Difference in the Nature of Eu3+ Environment in Eu3+-Doped BaTiO3 and BaSnO3

BaTiO3 and BaSnO3 samples doped with Eu3+ ions were prepared using glycine‐nitrate gel combustion method. Relative intensities and line shapes of magnetic dipole allowed 5D0 → 7F1 and electric dipole allowed 5D0 → 7F2 transitions of Eu3+ from the hosts, BaTiO3 and BaSnO3, are significantly different...

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Bibliographic Details
Published in:Journal of the American Ceramic Society 2013-12, Vol.96 (12), p.3857-3861
Main Authors: Patel, Dinesh K., Vishwanadh, Bathula, Sudarsan, Vasanthakumaran, Kulshreshtha, Shailendra K.
Format: Article
Language:English
Subjects:
Barium stannate
Barium titanates
Bonding
Diffraction
Distortion
Electric dipoles
Line shape
Luminescence
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Summary:BaTiO3 and BaSnO3 samples doped with Eu3+ ions were prepared using glycine‐nitrate gel combustion method. Relative intensities and line shapes of magnetic dipole allowed 5D0 → 7F1 and electric dipole allowed 5D0 → 7F2 transitions of Eu3+ from the hosts, BaTiO3 and BaSnO3, are significantly different. Based on detailed structural investigations, it is confirmed that synthesizedBaTiO3 sample is tetragonal with no center of symmetry around Ba2+ ions. Unlike this BaSnO3 is cubic with centrosymmetric Ba2+ site. From X‐ray diffraction and experimentally obtained Judd–Ofelt parameters (Ω2 and Ω4 values), it is confirmed that in BaTiO3 there is a decrease in the average Ba–O and Ba–Ba distances compared with that in BaSnO3. This leads to higher Eu–O bond polarizability and adds to the distortion in its environment around Eu3+ in BaTiO3:Eu compared with BaSnO3:Eu. This is responsible for the observed difference in the luminescence properties.
ISSN:0002-7820
1551-2916
DOI:10.1111/jace.12596