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Effect of Pr substitution on structural and dielectric properties of SrTiO3

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4 Author(s)
Wang, Xiaofei ; School of Physics and Engineering, Henan University of Science and Technology, Luoyang 471023, People’s Republic of China ; Hu, Qiubo ; Li, Liben ; Lu, Xiaomei

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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

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