The thermodynamic characteristics of point defects and the mechanism of charge transfer in lanthanum cobaltite doped with strontium and nickel / Petrov A. N.,Cherepanov V. A.,Aksenova T. V.,Gavrilova L. Ya. // RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY. - 2006. - V. 80, l. 1. - P. S134-S139.

ISSN/EISSN:

0036-0244 / нет данных

Type:

Article

Abstract:

The specific conductivity and thermal electromotive force ( EMF) coefficient of lanthanum cobaltite doped with strontium and nickel La-0.9 Sr0.1Co0.9Ni0.1O3-delta were measured over the temperature and pressure ranges 1023 - 1223 K and 10(-6)-1 atm. The oxide was found to exhibit metallic- type conductivity (800 Omega(-1) cm(-1) <= sigma <= 1150 Omega(-1) cm(-1)) and small positive thermal EMF coefficient values. A joint analysis of the thermodynamic characteristics of formation of point defects and external T and parameter dependences of conductivity and thermal EMF showed that charge was transferred in the oxide by small-radius polarons according to the hopping mechanism. The role of polarons was played by electrons and holes localized on 3 d transition metals. The isothermal dependences of the concentrations and mobilities of charge carriers on the degree of oxygen nonstoichiometry of the oxide studied were calculated.

Author keywords:

нет данных

DOI:

10.1134/S0036024406130231

Web of Science ID:

ISI:000202973400023

Соавторы в МНС:

Другие поля

Поле	Значение
Month	NOV
Publisher	MAIK NAUKA/INTERPERIODICA/SPRINGER
Address	233 SPRING ST, NEW YORK, NY 10013-1578 USA
Language	English
Research-Areas	Chemistry
Web-of-Science-Categories	Chemistry, Physical
Author-Email	alexander.petrov@usu.ru
ResearcherID-Numbers	Cherepanov, Vladimir/E-6451-2014
ORCID-Numbers	Cherepanov, Vladimir/0000-0003-3653-6459
Number-of-Cited-References	13
Usage-Count-Since-2013	2
Journal-ISO	Russ. J. Phys. Chem.
Doc-Delivery-Number	V43ZQ