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Effects of Rare Earth Dopants on Crystal Structures of Bismuth Molybdate Catalysts
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A Novel Electron Paramagnetic Resonance Phenomenon in a Barium Stronium Titanate Ceramic
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Annealing on the Electrical and Dielectric Properties of Barium Strontium Titanate
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A Novel Electron Paramagnetic Resonance Phenomenon in a Barium Stronium Titanate Ceramic

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Abstract:

The electron paramagnetic resonance (EPR) technique was employed to investigate the point defects in barium strontium titanate ceramics. All samples showed a strong EPR signal with g = 2.000, which was indexed as intrinsic Ti-vacancy defects. In (Ba0.85Sr0.15)TiO3 ceramic, which showed a tetragonal symmetry and consisted of the crystallites with average size of ~ 220 nm, a novel EPR powder spectrum was observed - the g-factor of the g = 2.000 signal evolved into a g-tensor, and the two weak signals with g3 = ~ 2.6 and g1 = ~ 1.6 gradually shifted toward the g2 = 2.000 signal and approached to each other with increasing temperature.

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Periodical:

Advanced Materials Research (Volumes 295-297)

Pages:

1050-1054

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.295-297.1050

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Online since:

July 2011

Authors:

Da Yong Lu, Xiu Yun Sun

Keywords:

Barium Stronium Titanate, Dielectric Property, EPR, g-Tensor, Point Defect

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© 2011 Trans Tech Publications Ltd. All Rights Reserved

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