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Electroconduction and thermoelectricity of terbium oxide films
Author(s) -
Smolin M. D.,
Andreeva A. F.,
Ogorodnik V. A.
Publication year - 1983
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2221150230
Subject(s) - polaron , terbium , seebeck coefficient , thermoelectric effect , oxide , electrical resistivity and conductivity , materials science , condensed matter physics , radius , analytical chemistry (journal) , activation energy , ion , chemistry , thermodynamics , physics , electron , computer security , organic chemistry , chromatography , quantum mechanics , computer science , metallurgy
The dependence of electric conductivity and thermoelectric power of terbium oxide films TbO 1.75− x upon the temperature (250 to 600 °C) and oxide composition ( x = 0 to 0.25) is investigated. The results obtained are interpreted in terms of the small polaron theory. The thermoelectric power of TbO 1.75 does not depend on temperature and is equal to −35 μV/K and the dependence of thermoelectric power of TbO 1.75− x on the parameter x is in accordance with Heike's formula for the hopping. Also, some parameters of charge transfer mechanism motion are determined. The activation energy of drift mobility of small polarons in TbO 1.75 is equal to 0.40 eV and the small polaron radius is equal to 0.21 nm. The concentration of small polarons in TbO 1.75− x does not depend on temperature and is equal to the concentration of trivalent terbium ions.