Materials Literature
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We investigate four CuAu-I-type metallic antiferromagnets for their potential as spin current detectors using spin pumping and inverse spin Hall effect. Nontrivial spin Hall effects were observed for FeMn, PdMn, and IrMn while a much higher effect was obtained for PtMn. Using thickness-dependent measurements, we deter…
. Photoluminescence (PL) spectra of these perovskites develop a new, red-shifted peak at 1.68 eV that grows in intensity under constant, 1-sun illumination in less than a minute. This is accompanied by an increase in sub-bandgap absorption at ∼1.7 eV, indicating the formation of luminescent trap states. Light soaking…
Abstract 9–12% Cr ferritic steel structures at atomic scale were modeled by LAMMPS (Large-scale Atomic/Molecular Massively Parallel Simulator) Molecular Dynamics package with high accuracy. Embedded-Atom Model (EAM) potential parameters were applied for Fe–Fe, Fe–Cr and Cr–Cr atomic interactions. Nuclear reactor tempe…
Non-isothermal phase-field models of transition phenomena in materials with hysteresis are considered within the framework of the Ginzburg-Landau theory. Our attempt is to capture the relation between phase-transition and hysteresis (either mechanical or magnetic). All models are required to be compatible with thermod…
Well soluble composite samples of poly(methyl methacrylate) containing hybrid nanoparticles with covalently associated ZrO2 nanocrystals of an average size of (20±5) nm have been studied by light scattering, viscometry and absorption spectroscopy methods in diluted solutions. Composites were synthesized by two ways: i…
The influence of untreated and stearic acid surface pretreated calcium carbonate (CaCO 3 ) nanofiller (U1 – untreated CaCO 3 and U1S2 – stearic acid treated CaCO 3 ) on the properties of polyurethane/poly(vinyl acetate) (PUR/PVAC) polymer blends was investigated. Adhesion between fillers and polymers in the polymer bl…
The corrosion-electrochemical behavior of Ni-P coatings in acidic sulfate solutions (a pH of 0.5–2.0) has been studied. It has been found that the hydrogen evolution reaction occurs through the discharge-electrochemical desorption route. Ni-P coatings are more efficient cathode materials in acidic sulfate media than n…
The evolution of the electronic density of states at the Fermi level of intermetallic ${\mathrm{EuFe}}_{2\ensuremath{-}x}{\mathrm{Ru}}_{x}{\mathrm{As}}_{2}$ in the whole concentration range $(0\ensuremath{\le}x\ensuremath{\le}2)$ is reported. Systematic electron spin resonance investigations of the Korringa-type Eu sp…
Thermodynamical, optical and dielectric characterisation of a material possessing ferroelectric SmC* and hexatic SmB* phases has been carried out. Phase identification has been done by miscibility studies. From the dielectric studies, a relaxation mechanism is observed in the low MHz region of the SmA* phase, which is…
We report that Raman enhancements of a graphene monolayer sandwiched at the Au nanoparticle-Au thin film junction are different and can be attributed to the influence of a z-polarized incident field. Closer to the center of the junction, radial breathing like-mode (RBLM) shows dramatic Raman enhancement in terms of th…
Elastic properties of polycrystalline stabilized zirconias, namely Yttria Stabilized Zirconia (YSZ) and Scandia, Ceria Stabilized Zirconia (SCSZ), were studied by Dynamic Mechanical Analyzer (DMA) in air. Changes of storage modulus E ', loss modulus E '' and mechanical damping (tanδ) with temperature were simultaneous…
In this work, we report the electrical field tuning of magneto-phonon resonance in monolayer graphene under magnetic fields up to 9 T. It is found that the carrier concentration can drastically affect the G (E 2g ) phonon response to a varying magnetic field through a pronounced magneto-phonon resonance (MPR). In char…
There is a group of animal fibers known as “luxury fibers.” These are mohair, cashmere, camel hair, lama, alpaca, vicuna, guanaco, angora, yak, and quivit. In this study, the effects of demographical variables such as gender, education, age, sector, and income on the recognition and usage of luxury fibers in Thrace Re…
The development of lead-free piezoelectric materials have gained great attention for the consideration of environmental protection. Nanosized BaSr0.9Fe0.1TiO4, a lead free perovskite phase structured ceramic was prepared via a high-energy ball milling process through mechanically assisted synthesis. The sample was ana…
Single-layer antireflective coating (SLARC) materials and design for GaAs1_xPx/Si tandem cells were analyzed by TCAD simulation. We have shown that optimum SLARC thickness is a function of bandgap, thickness, and material quality of top GaAs1-xPx/Sisubcell. Cells are analyzed for P fractions x = 0, 0.17, 0.29, and 0.3…
We report the unique arrangement behaviour of colloidal particles at a curved oil-water interface. Particles trapped at a centrosymmetrically curved oil-water interface, formed by placing an oil lens at a neat air-water interface, organize into diverse arrangement structures due to electrostatic repulsion under the gr…
We study changes in the steady-state absorption and ultrafast transient absorption kinetics of the photoirradiated CdSe quantum dot–ZnO system. The changes enable us to reconstruct kinetics of trap creation, which are analyzed with respect to three possible models: trap creation without recovery, trap creation and rec…
During a study of the freshwater diatom flora of some hot springs on the sub-Antarctic Kerguelen Islands, an unknown Brachysira species was observed. Detailed morphological analysis using both light and scanning electron microscopy observations revealed sufficient morphological differences to separate this species as…
ABSTRACT Duck and chicken feather fibers are waste products of the poultry industry, creating a serious solid waste problem around the world. Previous works showed that feather fibers can be reused to adsorb heavy metal ions from water. To improve the adsorption capacity of feather fibers, sodium pyrosulfite (Na2S2O5)…
Oxygen-functional plasma polymers are of high interest in diverse fields such as, e.g., biomedical applications where stable surfaces are required, i.e., avoiding strong aging, leaching, and dissolution effects. Plasma polymer deposition from water vapor/acetylene mixtures is thus examined by varying energy input and…