Materials Literature
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Magnetic nanogranular FeCoTiO films have been deposited by radio frequency magnetron cosputtering. By simply adjusting the thickness of films, the imaginary permeability spectrum of FeCoTiO films changed from a single ferromagnetic resonance peak to double resonance peaks. Based on this phenomenon, multilayered [FeCoT…
Microstructural investigations of granular perpendicular recording media based on stacked CoPt-alloy layers were carried out using high-resolution transmission electron microscopy (HRTEM). In the structure investigated, a thin layer of CoPt with high Pt concentration was inserted to meet the thermal stability requirem…
Abstract In this contribution, we briefly review the results of collaborative research between crystallography groups in St. Petersburg and Kiel, and report on the synthesis and crystal structure of Tl16(SiO4)2(SO4)(OH)6 (1), a new and unusual compound obtained from highly-alkaline TlOH solution. Its structure [monocl…
In this paper, we report the intrinsic characteristics of conducting polymer for gas-sensor at high frequency region, i.e., 500 MHz to 10 GHz. To investigate the high-frequency characteristics of conducting polymer (CP), a coplanar waveguide electrode (CPW) is utilized. First, a CPW without CP, i.e., an open CPW, is s…
Presently, fission chamber technology utilizes neutron-sensitive coatings often composed of radioisotopes that are becoming increasingly difficult to obtain. Using only natural uranium and thorium, a maximized stable device lifetime in a constant neutron flux can be obtained by optimizing the regenerative fission cham…
In this paper, a new equivalent circuit model of GaN-based light emitting diodes (LEDs) is established. The impact of the series resistance to luminous efficacy is simulated using the MATLAB software. GaN-based LEDs with different n-contact electrode materials (LEDs with Ni/Au and LEDs with Cr/Au) are fabricated. By c…
Fabricating high-density integrated circuits require three dimensional electrode lines with high aspect-ratio. Nowadays, many electrode lines for electronic circuits are fabricated by printing technologies to give simple and environmental friendly fabrication technique. However, most applications of printing technolog…
In this paper, we have reported an investigation on the evolution of nitrogen structures in diamond crystals which contain nitrogen donor atoms in the range of 1500 ppm–1600 ppm following an annealing treatment at a high pressure of about 6.5 GPa and high temperatures of 1920 K–2120 K. The annealing treatment was foun…
Previously fabricated electronic devices were used for vacuum manufacturing processes such as conventional semiconductor manufacturing. However, they are difficult to apply to continuous processes such as roll-to-roll printing, which results in very high device manufacturing and processing costs. Therefore, many devel…
Density functional theory calculations of the energy of magnetic anisotropy in GeMnTe were performed using OpenMX package with fully relativistic pseudopotentials. The discussion of microscopic origin of magnetic anisotropy was conducted. The main conclusion is that the magnetic anisotropy is caused by interplaty betw…
The physicochemical, regulatory, and kinetic properties of malate dehydrogenase (EC 1.1.1.37) from haloalkaliphilic purple nonsulfur Rhodovulum steppense bacteria, strain A-20s, were studied. The malate dehydrogenase (MDH) preparation with a specific activity of 0.775 ± 0.113 U/mg protein was obtained in an electropho…
This paper presents an analytical method for the calculation of magnetic field distribution, electromagnetic performances and equivalent circuit parameters of multiphase double cage rotor induction motors in healthy and broken bars condition. The proposed static model takes into account stator and rotor slotting and s…
It has been shown that composite materials based on epoxy resins reinforced with a carbon cloth can be potentially used to develop antifriction coatings for operating surfaces of sliding shutters for oil-trunk pipelines. It is less preferable to use wear-resistant compositions containing ceramic particles for the give…
X-ray, scanning probe, and high-resolution translucent electron microscopy techniques were used to investigate the structural and morphological features of super- and nanodispersed powders produced by the plasma chemical repeated condensation of mixtures of vanadium carbide or nitride with nickel in low-temperature (4…
We have investigated the atomic relaxation processes in phase-separated alloy melts using quasielastic neutron scattering. Among the three alloy melts studied ( i.e. , Al 30 Cu 20 Sn 50 , Al 30 Cu 30 Sn 40 and Y 28 Ti 28 Al 24 Co 20 ), Y 28 Ti 28 Al 24 Co 20 is not only a phase-separated melt but also vitrified upon q…
Single walled carbon nanotubes (SWCNTs) form a special class of carbon materials with high electric and thermal conductivity. Ordinary SWCNTs exist in the form of bundles, primarily because of intertubular van der Waals attraction. Here we show that silica nanoparticles (NPs) with tunable surface energy can be used as…
Structural, electrical and moisture resistant properties of highly transparent conductive polycrystalline Ga and In co-doped ZnO (IGZO) films deposited on high gas barrier plastic substrates and alkali-free glass at below 100 °C by DC magnetron sputtering method were investigated. All the IGZO films in the Ga2O3 conce…
We present the first part of a study supported by the French Ministry of Defense, entitled SAFAS, which aims at developing a low profile self-complementary radiating surface with low signature. This surface concept is intended to be used for antenna and absorber designs. We show some preliminary results for an antenna…
Off-diagonal magnetoimpedance in amorphous cobalt-based microwire with helical magnetic anisotropy is investigated using a DC bias current. It is demonstrated that the circular magnetic field generated by the bias current improves the sensitivity to an axial external magnetic field, raises the output voltage peak, and…
Treatment of acute myocardial infarction in the future should focus not only on improving acute treatment, as it has been done over the past decades, but also on secondary prevention of left ventricular dysfunction and/or progression to heart failure by preserving left ventricular shape, avoiding left ventricular remo…