Pr-doped SrTiO3 ceramics were fabricated by the conventional solid-state reaction method. Pr-doping greatly decreased the lattice parameters and the average grain size of SrTiO3 ceramics sample. Two thermally activated dielectric relaxations were found for the low- and high-temperature relaxations, respectively. By means of a detailed analysis, the low-temperature relaxation was ascribed to the electric hopping between Pr3+ and Pr4+ induced by the Pr-doping, and the origin of the high-temperature relaxation was changed from oxygen vacancies to the polar nanoregions with the increase of Pr content.
Published in:
Journal of Applied Physics
(Volume:112
,
Issue:
4
)
Date of Publication:
Aug 2012
- Page(s):
-
044106
-
044106-4
- ISSN :
-
0021-8979
- Digital Object Identifier :
-
10.1063/1.4747937
- Date of Current Version :
-
30 August 2012
- Issue Date :
-
Aug 2012