kB to approximately +94 K), and no manifest magnetic long-range order was observed above 5 K. Variable-range hopping behavior in the thermopower was found. Anderson localization is most likely to explain the poor electrical conductivity, as was suggested for the parent material BaCoO3.
AB - The quasi-1D structure-type ferromagnetic (FM) cobalt oxide BaCoO3 was doped with La to a composition Ba0.8La0.2CoO3 (hexagonal, a = 5.585(1) angstroms and c = 4.721(1) angstroms), introducing 0.2 electrons per formula unit. Magnetic, electric and thermoelectric properties are compared to those of BaCoO3. The electrical resistivity decreases approximately one order of magnitude at room temperature (5×10-1 Ω cm), but remains semiconducting. The nearest-neighbor magnetic interaction in chain is FM (J/kB to approximately +94 K), and no manifest magnetic long-range order was observed above 5 K. Variable-range hopping behavior in the thermopower was found. Anderson localization is most likely to explain the poor electrical conductivity, as was suggested for the parent material BaCoO3.
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U2 - 10.1016/S0038-1098(00)00188-5
DO - 10.1016/S0038-1098(00)00188-5
M3 - Article
AN - SCOPUS:0033685770
SN - 0038-1098
VL - 115
SP - 301
EP - 305
JO - Solid State Communications
JF - Solid State Communications
IS - 6
ER -