Materials Literature
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Neidium Pfitzer is a common genus in the freshwater diatom flora of the United States. Most Neidium taxa are large diatoms with robust features. However, several smaller, more finely organized species are also present. These species are often overlooked in collections due to their size and finer structure. Upon review…
Fragilaria lancettula was described in 1867 by Julius Schumann from freshwater material collected near Königsberg, Prussia. The limited description and presentation of two slightly different original illustrations of the valve form, has created confusion in the literature with published recombinations as varieties und…
A complete set of dielectric, piezoelectric, and elastic parameters for the textured ceramic material 0.67PMN-0.33PT is calculated by the self-consistency method with due regard for the anisotropy and piezoelectric activity of the medium. It is shown that the best piezoelectric properties corresponding to those of a s…
The effect of nanosized alumina reinforcements on the corrosion behaviour of Mg alloy AZ31B has been studied by polarisation and electrochemical impedance measurements. The corrosion resistance of the composite was superior to that of the monolithic alloy. This has been explained by considering the beneficial effect o…
We have investigated the changes in the magnetotransport properties of Sm0.55Sr0.45MnO3 manganites caused by the disorder-induced softening of the first-order magnetic phase transition into a second-order one. We analyzed the low field magnetization, magnetotransport, and specific heat in the presence of the first-ord…
We present the studies of magnetic and transport properties of the bulk Zn 1-x (Mn,Co) x GeAs 2 mixed crystals with 0.052 x 0.182 grown using direct fusion method. Magnetic investigations showed that for samples with x 0.078 we observed a behavior typical of ferromagnets, with the Curie temperatures TC 300 K. The obse…
Sm-Co thin films were prepared on Cu(111) single-crystal underlayers by changing the Sm composition from 12 to 35 at.% and the effects of Co/Sm composition on the ordered phase formation were investigated. The epitaxial SmCo5thin films were obtained for all samples. The SmCo5epitaxial layer grown on Cu underlayer has…
For RIA-simulated experiments in the NSRR with high-burnup PWR fuel and BWR fuel, numerical analyses were performed to evaluate the temporal changes of profiles of temperature and thermal stress in pellet induced by pulse power, using the RANNS code. The pre-pulse states of rods were calculated using the fuel performa…
Principal factors determining the microwave-absorption material parameters (shape, size, and chemical and phase compositions of the particles) and their dispersion relations in a range from 0.1 to 3 GHz were determined for composites containing milled Fe particles as the filling agent. The basic physical mechanisms of…
A magnetostriction phenomenological model able to include the effects of varying mechanical load is presented. The model exploits the formalism of the classical Preisach model and is therefore easy to implement, well behaved, and easy to identify. Experimental results over a real actuator showing the promising perform…
The preparation is reported of particles of photopolymerisable monomer/chiral dopant composites with a crystalline (Cr)‐chiral nematic (N*) phase transition. By mixing particles with different pitches of the N* phase in the Cr phase and crosslinking the liquid crystal (LC) monomer molecules by photopolymerisation in t…
The effects of water adsorption on the dielectric constant and leakage current of porous silica thin films were investigated. The films were prepared by the sol–gel method and their pore surfaces became hydrophobic with 1,3,5,7-tetramethylcyclotetrasiloxane (TMCTS) or hexamethyldisilazane (HMDS) vapor phase treatment.…
The dielectric constant ɛ and loss tangent tanδ of Sr 3 CuNb 2 O 9 perovskite ceramics prepared by solid-state reactions have been measured at temperatures from 300 to 900 K and frequencies from 25 to 1 × 10 6 Hz. The results demonstrate that the samples slowly cooled from the temperature of the final, high-temperatur…
The authors focus on thermal and nonthermal (radiation-induced) surface processes that affect the reflectivity of TiO2-capped multilayer mirrors used in extreme ultraviolet (EUV) lithography. Low energy electron beams mimic excitations initiated by EUV radiation. Where appropriate, comparison is made with electron bom…
Permanent gratings were written, without the aid of external fields, in planar nematic liquid crystal cells doped with only Methyl Red (MR) as well as cells doped with both Methyl Red and single-wall carbon nanotubes (CNTs). Grating formation based on trans-cis photoisomerism of MR followed by surface adsorption of th…
The capability of aqueous starch solution for reduction of Ag + ions and stabilization of metallic silver nanoparticles was examined. Kinetic parameters of formation of Ag nanoparticles were determined.
In this study, the separation of Fe–Al–Zn dross phase from hot dip galvanised zinc bath was conducted by using alternating magnetic field. The compositions of the zinc dross were detected by energy dispersive spectrum. The electrical conductivities were measured by physical properties measurement system. The separatio…
We present a new linearly scaling three-dimensional fragment (LS3DF) method for large scale ab initio electronic structure calculations. LS3DF is based on a divide-and-conquer approach, which incorporates a novel patching scheme that effectively cancels out the artificial boundary effects due to the subdivision of the…
The formation of two structurally related phases; cubic pyrochlore and monoclinic zirconolite in Bi2O3-ZnO-Nb2O5 (BZN) ternary system was investigated. Phase pure Bi4Zn4/3Nb8/3O14 synthesized via conventional solid state methods at 950oC was refined and fully indexed with space group C2 /c; lattice parameters, a = 13.…
Interlayer exchange coupling (IEC) behavior in epitaxial Co2MnSi (20 nm)/Cr/Fe (7 nm) trilayers has been investigated against Cr spacer thickness (tCr= 0.3-6.3 nm). High-quality trilayer samples have grown on a Cr (5 nm)/Au (30 nm)/Cr (15 nm) buffer layer on a MgO substrate by ultrahigh vacuum (UHV) compatible dc sput…