Materials Literature
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The static director distribution in thin nematic liquid crystal cells, subject to both electric and magnetic fields, has been investigated using a combination of deuterium nuclear magnetic resonance (NMR) spectroscopy and continuum theory in terms of the director distribution function, which gives the probability dens…
Presented here are the results of Rietveld analysis of powder neutron diffraction data, which reveal that both the ferroelectric and antiferrodistortive phase transitions occur together at T ∼ 925 K during heating, leading to a change in crystal structure from room temperature rhombohedral phase in the R3c space group…
A guanidinium compound, [C(NH(2))(3)](5)SO(4)(SO(3)-OC(2)H(5))(2)F, with complex anionic sublattice has been synthesized and characterized by calorimetric and dielectric measurements at ambient and high hydrostatic pressures, as well as by single-crystal X-ray diffraction at varied temperatures. At room temperature, t…
Abstract The objective of this study was to determine the mechanical and viscoelastic properties of extruded cylindrical strands from biodegradable polymer blends and to verify the correlation of the blend properties with their capacity to form films in the blown extrusion process. The production of biodegradable film…
The influence of carbon nanotube geometry and morphology on complex permittivity (both ɛ′ and ɛ″) was investigated. In a dilute complex system, it was found that single walled carbon nanotubes (SWNTs) composites can obtain a higher relative dielectric permittivity due to the largest length/diameter aspect ratio (A. R.…
Self-formation of the surface protective layer on dilute CuAl alloys by annealing in inert atmospheres is investigated with thermodynamic consideration, first principles density functional simulation, and transmission electron microscopy (TEM). The calculations predict that when Cu atoms are involved in the surface Al…
Lanthanum strontium manganite La 0.7 Sr 0.3 MnO 3 thin films have been grown successfully on Si(001) by metal‐organic chemical liquid deposition technique using acetate as the starting materials, and acetic acid and deionized water as the solvent. Crack free, low surface roughness, preferential orientation films with…
We present a rigorous comparison between resistivity data and theoretical predictions involving the theory of Palasantzas [G. Palasantzas and J. Barnas, Phys. Rev. B 56, 7726 (1997)], and the modified Sheng, Xing, and Wang-fractal theory [R. C. Munoz et al., Phys. Rev. B 66, 205401 (2002)], regarding the resistivity a…
10.1209/0295-5075/95/34004
Single-phase CaCu3Ti4O12 (CCTO) was synthesized by solid-state reaction. Electron backscatter diffraction, scanning electron microscopy, and atomic force microscopy were adopted to characterize the grain orientation, microstructure, and surface morphology of the CCTO samples with or without thermal etching. Bump strai…
In this work, we study theoretically the resonant coupling between longitudinal optical surface vibrations of Si-OH and/or Si-O-Si and electron and hole states in the silicon nanocrystals (Si NCs) within light emitting porous Si (PSi) thin films in the framework of the Fröhlich interaction. The results of this analysi…
Abstract Na 3 Gd 2 (BO 3 ) 3 crystals with dimensions up to 22 × 20 × 5 mm 3 has been grown from NaBO 2 flux by the top‐seeded solution growth (TSSG) method for the first time. Differential scanning calorimetry (DSC) result shows that Na 3 Gd 2 (BO 3 ) 3 melts incongruently. The infrared spectrum indicates that Na 3 G…
Abstract The influence of styrene as a reactive diluent on the morphology of vinylester resin‐clay hybrids has been studied. Two mixtures of diglycidylether of bisphenol‐A diacrylate as vinyl ester resin and styrene (20 and 40%) were prepared. Various weight ratios of styryl‐functional organoclay were added to vinyles…
The effects of the action of hydrogen peroxide (H 2 O 2 ) as an oxidizing agent on the electrical properties of polyaniline-aluminium (PANI-Al) composites are studied. Direct current (dc) electrical conductivity is investigated in the temperature range 303–453 K. A decrease in the conductivity with attack time is obse…
Ferroelectric domains have been created in single-crystal ∼1 μm thick LiTaO3 films using the tip of an atomic force microscope. The presence of a domain with a polarization that is oriented in the opposite direction as compared to the applied field in the center of the domains created by the tip is reported. This pape…
The tetragonally distorted antiperovskite Mn3CuN exhibits large magnetostriction of up to 2000 ppm, due to the ferromagnetic shape memory effect. Magnetocrystalline anisotropy, which is deeply involved in the magnetostriction, is investigated for Mn3CuN via quantitative evaluation of spin and orbital magnetic moments…
Abstract Viscoelastic properties, morphology, and thermal stability of rigid and plasticized poly(vinyl chloride)/poly (methyl methacrylate) (PVC/PMMA) blends were studied. For that purpose, blends of variable composition from 0 to 100 wt% were prepared in the presence (15, 30, and 50 wt%) and in the absence of di(2‐e…
Abstract Resins and crosslinking agents have been used on textiles for a long time for various purposes. Fiber blend fabrics have a propensity to pill, thereby giving garments a spoiled surface appearance. The pilling should be reduced or prevented by application of an appropriate finishing method. Surface modificatio…
Based on photo-stimulated discharge (PSD) theory about release of charges from the mono- and multi-levels of traps, two methods on the energy distribution of trapped charges (charge distribution)—step scanning method and combined calibration–scanning method are proposed. The typical polymeric dielectric, low-density p…
We present the magnetotransport studies of Ge1−xMnxTe ferromagnetic semiconductor under hydrostatic pressure. The investigation of the normal and Hall resistivities provide an insight to the dependence of carrier concentration, mobility, and magnetic properties on pressure. Our results reveal that the application of p…