caa a22 4500 463223020 CHVBK 20180405153218.0 cr unu---uuuuu 170326e20070301xx s 000 0 eng 10.1007/s10853-006-0346-7 doi (NATIONALLICENCE)springer-10.1007/s10853-006-0346-7 Defect structure and charge transfer in undoped and doped lanthanum cobaltites [Elektronische Daten] [A. Petrov, A. Zuev, A. Vylkov, D. Tsvetkov] The results of electronic conductivity and Seebeck coefficient are presented for perovskite-type undoped cobaltite LaCoO3−δ, doped with strontium La0.7Sr0.3CoO3−δ, and doped with copper LaCo0.7Cu0.3O3−δ. The electronic conductivity and the Seebeck coefficient were studied as a function of pO2 in the range 10−6≤pO2/atm≤1 at temperatures between 1073 and 1323K. The charge transfer mechanism in the oxides studied is revealed within the framework of localized charge carriers approach on the basis of the defect structure modeling. LaCoO3−δ and La0.7Sr0.3CoO3−δ are shown to be the typical small polaron hopping conductors with p-type small polarons at Co sites, $$ {\text{Co}}^{{\text{$ \bullet $ }}}_{{{\text{Co}}}} $$ , as major carriers and n-type small polarons, Co Co / , as minor carriers in the temperature range investigated. The charge transfer in copper-doped cobaltite LaCo0.7Cu0.3O3−δ seems to be carried out by means both hopping of n-type small polarons, Cu Co / and Co Co / , at copper and cobalt sites, respectively, and p-type small polarons at Co sites. The mobilities and nonconfigurational entropies of charge transfer are determined for all types of charge carriers. Springer Science+Business Media, LLC, 2007 Petrov A. Chemical Department, Ural State University, Lenin Av. 51, 620083, Yekaterinburg, Russia aut Zuev A. Chemical Department, Ural State University, Lenin Av. 51, 620083, Yekaterinburg, Russia aut Vylkov A. Chemical Department, Ural State University, Lenin Av. 51, 620083, Yekaterinburg, Russia aut Tsvetkov D. Chemical Department, Ural State University, Lenin Av. 51, 620083, Yekaterinburg, Russia aut Journal of Materials Science Kluwer Academic Publishers-Plenum Publishers; http://www.springer-ny.com 42/6(2007-03-01), 1909-1914 0022-2461 42:6<1909 2007 42 10853 https://doi.org/10.1007/s10853-006-0346-7 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10853-006-0346-7 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Petrov A. Chemical Department, Ural State University, Lenin Av. 51, 620083, Yekaterinburg, Russia aut NATIONALLICENCE 700 1- Zuev A. Chemical Department, Ural State University, Lenin Av. 51, 620083, Yekaterinburg, Russia aut NATIONALLICENCE 700 1- Vylkov A. Chemical Department, Ural State University, Lenin Av. 51, 620083, Yekaterinburg, Russia aut NATIONALLICENCE 700 1- Tsvetkov D. Chemical Department, Ural State University, Lenin Av. 51, 620083, Yekaterinburg, Russia aut NATIONALLICENCE 773 0- Journal of Materials Science Kluwer Academic Publishers-Plenum Publishers; http://www.springer-ny.com 42/6(2007-03-01), 1909-1914 0022-2461 42:6<1909 2007 42 10853 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer