Effects of conducting oxide barrier layers on the stability of Crofer® 22 APU/Ca3Co4O9 interfaces

2014 ◽  
Vol 29 (23) ◽  
pp. 2891-2897
Author(s):  
Tim C. Holgate ◽  
Li Han ◽  
NingYu Wu ◽  
Ngo Van Nong ◽  
Nini Pryds
Keyword(s):  
Barrier Layers ◽  
Oxide Barrier ◽  
The Stability ◽  
Image Position

Abstract

In Situ Study of Barrier Layers Using Spectroscopic Ellipsometry and Mass Spectroscopy of Recoiled Ions

2000 ◽  
Vol 619 ◽  
Author(s):  
Y. Gao ◽  
A.H. Mueller ◽  
E.A. Irene ◽  
O. Auciello ◽  
A.R. Krauss ◽  
...  
Keyword(s):  
Real Time ◽  
Mass Spectroscopy ◽  
Spectroscopic Ellipsometry ◽  
Nitrogen Concentration ◽  
Random Access ◽  
Copper Interconnects ◽  
Access Memory ◽  
Barrier Layers ◽  
The Stability

ABSTRACTAn in situ study of barrier layers using spectroscopic ellipsometry (SE) and Time-of-Flight (ToF) mass spectroscopy of recoiled ions (MSRI) is presented. First the formation of copper silicides has been observed by real-time SE and in situ MSRI in annealed Cu/Si samples. Second TaSiN films as barrier layers for copper interconnects were investigated. Failure of the TaSiN layers in Cu/TaSiN/Si samples was detected by real-time SE during annealing and confirmed by in situ MSRI. The effect of nitrogen concentration on TaSiN film performance as a barrier was also examined. The stability of both TiN and TaSiN films as barriers for electrodes for dynamic random access memory (DRAM) devices has been studied. It is shown that a combination of in situ SE and MSRI can be used to monitor the evolution of barrier layers and detect the failure of barriers in real-time.

High flux ethanol dehydration using nanofibrous membranes containing graphene oxide barrier layers

2013 ◽  
Vol 1 (41) ◽  
pp. 12998 ◽  
Author(s):  
Tsung-Ming Yeh ◽  
Zhe Wang ◽  
Devinder Mahajan ◽  
Benjamin S. Hsiao ◽  
Benjamin Chu
Keyword(s):  
Graphene Oxide ◽  
High Flux ◽  
Ethanol Dehydration ◽  
Barrier Layers ◽  
Oxide Barrier ◽  
Nanofibrous Membranes

scholarly journals Creep Instability of Ice Sheets

1976 ◽  
Vol 16 (74) ◽  
pp. 278-279
Author(s):  
Garry K.C. Clarke
Keyword(s):  
Melting Point ◽  
Ambient Temperature ◽  
Finite Thickness ◽  
Wave Number ◽  
Slab Thickness ◽  
Perturbation Equation ◽  
Rate Of Increase ◽  
The Stability ◽  
Image Position ◽  
Advection Velocity

