NDLI: Electron Paramagnetic Resonance Investigations of Lanthanide-Doped Barium Titanate: Dopant Site Occupancy

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Electron Paramagnetic Resonance Investigations of Lanthanide-Doped Barium Titanate: Dopant Site Occupancy

Content Provider	Semantic Scholar
Author	Dunbar, Timothy D. Warren, William L. Tuttle, Bruce A. Randall, And Clive A. Tsur, Yoed
Copyright Year	2004
Abstract	Air-fired barium titanate samples doped with cerium, neodymium, samarium, gadolinium, dysprosium, erbium, or ytterbium were examined by electron paramagnetic resonance (EPR). Reducing atmosphere-fired europium-doped barium titanate was also investigated with EPR. Each dopant was studied in both Ba- and Ti-rich (Ba/Ti = 1.01, 0.99) samples. Point charge calculations were used to predict the EPR spectrum of each lanthanide in A- and B-sites. Different EPR spectra are expected for A- versus B-site substitution when Ce3+, Sm3+, Dy3+, and Yb3+ are the dopants. The experimentally observed Ba/Ti doping behavior of Ce3+ in BaTiO3 suggests that as a 3+ cation it is on the A-site. No EPR active signal was observed for Sm3+ in BaTiO3. Eu2+ and Gd3+, as previously discussed in the literature, were found to be an A-site dopant and amphoteric, respectively. Dy3+ was found to be a B-site dopant with an EPR signal intensity suggesting amphoteric behavior, whereas Yb3+ showed only B-site occupancy. Nd3+ and Er3+ could not...
Starting Page	908
Ending Page	917
Page Count	10
File Format	PDF HTM / HTML
DOI	10.1021/jp036542v
Alternate Webpage(s)	http://gwri-ic.technion.ac.il/pdf/Professors/Yoed_Tsur/1.pdf
Alternate Webpage(s)	https://doi.org/10.1021/jp036542v
Volume Number	108
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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