Optical properties of potassium niobate thin films prepared by the polymeric precursor method

2005 ◽  
Vol 59 (5) ◽  
pp. 598-602 ◽  
Author(s):  
A.Z. Simões ◽  
A. Ries ◽  
C.S. Riccardi ◽  
M.A. Zaghete ◽  
J.A. Varela
Keyword(s):  
Thin Films ◽  
Optical Properties ◽  
Potassium Niobate ◽  
Polymeric Precursor Method ◽  
Polymeric Precursor ◽  
Precursor Method

scholarly journals Epitaxially grown LiNbO3 thin films by polymeric precursor method

2000 ◽  
Vol 15 (11) ◽  
pp. 2446-2453 ◽  
Author(s):  
V. Bouquet ◽  
M. I. B. Bernardi ◽  
S. M. Zanetti ◽  
E. R. Leite ◽  
E. Longo ◽  
...  
Keyword(s):  
Thin Films ◽  
Optical Properties ◽  
Optical Transmittance ◽  
Dip Coating ◽  
Polymeric Precursor Method ◽  
Polymeric Precursor ◽  
Precursor Method ◽  
Chemical Route ◽  
Axis Orientation ◽  
Coating Solution

LiNbO3 thin films were grown on (0001) sapphire substrates by a chemical route, using the polymeric precursor method. The overall process consists of preparing a coating solution from the Pechini process, based on metallic citrate polymerization. The precursor films, deposited by dip coating, are then heat treated to eliminate the organic material and to synthesize the phase. In this work, we studied the influence of the heat treatment on the structural and optical properties of single-layered films. Two routes were also investigated to increase the film thickness: increasing the viscosity of the coating solution and/or increasing the number of successively deposited layers. The x-ray diffraction θ-2θ scans revealed the c-axis orientation of the single- and multilayered films and showed that efficient crystallization can be obtained at temperatures as low as 400 °C. The phi-scan diffraction evidenced the epitaxial growth with two in-plane variants. A microstructural study revealed that the films were crack free, homogeneous, and relatively dense. Finally, the investigation of the optical properties (optical transmittance and refractive index) confirmed the good quality of the films. These results indicate that the polymeric precursor method is a promising process to develop lithium niobate waveguides.

Crystallographic, Dielectric and Optical Properties of SrBi 2 Ta 2 O 9 Thin Films Prepared by the Polymeric Precursor Method

2002 ◽  
Vol 271 (1) ◽  
pp. 259-264 ◽  
Author(s):  
Sônia Maria Zanetti ◽  
Vanessa C. M. Sotilo ◽  
Edson R. Leite ◽  
Elson Longo ◽  
José A. Varela
Keyword(s):  
Thin Films ◽  
Optical Properties ◽  
Polymeric Precursor Method ◽  
Polymeric Precursor ◽  
Precursor Method ◽  
Dielectric And Optical Properties

Potassium niobate thin films prepared through polymeric precursor method

2004 ◽  
Vol 58 (20) ◽  
pp. 2537-2540 ◽  
Author(s):  
A.Z Simões ◽  
A Ries ◽  
C.S Riccardi ◽  
A.H Gonzalez ◽  
M.A Zaghete ◽  
...  
Keyword(s):  
Thin Films ◽  
Potassium Niobate ◽  
Polymeric Precursor Method ◽  
Polymeric Precursor ◽  
Precursor Method

Effect of Thermal Treatment on the Morphology of PLZT Thin Films Prepared from Polymeric Precursor Method

2001 ◽  
Vol 189-191 ◽  
pp. 155-160 ◽  
Author(s):  
A.H.M. González ◽  
A.Z. Simões ◽  
José Arana Varela ◽  
M.A. Zaghete ◽  
Elson Longo
Keyword(s):  
Thin Films ◽  
Thermal Treatment ◽  
Polymeric Precursor Method ◽  
Polymeric Precursor ◽  
Precursor Method ◽  
Plzt Thin Films

scholarly journals Microstructure and dielectric properties of (Ba,Sr)TiO3 thin film produced by the polymeric precursor method

2000 ◽  
Vol 15 (5) ◽  
pp. 1176-1181 ◽  
Author(s):  
F. M. Pontes ◽  
E. B. Araujo ◽  
E. R. Leite ◽  
J. A. Eiras ◽  
E. Longo ◽  
...  
Keyword(s):  
Thin Films ◽  
Dielectric Constant ◽  
Spin Coating ◽  
Dissipation Factor ◽  
Heating Process ◽  
Polymeric Precursor Method ◽  
Polymeric Precursor ◽  
Precursor Method ◽  
Chemical Homogeneity ◽  
Bst Thin Films

BaxSr1−xTiO3 (x 4 0.6) (BST) thin films were successfully prepared on a Pt(111)/TiO2/SiO2/Si(100) substrate by spin coating, using the polymeric precursor method. BST films with a perovskite single phase were obtained after heat treatment at 700 °C. The multilayer BST thin films had a granular structure with a grain size of approximately 60 nm. A 480-nm-thick film was obtained by carrying out five cycles of the spin-coating/heating process. Scanning electron microscopy and atomic force microscopy analyses showed that the thin films had a smooth, dense, crack-free surface with low surface roughness (3.6 nm). At room temperature and at a frequency of 100 kHz, the dielectric constant and the dissipation factor were, respectively, 748 and 0.042. The high dielectric constant value was due to the high microstructural quality and chemical homogeneity of the thin films obtained by the polymeric precursor method.

scholarly journals Retention characteristics in Bi3.25La0.75Ti3O12 thin films prepared by the polymeric precursor method

2005 ◽  
Vol 86 (11) ◽  
pp. 112909 ◽  
Author(s):  
A. Z. Simões ◽  
M. A. Ramirez ◽  
N. A. Perruci ◽  
C. S. Riccardi ◽  
E. Longo ◽  
...  
Keyword(s):  
Thin Films ◽  
Polymeric Precursor Method ◽  
Polymeric Precursor ◽  
Precursor Method ◽  
Retention Characteristics
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