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- Title
Enhanced Electron Correlation in the In-doped Misfit-Layered Cobaltite Ca<sub>3</sub> Co<sub>4</sub> O<sub>9</sub> Ceramics.
- Authors
Huang, Yanan; Zhao, Bangchuan; Ang, Ran; Lin, Shuai; Huang, Zhonghao; Yin, Lihua; Tan, Shugang; Liu, Yu; Song, Wenhai; Sun, Yuping; Zhou, X. ‐ D.
- Abstract
The structural, magnetic, electrical and thermal transport properties of the polycrystalline samples Ca3 Co4− x In x O9 ( x = 0, 0.05, 0.10, 0.15, and 0.20) have been investigated systematically. The results indicate that the In-substitution has a negative effect on the low-temperature ferrimagnetic transition and the propagation of spin-density-wave. All In-doped samples have a much larger resistivity than that of the un-doped sample. And the temperature region where the Fermi liquid transport mechanism dominates is remarkably widened via In-doping. However, for the In-doped samples, as the In-doped content increases, the value of resistivity ρ decreases monotonously and the electronic correlation in the system enhances. With the addition of In-ions in Ca3 Co4 O9 system, the thermopower S and the ZT value decrease. The results are suggested to originate from the variations of carrier concentration and lattice disharmony in this system induced by In-doping.
- Subjects
MAGNETIC properties; ELECTRIC properties; THERMAL properties; POLYCRYSTALS; DOPING agents (Chemistry); FERMI liquids; ELECTRONS; CONDUCTION electrons
- Publication
Journal of the American Ceramic Society, 2013, Vol 96, Issue 3, p791
- ISSN
0002-7820
- Publication type
Article
- DOI
10.1111/jace.12083