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IR and XPS Studies on the Surface Structure of Poled ZnO–TeO 2 Glasses with Second‐Order Nonlinearity
Author(s) -
Narazaki Aiko,
Tanaka Katsuhisa,
Hirao Kazuyuki,
Hashimoto Tadanori,
Nasu Hiroyuki,
Kamiya Kanichi
Publication year - 2001
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.2001.tb00633.x
Subject(s) - x ray photoelectron spectroscopy , poling , anode , materials science , borosilicate glass , ion , analytical chemistry (journal) , chemistry , composite material , dielectric , chemical engineering , optoelectronics , electrode , ferroelectricity , organic chemistry , chromatography , engineering
The effect of thermal/electrical poling on the surface structure of 30ZnO·70TeO 2 glass has been investigated by means of IR reflectance and X‐ray photoelectron spectroscopy (XPS). All the poled glasses exhibit a common characteristic that the second‐order nonlinearity is induced preferentially in an anode‐side surface region. The reflectance from the anode‐side glass surface at around 635 cm − 1 assignable to the vibrational mode of the Te–O ax bond, where ax stands for the axial position of the TeO 4 trigonal bipyramid, is smaller in comparison with both as‐annealed and cathode‐side surfaces. The XPS analysis of the anode‐side surface shows a depletion of Zn 2+ ions and penetration of Na + ions from the borosilicate glass which was placed between the sample and the anode during poling. These results suggest that the poling brings about both the breaking of the tellurite glass network and compositional changes at the anode‐side surface below which the second‐order nonlinearity is preferentially induced.