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Improved and delayed radiative emission response of Eu-doped BaTiO3 nanoscale system

Published online by Cambridge University Press:  11 July 2012

M. Borah ,
D. Mohanta ,
D. Sanyal ,
M. Chakrabarti  and
D. Jana
M. Borah
Affiliation:
Nanoscience and Soft Matter Laboratory, Department of Physics, Tezpur University, Tezpur-784 028, Assam, India
D. Mohanta*
Affiliation:
Nanoscience and Soft Matter Laboratory, Department of Physics, Tezpur University, Tezpur-784 028, Assam, India
D. Sanyal
Affiliation:
Variable Energy Cyclotron Centre, 1/AF, Bidhannagar, Kolkata-700 064, India
M. Chakrabarti
Affiliation:
Department of Physics, University of Calcutta, 92 Acharya Prafulla Chandra Road, Kolkata-700 009, India
D. Jana*
Affiliation:
Department of Physics, University of Calcutta, 92 Acharya Prafulla Chandra Road, Kolkata-700 009, India
*
ae-mail: [email protected]
be-mail: [email protected]
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Abstract

We report on the structural, spectroscopic and radiative emission characteristics of Eu-doped BaTiO3 (BT) nanosystem as compared to the pure BT system. The structural analysis was performed by X-ray diffraction (XRD) studies where the nanoscale BT sample exhibits a perovskite structure with most intense peak along (1 1 0) plane that depicts the preferred crystallographic orientation. Also, the diffraction peak intensity was found to be suppressed for Eu-doped BT nanosystem. The nature of radiative emission was evaluated via steady-state photoluminescence spectroscopy (PL) and positron annihilation spectroscopy (PAS). The improved radiative emission response, with Eu2+ doping, was believed to be accompanied by 4f65d→4f7 transitions in case of Eu-doped BT system. Whereas, PAS lifetime study of doped sample has revealed longer lifetimes indicating thereby partial substitution of Ti4+ by Eu2+ in BaTiO3 system.

Type
Research Article
Information
The European Physical Journal - Applied Physics , Volume 59 , Issue 1 , July 2012 , 10402
Copyright
© EDP Sciences, 2012

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