نتایج جستجو برای: dielectric constant

تعداد نتایج: 251841  

2012
A. Srivastava

Studies of Metal–insulator–metal (MIM) capacitors having high-κ La2O3\HfO2 dielectric stacks are fabricated using Pulse Laser Deposition (PLD) is carried out. Nano-sized La2O3\HfO2 dielectric stacks are deposited using PLD system under optimized pressure, substrate temperature and numbers of shots inside argon ambient chamber. The morphology of dielectric stacks is examined using AFM and the th...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 1963
O Halpern

* This work was supported by a grant from the National Science Foundation. 'Yarmolinsky, M. B., and G. L. de la Haba, these PROCEEDINGS, 45, 1721 (1959). 2 Nathans, D., and F. Lipmann, these PROCEEDINGS, 47, 497 (1961). 3Wecker, E., and E. Schonne, these PROCEEDINGS, 47, 278 (1961). 4 Wecker, E., and A. Richter, in Basic Mechanisms in Animal Virus Biology, Cold Spring Harbor Symposia on Quantit...

1997
B. Sareni A. Beroual C. Brosseau

The randomness in the structure of two-component dense composite materials influences the scalar effective dielectric constant, in the quasistatic limit. A numerical analysis of this property is developed in this paper. The computer-simulation models used are based on both the finite element method and the boundary integral equation method for twoand three-dimensional structures, respectively. ...

2015
Y. D. Kolekar L. J. Sanchez C. V. Ramana

Articles you may be interested in Impedance spectroscopic characterization of gadolinium substituted cobalt ferrite ceramics Correlation between structural, magnetic, and dielectric properties of manganese substituted cobalt ferrite Influence of manganese substitution on the microstructure and magnetostrictive properties of Co1−xMnxFe2O4 (x=0.0–0.4) ferrite Enhanced reflection loss characterist...

2000
Philip M. Reppert Dale Morgan M. Nafi Toksoz

Ž . A method to determine ground-penetrating radar GPR velocities, which utilize Brewster angles, is presented. The method determines the relative dielectric constant ratio at interface boundaries where the radar wave is traveling from a low-velocity to a high-velocity medium. Using Brewster angle analysis is currently the only means to determine the velocity of the medium below the deepest det...

2011
Hussain A. Badran

Problem statement: The some optical constants polymer thin film with red dye 3-amino-7dimethylamino-2-methyl phenazine (NR) as the guest material and Polyvinylpyrrolidone (PVP) as the host material were prepared by adulteration and spin-coating methods. Approach: The values of some important parameters (refractive index n, extinction coefficient K and dielectric constant ε∞) of polymer thin fil...

2009
K. Sarabandi

The behavior of electromagnetic waves can be controlled by controlling the constitutive parameters of the medium in which EM waves propagate. This can be accomplished to some extent by mixing different materials with different pemittivities, permeabilities, and conductivities as shown in the previous chapter. It was shown that the effective permittivity of a composite medium is not only a funct...

1996
B. Sareni C. Brosseau

We present computer simulation data for the effective permittivity ~in the quasistatic limit! of a system composed of discrete inhomogeneities of permittivity e1 , embedded in a three-dimensional homogeneous matrix of permittivity e2 . The primary purpose of this paper is to study the related issue of the effect of the geometric shape of the components on the dielectric properties of the medium...

2012
Elena Castellano-Hernández Francisco B Rodríguez Eduardo Serrano Pablo Varona Gomez Monivas Sacha

The use of electrostatic force microscopy (EFM) to characterize and manipulate surfaces at the nanoscale usually faces the problem of dealing with systems where several parameters are not known. Artificial neural networks (ANNs) have demonstrated to be a very useful tool to tackle this type of problems. Here, we show that the use of ANNs allows us to quantitatively estimate magnitudes such as t...

2002
Timothy W. Miller Brian Borchers Jan M. H. Hendrickx Sung - Ho Hong Louis W. Dekker Coen J. Ritsema

-Field experience has shown that soil conditions can have large effects on Ground Penetrating Radar (GPR) detection of landmines. We discuss available models for the prediction of the dielectric constant from soil physical properties including bulk density, soil texture, and water content. The soil dielectric constant determines the attenuation of the radar signal. The contrast between the diel...

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