Materials Literature
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The transport and magnetic properties of single crystals of ${\mathrm{La}}_{1\ensuremath{-}x}{\mathrm{Ca}}_{x}{\mathrm{MnO}}_{3}$ $(x=0.2,$ 0.3) have been investigated. The transport and magnetization results of the ferromagnetic insulator, ${\mathrm{La}}_{0.8}{\mathrm{Ca}}_{0.2}{\mathrm{MnO}}_{3},$ are quite differen…
Traditional semiconductor technology is based entirely on exploiting electron charge. Researchers are now investigating ways to use both electronic properties and electron spin simultaneously in semiconductors. The goal is the development of spintronic devices that integrate processing and storage capabilities thus fa…
A correlation between the osmotic second virial coefficient and the solubility of proteins is derived from classical thermodynamics to support an empirical relation previously found by Wilson and co-workers (1). The model is based on the equality of fugacities of the protein in the equilibrium phases, with the details…
Optical properties of single-crystal monoclinic CuO in the range $70--6000 {\mathrm{cm}}^{\ensuremath{-}1}$ were studied at temperatures from 7 to 300 K. Normal reflection spectra were obtained from the (001) and (010) crystal faces thus giving separate data for the ${A}_{u}$ and ${B}_{u}$ phonon modes excited in the…
La1-xCaxMnO3 (x = 0.3; LCMO) films of different thickness were sputter-deposited on SrTiO3(100) (STO) single crystal substrates with and without YBa2Cu3O7-d (YBCO) as template layer. The electric and magnetic properties and the microstructure of the films were studied. Clear differences in the out-of-plane lattice par…
1-Nonanethiol-capped silver nanoparticles of about 4.18 nm in diameter were prepared using a liquid−liquid two-phase method. Two-dimensional ordered superlattices of the nanoparticles were formed on carbon films coated on transmission electron microscopy (TEM) copper grids by evaporating a drop of the dispersion in ch…
A computational study of the exchange coupling is presented for a selected sample of carboxylato-bridged dinuclear copper(II) compounds. Model calculations have been used to examine the influence of several factors on the coupling constants: a) the electron-withdrawing power of the bridging ligands; b) the nature of t…
Dilute magnetic semiconductors and wide gap oxide semiconductors are appealing materials for magnetooptical devices. From a combinatorial screening approach looking at the solid solubility of transition metals in titanium dioxides and of their magnetic properties, we report on the observation of transparent ferromagne…
A theoretical model is proposed that describes the dependence of foam stability on the surfactant concentration in a foam-forming solution. The model is based on the parameters reflecting a fractal structure and percolation properties of the foam. It is established that a time corresponding to the onset of the liquid…
Transparent and crack-free Bi2Ti2O7 thin films with strong (111) orientation were successfully prepared on n-Si(100) by chemical solution deposition (CSD) using bismuth nitrate and titanium butoxide as starting materials. The growth procedure of the Bi2Ti2O7 thin films is discussed in this paper. The surface morpholog…
The results of EPR investigation of improper ferroelastic crystals MgGeF6·6H2O: Mn2+ allow to conclude that at Ti1=403 K these crystals undergo transition to structurally incommensurate phase. The order parameter of this transition is probably the angle of Mg[H2O]6 2+ octahedra rotation around crystal C3 axis, which d…
Shock waves in quasicrystals of the AlCuLi type and in approximant crystals of the C15 Laves phase have been studied by MD simulations. Three regimes are found: at low shock wave intensity the system reacts elastically, at high intensities it is turned amorphous. In the intermediate region we find a continuous transit…
An analogy between the formalism of a probabilistic approach to localized corrosion of stainless steels and the formalism of the classical approach to general corrosion of metals is highlighted. This formal analogy is justified experimentally through the study of the roughness evolution of stainless steels, iron, and…
Abstraα πle texture of Korean puffed rice snack(Yukwa) is influenced by dough viscoelasticity, cell size and disσibution in dough which are 와fected by mixing process.Mixing energy input was measured by using an am야remeter and powermeter.ηle effect of steeping time(l, 3, 6 days) and mixing time(5, 10, 15, 20 min.) on m…
The phase transitions of two ternary fluorides have been reinvestigated by thermal and X-ray diffraction analyses. Four phase transitions have been detected at T 1 = 483 ± 5 K, T 2 = 548 ± 5 K, T 3 = 765 ± 5 K and T 4 = 867 ± 5 K for Li3AlF6. Only two transformations occurred at T 1 = 550 ± 5 K and T 2 = 660 ± 10 K fo…
Measurements of the nonlinear refractive index n 2 of a high-porosity freestanding porous silicon sample are reported at different laser wavelengths by means of the z-scan technique. The results show a negative below-gap nonlinear refractive index, so that thermal contributions to the observed effects can be reasonabl…
Ferroelastic domain boundary can be regarded as a type of twin domain boundary. A twin deformation is induced in a conducting organic crystal (TMTSF)2X when the shear stress is applied. TMTSF denotes tetramethyle-tetraselenafulvalene and × does an anion such as CIO4 + and PF6 +. The boundary can move easily along one…
A system of equations describing the process of plastic deformation in a crystal is used to investigate self-sustained traveling structures theoretically. The equations for the velocity and density of dislocations are shown to describe two types of instability which are associated with anomalous damping of dislocation…
Fructose-1,6-bisphosphate aldolase (E.C. 4.1.2) catalyses the reversible cleavage of fructose-1,6-bisphosphate to dihydroxyacetone phosphate and glyceraldehyde-3-phosphate in the glycolytic pathway of prokaryote and eukaryote organisms. The enzyme was obtained from the extreme thermophile Thermus aquaticus and, in con…
Laminates consisting of natural rubber (NR) sandwiched between cloth fabric and polyester film were pulled apart at various rates and temperatures in a T-peel geometry. Peel energies for joints containing uncrosslinked or lightly-crosslinked NR did not obey simple time-temperature superposition. This behavior is attri…