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HomeKey Engineering MaterialsKey Engineering Materials Vols. 280-283Spin and Valence States of Manganese Ions in...

Spin and Valence States of Manganese Ions in Mn-Doped BaTiO₃ Ceramics by Electron Paramagnetic Resonance

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Abstract:

A number of paramagnetic defects and defect complexes in BaTiO3 have been detected by the Electron Paramagnetic Resonance (EPR) technique. The signal intensity, the g factors and the hyperfine splitting constants A of Mn2+ at the different temperatures were distributed with temperatures in a U-shape. In this paper, a new direct evidence for the presence of manganese with an electron spin of S=5/2 (Mn2+) in all four phases (R, O, T and C) and the high spin state of the electron configuration in MnTi² at the high temperature cubic phase is presented by EPR method in La-Mn codoped BaTiO3 PTCR ceramics.

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High-Performance Ceramics III

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Periodical:

Key Engineering Materials (Volumes 280-283)

Pages:

373-376

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.280-283.373

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Online since:

February 2007

Authors:

Zhi Gang Zhou, Zi Long Tang, Zhong Tai Zhang

Keywords:

BaTiO₃ PTCR Ceramics, Defect, EPR, Phase Transition

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© 2005 Trans Tech Publications Ltd. All Rights Reserved

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