Polar behavior in Mn-doped SrTiO3 ceramics

Polar behavior was found in Sr1−xMnxTiO3(x=0.005–0.02) ceramic system. Radio-frequency dielectric measurements showed a diffuse maximum at 25–65 K shifting to higher temperatures with increasing measurement frequency and amount of Mn. The observation of hysteretic behavior in the P versus E curves s...

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Bibliographic Details
Published in:Applied physics letters 2005-04, Vol.86 (17)
Main Authors: Tkach, A., Vilarinho, P. M., Kholkin, A. L.
Format: Article
Language:English
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Summary:Polar behavior was found in Sr1−xMnxTiO3(x=0.005–0.02) ceramic system. Radio-frequency dielectric measurements showed a diffuse maximum at 25–65 K shifting to higher temperatures with increasing measurement frequency and amount of Mn. The observation of hysteretic behavior in the P versus E curves shows the existence of a polar state at low temperatures. The hysteresis response slowly degenerates into just nonlinearity as the temperature increases. The observed relaxor-type dielectric behavior is attributed to the formation of electric dipoles and corresponding random fields due to the off-center position of Mn2+ ion at the Sr site of highly polarizable SrTiO3 lattice.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.1920414