Abstract The equation governing the growth or decay of a temperature perturbation T’ in an ice slab under shear stress σ xy is where K and k are respectively the thermal conductivity and diffusivity of ice, KB-v is the advection velocity normal to the bed and is the rate of increase of strain heating with temperature assuming a power law for flow. For a slab of infinite thickness under constant stress and at constant ambient temperature, T Fourier analysis gives -k2+a/k < o as the condition for stability where k is the wave number of a sinusoidal perturbation. When the slab has finite thickness the stability depends on the sign of the eigenvalues λm of the perturbation equation and on the boundary condition at the ice-rock interface. In general the eigenfunctions and eigenvalues must be found by approximate methods such as the Rayleigh-Ritz procedure but in the case where the stress and ambient temperature are constant over the slab thickness and there is no advection the eigenfunctions are either sines or cosines depending on the boundary conditions. In this special case the stability condition is if the bed is frozen and if it is at the melting point. The eigenvalue associated with the smallest value of m is the least stable so the maximum stable thickness is thus h = ½ π(a/K)1/2 if the bed is frozen or h = π (a/K)1/2 if it is at the melting point. For typical flow-law parameters these depths are around 250 m and 500 m respectively. The eigenvalues are related in a simple way to the growth or decay rates of the eigenfunctions: (K λm)–1 is the time constant for the mth eigenfunction. Depth-dependent stress, temperature, and advection have a marked effect on stability. A slab in which stress and temperature increase to values B and T B at the bed is considerably more stable than a slab held at constant stressσB and a constant temperature T B. Advection normal to the bed also has a major influence on stability. If the advection velocity is taken to vary linearly with depth and the bed is frozen, the effect of upward advection is to decrease stability and of downward advection to increase it. When the bed is temperate the effect of advection is more complex: downward advection increases stability but upward advection may increase or decrease it depending on the magnitude of the advection velocity.

scholarly journals Almost diagonal systems in asymptotic integration

1985 ◽  
Vol 28 (2) ◽  
pp. 143-158 ◽  
Author(s):  
H. Gingold
Keyword(s):  
Asymptotic Behaviour ◽  
Special Interest ◽  
Eigenvalue Problems ◽  
Asymptotic Integration ◽  
Linear Matrix ◽  
Linear Transformations ◽  
Matrix Differential ◽  
The Stability ◽  
Image Position ◽  
Index Problem

Consider the ordinary linear matrix differential systemψ(x) is a scalar mapping, X and A(x) are n by n matrices. Both belong to C1([a,∞)) for some integer l. The stability and asymptotic behaviour of its solutions have been subject to much investigation. See Bellman [2], Levinson [24], Hartman and Wintner [20], Devinatz [9], Fedoryuk [11], Harris and Lutz [16,17,18] and Cassell [30]. The special interest in eigenvalue problems and in the deficiency index problem stimulated a continued interest in asymptotic integration. See e.g. Naimark [36], Eastham and Grundniewicz [10] and [8,9]. Harris and Lutz [16,17,18] succeeded in explaining how to derive many known theorems in asymptotic integration by repeatedly using certain “(1 + Q)” linear transformations.

Boundedness and stabilization in a multi-dimensional chemotaxis—haptotaxis model

2014 ◽  
Vol 144 (5) ◽  
pp. 1067-1084 ◽  
Author(s):  
Youshan Tao ◽  
Michael Winkler
Keyword(s):  
Quantitative Result ◽  
Domain Of Attraction ◽  
Initial Boundary ◽  
Initial Boundary Value Problem ◽  
Flux Boundary Conditions ◽  
The Stability ◽  
Image Position ◽  
Initial Boundary Value ◽  
State 1 ◽  
Uniformly Bounded

This paper deals with the coupled chemotaxis-haptotaxis model of cancer invasion given bywhereχ, ξandμare positive parameters andΩ ⊂ ℝn(n≥ 1) is a bounded domain with smooth boundary. Under zero-flux boundary conditions, it is shown that, for anyμ>χand any sufficiently smooth initial data (u0,w0) satisfyingu0≥ 0 andw0> 0, the associated initial–boundary-value problem possesses a unique global smooth solution that is uniformly bounded. Moreover, we analyse the stability and attractivity properties of the non-trivial homogeneous equilibrium (u, v, w) ≡ (1,1, 0) and establish a quantitative result relating the domain of attraction of this steady state to the size ofμ. In particular, this will imply that wheneveru0> 0 and 0 <w0< 1 inthere exists a positive constantμ* depending only onχ, ξ, Ω, u0andw0such that for anyμ<μ* the above global solution (u, v, w) approaches the spatially uniform state (1, 1, 0) as time goes to infinity.

