Conductivity investigations of pure and Ba, Ca, Sr doped BiFeO3

Author

Greicius, S. ; Banys, J. ; Szafraniak, I. ; Kholkin, A.

Author_Institution

Fac. of Phys., Vilnius Univ., Vilnius, Lithuania

fYear

2009

fDate

23-27 Aug. 2009

Firstpage

1

Lastpage

3

Abstract

Dielectric investigations of pure and diamagnetically substituted Bi_1-xAE_xFeO₃ (AE = Ca, Ba, Sr; x=0.1, 0.3) has been carried out. It has been shown that high conductivity of bismuth ferrite is due to movement of oxygen vacancies. Replacement of bismuth by barium, calcium or strontium increases the activation energy of the oxygen vacancies movement, but the activation energy does not follow any particular law over the average ionic radius of the A-site. Also, a relaxor-type dielectric dispersion has been revealed in doped bismuth ferrite, which is absent in pure BFO.

Keywords

barium; bismuth compounds; calcium; doping; ionic conductivity; multiferroics; permittivity; strontium; vacancies (crystal); Bi_1-xBa_xFeO₃; Bi_1-xCa_xFeO₃; Bi_1-xSr_xFeO₃; BiFeO₃; activation energy; bismuth ferrite; dielectric property; electrical conductivity; ionic conductivity; ionic radius; multiferroic nature; oxygen vacancies; relaxor-type dielectric dispersion; Barium; Bismuth; Calcium; Conducting materials; Conductivity; Dielectric constant; Dielectric measurements; Ferrites; Strontium; Temperature; bismuth ferrite; dielectric spectroscopy; ionic conductivity; oxygen vacancies;

fLanguage

English

Publisher

ieee

Conference_Titel

Applications of Ferroelectrics, 2009. ISAF 2009. 18th IEEE International Symposium on the

Conference_Location

Xian

ISSN

1099-4734

Print_ISBN

978-1-4244-4970-5

Electronic_ISBN

1099-4734

Type

conf

DOI

10.1109/ISAF.2009.5307535

Filename

5307535