Materials Literature
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The electronic properties of ${\mathrm{Y}}_{1\ensuremath{-}x}{\mathrm{La}}_{x}\mathrm{Ti}{\mathrm{O}}_{3}$ $(x<0.2)$ solid solution are described using the state-of-the-art $\mathrm{LDA}+\mathrm{DMFT}$ method. It is shown that both structural distortions and multiorbital electron interactions are key aspects toward…
Abstract EPR spectra on a colorless single crystal of anatase titanium dioxide have sextuplet signals under irradiation of ultra violet (uv) light at temperatures of 100‐40 K. The sextuplet is assigned to a paramagnetic species of S = 1/2 interacting with I = 5/2. The angular dependence of the sextuplet signals reveal…
Macroscopic behavior of ferromagnetic materials can be considered as the resultant of three phenomena: hysteresis, eddy current, and excess loss. Hysteresis is the behavior of the material under quasi-static variation of magnetic field. Eddy-current and excess losses are dependent on the rate of field variation and ar…
A method to control magnetization reversal in magnetic films with perpendicular magnetic anisotropy was demonstrated in this study. Alloys of rare earth-transition metals (RE-TM) with their extremely large anomalous Hall coefficient and relatively large magnetostriction constants were suitable to observe the stress in…
A series of polycrystalline samples of ${\mathrm{Sr}}_{x}{\mathrm{CoO}}_{2}$ $(0.15\ensuremath{\le}x\ensuremath{\le}0.40)$ have been prepared by a low-temperature ion exchange technique. These ${\mathrm{Sr}}_{x}{\mathrm{CoO}}_{2}$ samples are isomorphic to ${\mathrm{Na}}_{x}{\mathrm{CoO}}_{2}$ with the hexagonal struc…
The photoluminescence intensity from ion-implanted silicon can be quenched by the radiation damage implicit in the implantation. Annealing is then required before the intensity of the luminescence from a defect center is approximately proportional to the concentration of that center. Data from positron annihilation an…
A lift-off method has been developed for the fabrication of polymer dispersed liquid crystal (PDLC) displays. A polymer matrix template can be prefabricated by lifting off a PDLC film from a fluorosilanized antisticking substrate. Desirable liquid crystal can then be backfilled/infiltrated into the template. Applying…
Transparent cobalt doped MgO–Ga2O3–SiO2 nano-glass-ceramic composites were prepared from Si, Ga, Mg, and Co molecular precursors by a sol-gel method. X-ray diffraction patterns and transmission electron microscopy showed that the resulting material is composed of an amorphous silicate network that encloses nanocrystal…
Abstract A new procedure for the derivation of the approximations for temperature integral from its derivatives is presented. This procedure can produce a series of the approximations, including some published and some new ones. By combining the different order derivatives of temperature integral, a new approximation…
Magnesium ( Mg ) and its alloys are being used as structural components in industry because of their high strength-to-weight ratio and relatively high stiffness. A shortcoming of Mg based alloys is their poor corrosion and wear resistance. Therefore, coatings or surface treatment are needed for protection purpose. Thi…
Abstract Annual potassium (K) balances have been calculated over a 40‐year period for five field experiments located on varying parent materials (from loamy sand to clay) in south and central Sweden. Each experiment consisted of a number of K fertilizer regimes and was divided into two crop rotations, mixed arable/liv…
Abstract Summary: Samples of HDPE and PA6 have been melt‐processed in the presence of two new phosphazene compounds, CP‐2EPOX and CP‐2OXA together with an ethylene/acrylic acid copolymer. The blends have been prepared in an industrial twin‐screw extruder by using PA6 and PE in weight ratios of 25/75 and 75/25. When us…
Of central interest in the research of dilute magnetic semiconductors is the coupling mechanism leading to a ferromagnetic ground state. Using x-ray resonant magnetic scattering, we have analyzed the element specific magnetic hysteresis curves of Co, Ti, and oxygen in Co-doped TiO2 synthesized by ion implantation. Mag…
Heat dissipation and its effect on current in carbon nanotube (CNT) Schottky barrier field-effect transistors are studied by solving nonequilibrium Green’s function transport equation self-consistently with a heat transport equation. Temperature rise in the semiconducting CNT channel is significantly smaller than its…
In this research, the thermomechanical responses of shape memory alloy (SMA) actuators and their applications in the shape adaptive structures combining strip SMA actuators are investigated. The numerical algorithm of the three-dimensional (3-D) SMA thermomechanical constitutive equations based on Lagoudas model is de…
Electrical conductivity and photoconductivity measurements were carried out on semiconducting vanadium oxide nanowire networks synthesized through the polycondensation of vanadic acid. The temperature-dependent conductivity was described well by Mott’s optical multiphonon assisted hopping model at high temperatures an…
Abstract Summary: Poly(propylene glycol)‐grafted MWNT polyurethane was synthesized based on the hydroxyl functionalized MWNTs through a two‐step reaction. The grafted MWNTs can improve the rheological behavior of the polyol/MWNT dispersion, and have a better reinforcing effect on the mechanical properties of polyureth…
Abstract Summary: Segmented block copolymers were synthesized in melt by conversion of carboxy‐terminated poly(propylene oxide) and amino‐terminated PA12 with a selectively reacting bifunctional coupling agent bearing one oxazoline and one oxazinone group. The reaction was performed either in one or two steps. In the…
The formation of a three-dimensional network in polytetrafluoroethylene (PTFE) exposed to ionizing radiation at temperatures above the crystallite melting temperature—a phenomenon that has been revealed and studied in the last decade—is considered. A change in the structure and properties of PTFE during its radiation-…
Ag and Ag(2)S nanocrystals (NCs) were synthesized by a simple 'one-step' process. Dodecanethiol played three important roles in the synthesis: as the capping reagent, reducer (for the synthesis of Ag) and S(2-) source (for the synthesis of Ag(2)S). Due to the multifunctional characteristic of dodecanethiol, only two r…