Influence of gamma irradiation on the refractive index of Fe-doped barium titanate thin films

Influence of gamma irradiation on the refractive index of Fe-doped barium titanate thin films

Polycrystalline Fe-doped barium titanate (Fe-doped BaTiO 3) thin films were grown by thermal decomposition of the precursors deposited from a sol–gel system onto quartz substrates. The changes in the transmittance spectra induced by gamma irradiation on the Fe-doped BaTiO 3 thin films were quantifie...

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Bibliographic Details
Published in:Thin solid films Vol. 518; no. 24; pp. 7407 - 7411
Main Authors: Kongwut, O., Kornduangkeaw, A., Jangsawang, N., Hodak, Satreerat K.
Format: Journal Article Conference Proceeding
Language:English
Published: Amsterdam Elsevier B.V 01-10-2010
Elsevier
Subjects:
Annealing
Barium titanates
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Cross-disciplinary physics: materials science; rheology
Exact sciences and technology
Fe-doped BaTiO 3
Gamma irradiation
Gamma rays
Iron
Liquid phase epitaxy; deposition from liquid phases (melts, solutions, and surface layers on liquids)
Materials science
Methods of deposition of films and coatings; film growth and epitaxy
Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation
Optical properties of specific thin films
Physics
Refractive index
Refractivity
Sol–gel method
Thin films
Gamma irradiation
Fe-doped BaTiO 3
Sol–gel method
Refractive index
Annealing
Photonic band gap
Doses
Thermal decomposition
Sol-gel method
Polycrystals
Barium titanates
Transmittance
Precursor
Fe-doped BaTiO
Thin films
Time dependence
Gamma radiation
Ferroelectric materials
Optical properties
Iron additions
Sol-gel process
Quantitative chemical analysis
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Summary:Polycrystalline Fe-doped barium titanate (Fe-doped BaTiO 3) thin films were grown by thermal decomposition of the precursors deposited from a sol–gel system onto quartz substrates. The changes in the transmittance spectra induced by gamma irradiation on the Fe-doped BaTiO 3 thin films were quantified. The values for the optical energy band gap were in the range of 3.42–3.95 eV depending on the annealing time. The refractive index of the film, as measured in the 350–750 nm wavelength range was in the 2.17–1.88 range for the as prepared film, and this increased to 2.34–1.95 after gamma irradiation at 15 kGy. The extinction coefficient of the film was in the order of 10 − 2 and increased after gamma irradiation. We obtained tuneable complex refractive index of the films by exposure to various gamma rays doses.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0040-6090
1879-2731
DOI:10.1016/j.tsf.2010.05.023