@article{oai:nagoya.repo.nii.ac.jp:00010169,
 author = {Takami, T. and Ikuta, H.},
 journal = {JOURNAL OF APPLIED PHYSICS},
 month = {Jan},
 note = {We studied the magnetic and thermoelectric properties of the homologous series A_n+_2CoB_nO_3n+_3 (A=Ca,Sr, B=Co,Rh,Ir; n=1–3), which possess one-dimensional chain structures consisting of one CoO_6 trigonal prism and n BO_6 octahedra. Both Ca_3CoRhO_6 and Ca_3CoIrO_6, the n=1 members, exhibited an abrupt drop in the magnetic susceptibility (χ) at around 35  K with decreasing temperature. A broad peak was observed in the χ-T curves at 13 and 5  K, respectively, for the n=2 and 3 samples of the B=Rh series. The change in the magnetic behavior of the B=Rh samples with increasing n is attributable to the increase of interchain distance, while the difference of Ca_3CoRhO_6 and Ca_3CoIrO_6, despite the valence and spin state are the same, may be due to a structural distortion of the latter compound. Thermopower (S) of all three n=1 samples was about 150 µV/K at around 1000 K, and resistivity (ρ) showed semiconductive behavior, with Ca_3CoRhO_6 having the lowest resistivity. As a result, the power factor (=S^2/ρ) of Ca_3CoRhO_6 at 1073 K was more than two times larger than that of Ca_3Co_2O_6.},
 pages = {07B701--07B701},
 title = {Magnetic and thermoelectric properties of quasi-one-dimensional oxides An+_2CoB_nO_3n+_3 (A=Ca,Sr, B=Co,Rh,Ir; n=1–3)},
 volume = {103},
 year = {2008}
}