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Original Articles

Solubility of Ho Ions in Ho and Mg Co-doped BaTiO3 Analyzed by Rietveld Method and EXAFS

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Pages 265-270 | Received 01 Aug 2003, Accepted 01 Jan 2004, Published online: 08 Sep 2010
 

Abstract

Rietveld refinement and extended X-ray absorption fine structure (EXAFS) analysis on the synchrotron radiation X-ray data of BaTiO3-based shell phase powder specimens with Ho and Mg co-dopants were carried out to obtain the knowledge on the occupation site and its quantitative occupancy fraction in BaTiO3 perovskite structure. Ho ions occupied preferentially A-site in BaTiO3 and the occupation ratio was same in any doped compositions. Ho─O atomic distance in A-site is increased with increasing Ho doping in contract to that in B-site.

Acknowledgements

This work was supported in part by a grant from the NITECH 21st Century COE Program “World Ceramics Center for Environmental Harmony” by Japanese Ministry of Education, Science and Culture.

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