Electronic carrier mobilities of BaTiO3

Electronic carrier mobilities of a mixed conductor oxide are one of the most difficult parameters to characterize. A most direct way may be to measure the Hall effect in combination with electronic conductivity, but measurement of the Hall effect in situ at elevated temperatures is never trivial. Th...

Full description

Saved in:
Bibliographic Details
Published inJournal of the European Ceramic Society Vol. 24; no. 6; pp. 1259 - 1263
Main Authors YOO, H.-I, SONG, C.-R, LEE, D.-K
Format Conference Proceeding Journal Article
LanguageEnglish
Published Oxford Elsevier 2004
Subjects
Applied sciences
Building materials. Ceramics. Glasses
Ceramic industries
Chemical industry and chemicals
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Conductivity phenomena in semiconductors and insulators
Electronic transport in condensed matter
Electrotechnical and electronic ceramics
Exact sciences and technology
Physics
Technical ceramics
Electrical conductivity
Perovskite type compound
Electrical properties
Doping
Charge carrier mobility
Polycrystal
Mixed conductivity
Barium titanates
Hall effect
Aluminium addition
Experimental study
Oxide ceramics
Single crystal
Electroceramics
Online AccessGet full text

Cover

More Information
Summary:Electronic carrier mobilities of a mixed conductor oxide are one of the most difficult parameters to characterize. A most direct way may be to measure the Hall effect in combination with electronic conductivity, but measurement of the Hall effect in situ at elevated temperatures is never trivial. Thermopower is often employed in association with the conductivity, but the lack of knowledge of the effective densities-of-states and heats-of-transport of the carriers often renders the result unreliable, too. The mobilities of electronic carriers of BaTiO3 thus remain not so well known except for a few estimates of them. Recently, we have evaluated the mobilities of electrons (*mn) and holes (*mp) over the temperature range 800-1100NBDGC by measuring electrical conductivity and chemical diffusivity on undoped and 1.8 m/o Al-doped BaTiO3, respectively, in their mixed n /p regimes. It has been found that for the undoped, *mn=0.13 and *mp=0.08 cm2/V-s and for the Al-doped, *mn=0.08 and *mp=1.99103exp(-1.14eV/kT) cm2/V-s over the temperature range examined.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0955-2219
1873-619X
DOI:10.1016/S0955-2219(03)00504-1