Lanthanide-doped strontium barium niobate (SBN) materials: A vibrational investigation

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• 作者：D. Kasprowicz ; T. Runka ; A. Speghini ; D. Falcomer ; J. Garcí ; a Solé ; M. Bettinelli
• 关键词：Strontium barium niobate ; Single crystals ; Nanocrystals ; Vibrational properties
• 刊名：Journal of Luminescence
• 出版年：2008
• 期刊代码：54_00222313
• 类别：ch
• 出版时间：May-June 2008
• 卷：128
• 期：5-6
• 页码：985-987
• 文件大小：136 K

摘要

Vibrational Raman spectra have been measured for strontium barium niobate (Sr_0.5Ba_0.5Nb₂O₆, SBN50) single crystals and nanopowders doped with 1 mol%of the luminescent ions Eu³⁺ and Er³⁺. The nanocrystalline materials show slightly broader spectra with respect to the single crystals with the same composition. The presence of the Eu³⁺ and Er³⁺ ions at the 1 mol%doping level, and the present particle size (200 nm) do not appear to affect the ferro-to-paraelectric phase transition temperature typical of undoped SBN50 single crystals, as detected from anomalies in the dependence of the position of the Raman peak around 635 cm⁻¹ as a function of the temperature.