Results 11 to 20 of about 82,292 (297)
Oxygen Vacancies Nucleate Charged Domain Walls in Ferroelectrics [PDF]
Physical Review Letters, 2021 We study the influence of oxygen vacancies on the formation of charged 180$^\circ$ domain walls in ferroelectric BaTiO$_3$ using first principles calculations. We show that it is favorable for vacancies to assemble in crystallographic planes, and that such clustering is accompanied by the formation of a charged domain wall. The domain wall has negative
Petralanda, Urko +3 more
openaire +4 more sources
Oxygen vacancy defects engineering on Cu-doped Co3O4 for promoting effective COS hydrolysis
Green Energy & Environment, 2023 The activation of H2O is a key step of the COS hydrolysis, which may be tuned by oxygen vacancy defects in the catalysts. Herein, we have introduced Cu into Co3O4 to regulate the oxygen vacancy defect content of the catalysts.
Guanyu Mu +7 more
doaj +1 more source
A study on the diffusion properties of oxygen in Al and W-doped λ-Ta2O5
AIP Advances, 2021 The formation energy of an oxygen vacancy and the diffusion barrier of an oxygen ion have a significant impact on the operating voltage and other parameters of resistive random access memory.
Xinghui Wu +4 more
doaj +1 more source
Oxygen vacancy segregation and space-charge effects in grain boundaries of dry and hydrated BaZrO3 [PDF]
, 2012 A space-charge model is applied to describe the equilibrium effects of segregation of double-donor oxygen vacancies to grain boundaries in dry and wet acceptor-doped samples of the perovskite oxide BaZrO3.
Adachi M. +3 more
core +2 more sources
Orienting Oxygen Vacancies for Fast Catalytic Reaction [PDF]
Advanced Materials, 2013 Catalysis is indispensable to chemical processes and relevant to many aspects of modern life. Owing to the intriguing electronic structures and good ionic properties, multivalent transition metal oxides have attracted attention as key catalysts for various energy and environmental applications.
Jeen, Hyoungjeen +6 more
openaire +3 more sources
Structural phases driven by oxygen vacancies at the La0.7Sr0.3MnO3/SrTiO3 hetero-interface [PDF]
, 2015 An oxygen vacancy driven structural response at the epitaxial interface between La0.7Sr0.3MnO3 films and SrTiO3 substrates is reported. A combined scanning transmission electron microscopy and electron energy loss spectroscopy study reveal the presence ...
Boschker, J.E. +6 more
core +1 more source
Charge-Transfer Induced by the Oxygen Vacancy Defects in the Ag/MoO3 Composite System
Nanomaterials, 2021 In this paper, an Ag/MoO3 composite system was cosputtered by Ar plasma bombardment on a polystyrene (PS) colloidal microsphere array. The MoO3 formed by this method contained abundant oxygen vacancy defects, which provided a channel for charge transfer ...
Qi Chu +7 more
doaj +1 more source
Thermodynamics of mono and di-vacancies in barium titanate [PDF]
, 2012 The thermodynamic and kinetic properties of mono and di-vacancy defects in cubic (para-electric) barium titanate are studied by means of density-functional theory calculations. It is determined which vacancy types prevail for given thermodynamic boundary
Albe, Karsten, Erhart, Paul
core +1 more source
Sensors, 2017 The density of oxygen vacancies in semiconductor gas sensors was often assumed to be identical throughout the grain in the numerical discussion of the gas-sensing mechanism of the devices.
Jianqiao Liu +5 more
doaj +1 more source
Magnetically active vacancy related defects in irradiated GaN layers [PDF]
, 2012 We present the studies of magnetic properties of 2 MeV 4He+-irradiated GaN grown by metal-organic chemical-vapor deposition. Particle irradiation allowed controllable introduction of Ga-vacancy in the samples.
Kilanski, L. +3 more
core +2 more sources