Influence of Preparation Conditions on Distinctive Contributions to Dielectric Behavior of CaCu3Ti4O12 Thin Films

2011 ◽  
Vol 94 (11) ◽  
pp. 3900-3906 ◽  
Author(s):  
Andreja Eršte ◽  
Barbara Malic̆ ◽  
Brigita Kužnik ◽  
Marija Kosec ◽  
Vid Bobnar
Keyword(s):  
Thin Films ◽  
Dielectric Behavior ◽  
Preparation Conditions

Dielectric behavior of Cu–GeO2 cermet thin films

2007 ◽  
Vol 42 (14) ◽  
pp. 5875-5879 ◽  
Author(s):  
Irine Banu Lucy
Keyword(s):  
Thin Films ◽  
Dielectric Behavior

Study on Preparation Conditions of Single-Oriented (002) Zr Thin Films on n-(001) Si

2000 ◽  
Vol 39 (Part 1, No. 7A) ◽  
pp. 4110-4114 ◽  
Author(s):  
Hideto Yanagisawa ◽  
Katsutaka Sasaki ◽  
Hidekazu Miyake ◽  
Yoshio Abe
Keyword(s):  
Thin Films ◽  
Preparation Conditions

Elastic Properties of Sputtered Thin Films: Influence of Different Preparation Conditions

1993 ◽  
Vol 308 ◽  
Author(s):  
C.E. Bottani ◽  
M. Elena ◽  
M. Beghi ◽  
G. Ghislotti ◽  
L. Guzman ◽  
...  
Keyword(s):  
Thin Films ◽  
Light Scattering ◽  
Hard Coatings ◽  
Elastic Behaviour ◽  
Internal Stresses ◽  
Pvd Coatings ◽  
Tin Films ◽  
Si Substrates ◽  
Preparation Conditions ◽  
First Results

ABSTRACTThis work presents the first results of a study aimed at better understanding the elastic behaviour of hard coatings produced by various techniques. This is important also in view of the need to be able to control the level of internal stresses, particularly in PVD coatings. It is well known that in extreme cases excessive internal stress can lead to complete film destruction. We devote this paper to reactively magnetron sputtered TiN, one of the most widely used compounds. Thin TiN films of different compositions were deposited on Si substrates and characterized by SEM, AES, XRD and Brillouin light scattering.

scholarly journals Dielectric tunable characteristics of compositional-gradient BaTi1−xSnxO3 thin films

2021 ◽  
Vol 11 (04) ◽  
pp. 2150019
Author(s):  
Chenjing Wu ◽  
Manwen Yao
Keyword(s):  
Thin Films ◽  
Impedance Matching ◽  
Sol Gel ◽  
Temperature Stability ◽  
Dielectric Behavior ◽  
Compositional Gradient ◽  
Dielectric Tunability ◽  
Temperature Range ◽  
Si Substrates ◽  
Low Leakage

Compositional-gradient [Formula: see text][Formula: see text]O3 thin films on Pt(100)/Ti/SiO2/Si substrates are fabricated with sol–gel using spin coating. All of the structures of the prepared thin films are of single-phase crystalline perovskite with a dense and crack-free surface morphology. BTS10/15/20 thin film exhibits enhanced temperature stability in its dielectric behavior. The temperature coefficient of capacitance [Formula: see text] in the temperature range from [Formula: see text]C to [Formula: see text]C is [Formula: see text]C and that of [Formula: see text] in the temperature range from [Formula: see text]C to [Formula: see text]C is [Formula: see text]C. Furthermore, the thin films show low leakage current density and dielectric loss. High and stable dielectric tunable performances are found in BTS10/15/20 thin films: the dielectric tunability of the thin films is around 20.1% under a bias voltage of 8 V at 1 MHz and the corresponding dielectric constant is in the range between 89 and 111, which is beneficial for impedance matching in circuits. Dielectric tunability can be obtained under a low tuning voltage, which helps ensure safety. The simulated resonant frequency of the compositional-gradient BTS thin films depends on the bias electric field, showing compositional-gradient BTS thin films could be used in electrically tunable components and devices. These properties make compositional-gradient BTS thin films a promising candidate for dielectric tuning.

Dielectric and Ferroelectric studies of Pb0.85La0.15TiO3 Thin Films on solution derived RuO2 Bottom Electrodes

2001 ◽  
Vol 672 ◽  
Author(s):  
S. Bhaskar ◽  
S. B. Majumder ◽  
P. S. Dobal ◽  
S. B. Krupanidhi ◽  
R. S. Katiyar
Keyword(s):  
Thin Films ◽  
Profile Analysis ◽  
Sol Gel ◽  
Dielectric Behavior ◽  
Tangent Loss ◽  
Film Electrode ◽  
Secondary Phases ◽  
Leakage Currents ◽  
Low Leakage ◽  
Electrode Interface

ABSTRACTSol-Gel derived Pb0.85La0.15TiO3 PLT15) thin films were deposited on solution derived RuO2/Si, RuO2/Pt/Si and Pt bottom electrodes. Dielectric, tangent loss, hysteresis, J-E, measurements were also carried out on these films. X-ray results established the single phase perovskite formation with no secondary phases of PLT15 thin film on these electrodes. PLT15 thin films on RuO2 bottom electrode showed relatively inferior ferroelectric and dielectric behavior as compared to Pt electrode. Low leakage currents (10-8 A/cm2 at 10 kV/cm) and the observed J-E characteristics have been attributed to poor film-electrode interface. Observed electrical and dielectric properties have been correlated with the film-electrode interface. The interface characteristics were further augmented by depth profile analysis using Auger Electron Spectroscopy.

Tunable topographical cellulose matrices for electro-optical liquid crystal cells

2006 ◽  
Vol 14 (4) ◽  
Author(s):  
I. Costa ◽  
P. Almeida ◽  
D. Filip ◽  
J. Figueirinhas ◽  
M. Godinho
Keyword(s):  
Thin Films ◽  
Liquid Crystal ◽  
Liquid Crystalline ◽  
Cellulose Derivatives ◽  
Free Standing ◽  
Casting Technique ◽  
Solvent Vapour ◽  
Preparation Conditions ◽  
And Control ◽  
Crystal Cells

AbstractIn this work we have used acetoxypropylcellulose (APC) to produce free standing solid films (∼60 μm) that were used for assembling electro-optical devices. Thin films were obtained from concentrated lyotropic solutions of cellulose derivatives. Induced by the cast and shearing preparation conditions wrinkles and band textures can be observed in their free-surface plane. In order to eliminate and control these textures we used a process similar to that introducted in literature [1] which consists of storing the films in the same solvent-vapour atmosphere as the solution system. Lyotropic APC liquid crystalline solutions in dymethylacetamide (DMA) with crosslinker were prepared, thin films were obtained by using a shear/casting technique and stored in the solvent-vapour atmosphere until a planar structure was achieved. The dried crosslinked films were analyzed by optical polarised microscopy (POM) and scanning electron microscopy (SEM). The films with different topographies were used to produce optical cells composed by the cellulose derivative film covered on both free surfaces by a layer of the nematic liquid crystal E7 and placed between two transparent conducting substrates. The electro-optical properties of these cells were obtained.

Sign in / Sign up

Export Citation Format

Share Document