Materials Literature
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Moderate-pressure conditions of 2 GPa has been used to stabilize the complex perovskite CeCu3Mn4O12. It can be considered as a derivative of the parent CaCu3Mn4O12 compound, by full replacement of Ca by Ce cations. The electronic injection leads to a very substantial increment of the ferromagnetic TC, up to 395 K. Thi…
The atomistic structure of the graphene buffer layer on Si-terminated SiC is investigated using a modified version of the environment-dependent interatomic potential. The determination of the equilibrium state by the conjuguate gradients method suffers from a complex multiple-minima energy surface. The initial configu…
The thickness dependence of cadmium telluride/cadmium selenide (CdTe/CdSe) heterojunctions is studied in order to maximize the performance of solar cells. The best overall performance of 3.02% efficiency at air mass 1.5 was achieved from a device with 300 nanometers (nm) of sintered CdTe and 100 nm CdSe, using indium…
The dependence of the electrical properties of Ge2Sb2Te5 on nitrogen doping concentration was investigated, which was explained based on the trends in the materials properties of nitrogen-doped Ge2Sb2Te5. The effect of nitrogen doping in Ge2Sb2Te5 on the crystallization temperature and changes upon annealing with vari…
This work reports a first-principles study of copper adhesion on Ta(110) and Ru(0001) surface with the density functional theory. Adsorption energy, electron density difference, and geometrical structures of Cu on pure, oxygen, and nitrogen doped Ta(110), Ru(0001) surfaces, and Ru doped Ta(110) surface were investigat…
Using a combination of advanced characterization tools (positron annihilation spectroscopy, conductive-tip atomic force microscopy, and high-field magnetotransport), we have studied the extension, origin and properties of the high mobility electron gas (HMEG) generated by etching the SrTiO3 surfaces with Ar+ ions. Con…
Polycrystalline Ba(Ti0.85Sn0.15)O3/Bi1.5Zn1.0Nb1.5O7 (BTS/BZN) heterostructure thin films were deposited on LaNiO3/SiO2/Si substrates by pulsed laser deposition. The leakage mechanisms of the BTS/BZN heterostructure thin films were studied in the temperature range from 303 to 403 K. At a high electric field (>1…
Characteristic voltage oscillation phenomenon is observed in an organic conductor α-[bis(ethylenedithio)tetrathiafulvalene]2I3, in the nonlinear conductivity region below the metal-insulator transition at 135 K. The oscillation, which is clearly visible in the wave form, appears only when the current is applied in the…
A durable phosphorus/silicon flame-retardant SP, which was applied on cotton fabric, was synthesized successfully with dimethyl phosphonate and methyl vinyl dichloride silane Its synthetic conditions were studied and chemical structure was confirmed by infrared spectroscopy (IR). In addition, application of the flame-…
We report that single-layer graphene on a SiO2/Si substrate withstands ion bombardment up to ∼7 times longer than expected when exposed to focused Ga+ ion beam. The exposure is performed in a dual beam scanning electron microscope/focused ion beam system at 30 kV accelerating voltage and 41 pA current. Ga+ ion flux is…
Abstract By carrying out decarbonation of CO32−-type MgAl-LDH (layered double hydroxide) using an acetate-buffer/salt solution under N2 flow, CO32−LDH was successfully converted into ClO4− and NO3−LDHs, which contain only a little residual CO32−, in one step under mild conditions. Due to the superior anion-exchangeabi…
The extensive review cited in the title discusses “a number of basic scientific questions relating to ion conduction in homogeneously disordered solids” [J. C. Dyre et al., Rep. Prog. Phys. 72, 046501 (2009)]. Although it suggests answers to some of the questions raised, its main purpose is “to draw attention to the f…
Europium gallium oxide (EuxGa1-x)2O3 thin films were deposited on sapphire substrates by pulsed laser deposition with varying Eu content from x=2.4 to 20 mol %. The optical and physical effects of high europium concentration on these thin films were studied using photoluminescence (PL) spectroscopy, x-ray diffraction…
Mobility of ferroelectric domain walls is a critical factor in the fatigue of piezoelectric ceramics. Here, reversible and irreversible domain wall motion is evaluated for lead-zirconate-titanate both before and after fatigue cycling. To this end, the small-signal permittivity at different levels of bias field is comp…
The transmission electron microscopy images of in situ prepared multiwall carbon nanotubes (MWNTs) and polyaniline (PANI) composites show that nanotubes are well dispersed in aqueous medium, and the nanofibers of PANI facilitate intertube transport. Although low temperature transport indicates variable range hopping (…
Atomistic structures of the Ge2Sb2Te5 thin film in the real phase-change disk have been investigated using transmission electron microscopy (TEM). As-deposited amorphous Ge2Sb2Te5 films were laser-irradiated for initialization (crystallization) and recording. Cross-sectional TEM observations revealed that the recordin…
Ge 15 Sb 85 is a promising material for phase-change memory applications owing to its very short crystallization times. As deposited amorphous samples of sputter deposited Ge15Sb85 have been investigated by extended x-ray absorption fine structure (EXAFS) measurements on both, Sb and Ge K absorption edges. After cryst…
This research investigated the effect of using cellulase enzyme and a mixture of enzymes (cellulase, xylanase and pectinase), under specific treatment conditions, on the physical characteristics of jute fibres. The physical characteristics such as tenacity, elongation to break, flexural rigidity and structural analysi…
We present here the results of high temperature powder x-ray diffraction study on 0.8BiFeO3–0.2Pb(Fe1/2Nb1/2)O3, which is isostructural with the well known multiferroic BiFeO3 (BF). It is shown that the room temperature ferroelectric phase of 0.8BF–0.2PFN in the R3c space group transforms to the paraelectric/paraelast…
Nanoparticles of Dy3+ and Eu3+ doped YVO4 (core) have been prepared by urea-hydrolysis in ethylene glycol medium and further heated at 500 and 900 °C to grow particles as well as remove unwanted hydrocarbon/H2O, which acts as quencher in luminescence. Samples show emission peaks at 488 (blue), 537 (green), 572 (yellow…