Current Physical Chemistry

Karl J. Jalkanen  
Gilead Sciences,Inc.
San Dimas, CA
USA

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Influence of Nd Doping on the Properties of SrTiO3 thin Films Synthesized by PLD on Different Substrates

Author(s): M. R. S. Silva, M. C. F. Alves, V. Bouquet, S. Députier, G. P. Casali, I. T. Weber, S. M. Zanetti, E. Longo, M. Guilloux-Viry, A. G. Souza and I. M. G. Santos

Affiliation: Sciences Chimiques de Rennes, UMR CNRS 6226, Université de Rennes 1, UEB, Campus de Beaulieu, 35042 Rennes, France.

Keywords: Epitaxial growth, Field emission-scanning electron microscopy, micro-Raman spectroscopy, Nd doping, perovskite, pulsed laser deposition, SrTiO3, thin films, UV-Vis spectroscopy, x-ray diffraction.

Abstract:

SrTiO3, SrTi0.99Nd0.01O3 and Sr0.99Nd0.01TiO3 thin films were synthesized by pulsed laser deposition at 700 °C on different substrates (silica, R-sapphire, (100) LaAlO3 and (100) MgO). The influence of Nd3+ substitution into the A and B sites of SrTiO3 perovskite on film growth was studied. The films were characterized by X-ray diffraction (θ–2θ, θ- and θ-scans), micro-Raman spectroscopy, UV–Vis spectroscopy and field-emission scanning electron microscopy. All of the films exhibited a (h00) orientation and high-quality epitaxial growth on LaAlOθ. The films grown on MgO, with the exception of the SrTiNd0.01O3 film, also exhibited a (h00) orientation. The polycrystallinity of the SrTi0.99Nd0.01O3 film may be related to the increased lattice distortion when Ti4+ was replaced with Nd3+. A polycrystalline growth was observed for all of the films deposited on silica and R-sapphire, as expected. The Raman results showed that Nd doping led to an increase in the short-range disorder. The morphology strongly depended on the nature of the substrate and on Nd doping, specially in the case of SrTi0.99Nd0.01O3.

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Article Details

VOLUME: 3
ISSUE: 4
Page: [392 - 399]
Pages: 8
DOI: 10.2174/18779468113036660011