Skip to Main content Skip to Navigation
Journal articles

Sign change of the thermoelectric power in LaCoO3

Abstract : The substitution of 1%-Ce4+ for La3+ in LaCoO 3 is found to change the sign of the Seebeck coefficient at room temperature. This demonstrates that not only holes but also electrons can be created in LaCoO3. The result is compatible with the Heikes formula for doping levels close to the "pure" trivalent Co3+ state. Nonetheless, the physical properties such as magnetic susceptibility, magnetization, thermal conductivity and resistivity are found to be asymmetric for hole and electron-doped LaCoO3. Such a different behaviour is ascribed to the very different spin-states of Co4+(low-spin, t 2g 5eg 0) and Co2+ (high-spin, tg 5 g 2).
Document type :
Journal articles
Complete list of metadata
Contributor : Sylvie Blanc Connect in order to contact the contributor
Submitted on : Wednesday, January 19, 2022 - 4:19:10 PM
Last modification on : Tuesday, May 10, 2022 - 11:20:02 AM
Long-term archiving on: : Wednesday, April 20, 2022 - 7:04:44 PM


Files produced by the author(s)


Distributed under a Creative Commons Attribution - NonCommercial 4.0 International License



Antoine Maignan, Delphine Flahaut, Sylvie Hebert. Sign change of the thermoelectric power in LaCoO3. The European Physical Journal B: Condensed Matter and Complex Systems, Springer-Verlag, 2004, 39 (2), pp.145-148. ⟨10.1140/epjb/e2004-00179-8⟩. ⟨hal-01499384⟩



Record views


Files downloads