Results 211 to 220 of about 558,175 (268)

Electrode and Microstructure Dependence of Oxygen Diffusion in Ferroelectric Hafnium Zirconium Oxide Thin Films

Advanced Functional Materials, EarlyView.
Significant nanoscale oxygen diffusion coefficient variations are measured in ferroelectric hafnium zirconium oxide films with grain boundaries and electrode interfaces exhibiting values 104 times larger than the grain cores. Overall coefficients are 10X larger for films prepared with metal nitride electrodes compared to refractory metals. New insights
Liron Shvilberg, Thomas W. Pfeifer, Chuanzhen Zhou, Yong Kyu Choi, Duk‐Hyun Choe, Patrick E. Hopkins, Jon F. Ihlefeld   +6 more
wiley   +1 more source

Historical Foundation and Practical Guideline for Ferroelectric Switching Kinetic Studies

Advanced Functional Materials, EarlyView.
The P and U pulses in the conventional PUND measurements are not identical because of the interplay between switching current and the measurement circuit components. This circuit effect can lead to a shift in polarization transients and misinterpreted physics in the switching kinetics.
Yi Liang, Pat Kezer, John T. Heron
wiley   +1 more source

Glissile Interphase Boundaries Enable Collective Phase Switching in Epitaxial Polar Oxides

Advanced Functional Materials, EarlyView.
A triple point is identified in the phase diagram of low‐symmetry epitaxial BiFeO3 thin film along with an extended regime of phase competition associated with a flattened energy landscape. The electromechanical response is shown to be governed by correlated interphase‐boundary motion, including scale‐free avalanche dynamics characteristic of systems ...
Mohammad Moein Seyfouri, Oliver Paull, Ralph Bulanadi, Yasuhiro Sakamoto, Shintaro Yasui, Mikayla Lord, Mahak Chhabra, David Walker, Patrycja Paruch, Shery Chang, Nagarajan Valanoor, Daniel Sando   +11 more
wiley   +1 more source

Chiral Phase Change Nanomaterials

Advanced Functional Materials, EarlyView.
This work demonstrates reversible, non‐volatile phase transitions in chiral Ge2${\rm Ge}_2$Sb2${\rm Sb}_2$Te5${\rm Te}_5$ (GST) nanohelices for high‐speed optical modulation of chirality and dynamic control of the state of polarization (SOP). The chiral nanostructures are fabricated using a highly directional, wafer‐scale physical vapor deposition ...
Joshua A. Burrow, Md Shah Alam, Riad Yahiaoui, Evan M. Smith, Ryan Laing, Jules Gardener, Thomas A. Searles, Piyush J. Shah, Shivashankar Vangala, Joshua R. Hendrickson, Andrew M. Sarangan, Imad Agha   +11 more
wiley   +1 more source

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VERTICAL DIFFERENTIATION AND THE DISTRIBUTION OF INCOME

Bulletin of Economic Research, 2006
The paper analyses the effects of income concentration on the behaviour of a duopoly with vertical product differentiation and uncovered market. By using a trapezoid distribution, we solve explicitly for market equilibrium as a function of a mean preserving spread of the income distribution. We show that overall more concentrated incomes imply stronger
BENASSI, CORRADO, A. Chirco, C. Colombo
openaire   +4 more sources

Distributing vertices on Hamiltonian cycles

Journal of Graph Theory, 2011
AbstractLet G be a graph of order n and 3≤t≤n/4 be an integer. Recently, Kaneko and Yoshimoto [J Combin Theory Ser B 81(1) (2001), 100–109] provided a sharp δ(G) condition such that for any set X of t vertices, G contains a hamiltonian cycle H so that the distance along H between any two vertices of X is at least n/2t.
Faudree, Ralph J., Gould, Ronald, Jacobson, Michael S., Magnant, Colton   +3 more
openaire   +2 more sources

On the vertical distribution of 〈ũw̃〉

Coastal Engineering, 1995
Abstract The aim of this paper is to present an analytical expression for the vertical distribution of the correlation between the horizontal (ũ) and vertical (w) wave velocity components. This quantity, 〈ũw〉, which appears explicitly in the time-averaged momentum balance equations, has been shown to play an important role in the vertical ...
Francisco J. Rivero, Agustín S. Arcilla
openaire   +1 more source

The Vertical Distribution of Halocarbons in the Stratosphere

1985
By means of cryogenic sampling and subsequent gaschromatographic analysis vertical profiles of CCl4, CFC13, CF2C12, CF3CI, CF4, C2F3C13, C2F4Cl2, C2F5C1, C2F6, CH3C1, CH3CC13 and CHF2C1 were derived up to 35 km. Halocarbon profiles computed with one-dimensional and two-dimensional models fall off less rapidly with height than the measured profiles ...
Fabian, P., Borchers, R., Gömer, D., Krüger, B., Lal, S., Penkett, S.   +5 more
openaire   +2 more sources

Vertical Distribution of Atmospheric Ozone

Nature, 1951
ON February 25, March 4, March 16 and April 18, 1950, sounding-balloon flights were carried out for the spectrographic determination of the vertical distribution of ozone in the lower stratosphere.
openaire   +2 more sources