Open AccessSubtle local structural variations in oxygen deficient niobium germanate thin film glasses as revealed by x-ray absorption spectroscopy
Author(s) -
M. Alper Sahiner,
Arya Nabizadeh,
David Rivella,
Luis Cerqueira,
Justin Hachlica,
R. Morea,
J. Gonzalo,
J. C. Woicik
Publication year - 2016
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/712/1/012103
Subject(s) - xanes , extended x ray absorption fine structure , stoichiometry , germanate , materials science , thin film , oxygen , absorption (acoustics) , analytical chemistry (journal) , niobium , absorption spectroscopy , pulsed laser deposition , niobium oxide , spectroscopy , chemistry , optoelectronics , optics , nanotechnology , doping , physics , organic chemistry , quantum mechanics , chromatography , metallurgy , composite material
6 págs.; 4 figs.; 2 tabs. 16th International Conference on X-ray Absorption Fine Structure (XAFS16) ; Open Access funded by Creative Commons Atribution Licence 3.0The local electronic and crystal structure of niobium-lead-germanate, Nb2O5-PbO- GeO2 (NPG), glass thin films on silicon substrates were probed by XANES and EXAFS. NPG glasses are promising candidates for applications in nonlinear optical devices because they exhibit interesting optical characteristics such as high nonlinear third order optical susceptibility. In this work NPG glasses were prepared with pulsed laser deposition method with varying oxygen partial pressure to induce thin films with different oxygen stoichiometry. Previously, it was shown that oxygen stoichiometry has a very important effect to produce unusual high optical susceptibility. Detailed EXAFS and XANES analyses in a series of NPG thin films revealed the subtle variations in the local environment around Nb atoms and the Nb oxidation states caused by oxygen deficiencies. Published under licence by IOP Publishing LtdPeer Reviewe