Topological Hopf bifurcation in the plane

1983 ◽  
Vol 93 (1) ◽  
pp. 113-119
Author(s):  
Dieter Erle
Keyword(s):  
Hopf Bifurcation ◽  
Dynamical Systems ◽  
Asymptotic Stability ◽  
Stationary Point ◽  
Parameter Family ◽  
Stability Behaviour ◽  
Closed Orbits ◽  
The Stability ◽  
Image Position ◽  
Negative System

Classical bifurcation theorems for a 1 -parameter family of plane dynamical systemsassert the presence of closed orbits clustering at some distinguished parameter value (∈ = 0, say). Here, for any ∈, the origin is the only stationary point. The topological content of the mostly analytic hypotheses imposed is some change in the stability behaviour of the origin at ∈ = 0, roughly the passing of a kind of stability to a kind of instability. Topologically speaking, e.g. some of the conditions demanded are asymptotic stability of the origin for the negative system at ∈ > 0 and asymptotic stability of the origin for at ∈ < 0 (Hopf (8), Ruelle and Takens(11)) or ∈ = 0 (Chafee(2)).

Characteristics of BST Capacitors with Aluminum Electrode and Iridium Oxide Barrier Layers

2007 ◽  
Vol 1034 ◽  
Author(s):  
Thottam Kalkur ◽  
Troung Troung
Keyword(s):  
High Frequency ◽  
Annealing Temperature ◽  
Series Resistance ◽  
Iridium Oxide ◽  
Aluminum Electrode ◽  
Barrier Layers ◽  
Post Annealing ◽  
Capacitance Voltage ◽  
Oxide Barrier ◽  
Al Metallization

AbstractThe high frequency operation of BST capacitors necessitates the development of low series resistance electrodes. As an alternative to platinum, DC magnetron sputtered IrO2/Aluminum top electrode metallization for BST capacitors has been proposed. The capacitance voltage characteristics of BST capacitors did not change significantly due to the deposition of aluminum on iridium oxide. Post annealing in nitrogen environment shows that IrO2/Al metallization does not degrade annealing temperature up to 450 oC.

The regularity and stability of solutions to semilinear fourth-order elliptic problems with negative exponents

2016 ◽  
Vol 146 (1) ◽  
pp. 195-212 ◽  
Author(s):  
Baishun Lai
Keyword(s):  
Boundary Condition ◽  
Weak Solution ◽  
Eigenvalue Problem ◽  
Nonlinear Eigenvalue Problem ◽  
Entire Solution ◽  
Extremal Solution ◽  
Stability Of Solutions ◽  
The Stability ◽  
Image Position ◽  
Nonlinear Eigenvalue

We examine the regularity of the extremal solution of the nonlinear eigenvalue problemon a general bounded domainΩin ℝN, with Navier boundary conditionu= Δuon ∂Ω. Firstly, we prove the extremal solution is smooth for anyp> 1 andN⩽ 4, which improves the result of Guo and Wei (Discrete Contin. Dynam. Syst.A34(2014), 2561–2580). Secondly, ifp= 3,N= 3, we prove that any radial weak solution of this nonlinear eigenvalue problem is smooth in the caseΩ= 𝔹, which completes the result of Dávilaet al. (Math. Annalen348(2009), 143–193). Finally, we also consider the stability of the entire solution of Δ2u= –l/upin ℝNwithu> 0.

scholarly journals The stability of the resonance set for a problem with jumping non-linearity

1987 ◽  
Vol 107 (3-4) ◽  
pp. 201-212 ◽  
Author(s):  
Marcel d'Aujourd'hui
Keyword(s):  
Nontrivial Solution ◽  
Small Perturbations ◽  
The Stability ◽  
Image Position

SynopsisFor Q ∊ L2(0, 1) we investigate the set Γ ∊ ℝ2 of pairs (α β,) for which the problem has a nontrivial solution which has exactly one zero in (0,1) and is positive near x = 0. We show that Γ is stable in a certain sense under small perturbations of Q. The dependence of Γ upon Q is illustrated by an example.

Sign in / Sign up

Export Citation Format

Share Document