Materials Literature
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The optical parameters (namely, the complex dielectric tensor and refractive indexes) of sodium nitroprusside dihydrate (SNP), ${\mathrm{Na}}_{2}$[Fe(CN${)}_{5}$NO]\ensuremath{\cdot}2${\mathrm{H}}_{2}$O (orthorhombic, space group ${D}_{2h}^{12}$) in the infrared (ir) region 1550--2250 ${\mathrm{cm}}^{\mathrm{\ensurema…
The diffuse x-ray scattering surrounding satellite reflections caused by charge-density waves has been measured at two different temperatures and analyzed in terms of phason scattering. From this analysis, the phason velocity has been obtained for all directions of propagation.
Simultaneous electron paramagnetic resonance (EPR) and optical absorption studies were carried out at room temperature in a Ge-doped silica fiber-optic waveguide following in situ ultraviolet (UV) irradiation with 254-nm (4.88-eV) photons. We have observed that the UV-induced EPR is directly correlated with the UV-ind…
The one-electron energy spectrum of a Penrose tiling lattice in a magnetic field is studied with a tight-binding Hamiltonian. We show the following remarkable results characteristic of a Penrose lattice. (1) The density of states in a magnetic field has a central peak with zero width at zero energy. It is shown that t…
Abstract The oxidative degradation of polybutadiene–styrene–acrylonitrile (ABS) copolymer was extensively investigated. Three factors were studied: the influence of ageing temperature on the rate of the oxidation of the copolymer; the efficiency of β‐carotene as chain breaking antioxidant; and the effect of butadiene…
Abstract Three vinyl monomers, 2,4,6‐trimethoxystyrene, 4‐( N,N ‐dimethylamino)styrene, and N ‐methyl‐2‐vinylpyrrole, were synthesized via the Wittig reaction from the corresponding aldehyes. These monomers were homopolymerized by radical polymerization using α,α′‐azoisobutyronitrile (AIBN) as initiator at 60°C. The r…
Detailed measurements on the dc-voltage dependence of the Young's modulus E, shear modulus G, and their associated internal friction, in ${\mathrm{NbSe}}_{3}$ below both charge-density-wave (CDW) transitions, are reported. As for ${\mathrm{TaS}}_{3}$ [Phys. Rev. B 36, 2969 (1987)], the moduli decrease when the CDW bec…
Photoemission from O 2s--derived levels appears at binding energies (BE) between \ensuremath{\sim}14 and \ensuremath{\sim}33 eV. It has been investigated systematically by photoelectron spectroscopy with synchrotron radiation for a variety of oxygen-containing adsorbates on Pt(111), Ge(001), and Si(001) surfaces. On P…
Permanent magnetic materials containing the intermetallic compound Nd2Fe14C were obtained by annealing melt-spun flakes. As quenched flakes with compositions close to the stoichiometric composition consist of α-Fe, Nd2Fe17 with some dissolved carbon, and an amorphous phase. At approximately 700 °C Nd2Fe14C is formed i…
The Dzyaloshinski-Moriya (DM) anisotropic superexchange constant and the resulting electron-paramagnetic-resonance (EPR) linewidth in Mn-based II-VI-compound diluted magnetic semiconductors (DMS) such as ${\mathrm{Cd}}_{1\mathrm{\ensuremath{-}}\mathrm{x}}$${\mathrm{Mn}}_{\mathrm{x}}$Te are calculated quantitatively. A…
A comprehensive review of diffusion phenomena in thin films and microelectronic materials - theory and technology. Contents include: Bulk Solids and Thin Films Anelastic Relaxation and Diffusion in Thin-Layer Materials Diffusion in Artificially Modulated Thin Films Diffusion and Growth in Oxide Films Diffusion Induced…
The dc electrical resistance of a polymer-graphite composite has been studied in high magnetic fields (<10 T) and at low temperatures for different concentrations of graphite. The resistivity of the composites for the high graphite concentrations was much greater (${>10}^{4}$) than that of pure graphite, and abo…
The temperature-dependent electronic structure of 1 T -TaS 2 near the Fermi level, determined by means of angle-resolved photoemission with high-energy resolution of 35 meV, exhibits a distinct energy gap associated with a metal-semiconductor transition at 180 K on cooling, whereas on warming up the retransformation o…
We report on molecular-dynamics simulations to determine the steady-state velocity versus temperature relation for (001) solidification and melting of silicon using the Stillinger-Weber potential to model the interactions between the silicon atoms. Down to 250 K of undercooling, the simulation values show good agreeme…
Diagrammatic valence-bond (DVB) theory is extended to dynamic nonlinear susceptibilities of interacting π electrons in Pariser–Parr–Pople (PPP) or other quantum cell models whose correlated ground state ‖G〉 is known. Corrections φ(1)(ω) and φ(2)(ω2,ω1) to ‖G〉 due to oscillating electric fields are found directly as li…
Abstract From an industrial point of view, it is effective to have a relation between process conditions and resulting product properties. In practice there are many possible process conditions, whereas properties are generally interrelated in a complex way. Thus, there is a strong need for a physical understanding of…
A molecular model has been constructed for glycerol and has been applied to a study of clusters and condensed phases by molecular dynamics simulation. Each molecule is regarded as a flexible polar complex of nine mass points (CH and CH2 groups are treated as ‘‘united atoms’’). Periodic arrays stabilize in a close appr…
The transient nematic effect, together with multiple pass technique and optimal temperature effect, was employed to demonstrate high-speed liquid-crystal modulators. As a result, nematic liquid-crystal modulators with frame time less than 50 μs have been achieved in the visible spectral region.
The III-V compound GaAs was studied using energy-dispersive x-ray diffraction with a synchro- tron source up to a pressure of 108 GPa. When the pressure was increased to 16.6 GPa, the GaAs sample transformed from the zinc-blende structure to an orthorhombic structure [GaAs(II)], space group Pmm2, consisting of a primi…
Abstract Composites of polypropylene (PP) or maleic‐anhydride‐modified polypropylene (MPP) with refiner ground pulp (RGP) were prepared under various kneading conditions (mixing temperature, rate of rotation, and mixing time) and evaluated for their tensile strength (σ max ), break elongation (ϵ max ), and Young's mod…