Materials Literature
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Preface Crystallography Geometrical Representation of Crystals X-Rays Neutrons Diffraction Diffraction Peak Intensity and Measurement Two-Dimensional Recording Methods Phase Analysis Diffraction from More Complex Structures Stress Analysis Other Kinds of Materials Characterization Using Diffraction Appendix A: Some Cr…
We present evidence for the coexistence of ferromagnetic metallic and charge-ordered insulating phases in strained thin films of ${\mathrm{La}}_{0.67}{\mathrm{Ca}}_{0.33}{\mathrm{MnO}}_{3}$ at low temperatures. Such a phase-separated state is confirmed using low-temperature magnetic force microscopy and magnetotranspo…
In their Letter (Phys. Rev. Lett. 83, 5118 (1999)), den Brink, Khaliullin, and Khomskii proposed theoretically that the one-dimensional ferromagnetic zigzag chains in CE phase in half-doped manganites play an essential role in forming the orbital ordering, and, more surprisingly, the on-site Coulomb interaction U betw…
The structural properties of MgB2 superconductors have been analyzed by means of convergent-beam electron diffraction, high-resolution transmission-electron microscopy, and theoretical simulations. The MgB2 crystal has been identified to have a hexagonal structure with the space group of P6/mmm. Microstructural featur…
A mean-field model of ferromagnetism mediated by delocalized or weakly localized holes in zinc-blende and wurzite diluted magnetic semiconductors is presented. The model takes into account strong spin-orbit and $k\ensuremath{\cdot}p$ couplings in the valence band as well as the influence of strain upon the hole densit…
Abstract Thin films were blown from a composition of 75% linear low density polyethylene (LLDPE) and 25% LDPE. The LLDPE content was made up of different % of metallocene‐based and conventional octene‐based LLDPE. Tensile strength, dart impact strength, hot tack strength, heat seal strength, and the barrier properties…
Abstract Silicon oxycarbides undergo SiO and SiC bond redistribution when heated in an inert atmosphere above 900°C. This redistribution has a great influence on the mechanical, thermal, and oxidative stability properties of Blackglas™ ceramic. Based on a statistical method, three independent thermal redistribution…
Thin films of Ge/Al 2 O 3 were prepared using the pulsed laser deposition method. XRD and AFM confirmed that the structure consists of Ge nanoparticles embedded in amorphous Al 2 O 3 matrices. A blue PL from the films was found in the wavelength region of 400-550 nm with two distinct humps in the peak. The origin of t…
Abstract A series of isotactic polypropylenes were investigated to account for total defect content using xylene fractionation and carbon‐13 NMR experimental methods. The defects of interest were percent atactic content, copolymer content, and configurational defects. Experimental equilibrium melting temperatures were…
The new compounds K(2)TiCu(2)S(4), Rb(2)TiCu(2)S(4), Rb(2)TiAg(2)S(4), Cs(2)TiAg(2)S(4), and Cs(2)TiCu(2)Se(4) have been synthesized by the reactions of A(2)Q(3) (A = K, Rb, Cs; Q = S, Se) with Ti, M (M = Cu or Ag), and Q at 823 K. The compounds Rb(2)TiCu(2)S(4), Cs(2)TiAg(2)S(4), and Cs(2)TiCu(2)Se(4) are isostructur…
We have prepared ${\mathrm{La}}_{1\ensuremath{-}x}{\mathrm{Sr}}_{x}{\mathrm{MnO}}_{3+\ensuremath{\delta}}$ single crystals for not only oxygen-deficient $(\ensuremath{\delta}<0)$ but also oxygen-excess $(\ensuremath{\delta}>0)$ regions. Although resistivity $\ensuremath{\rho}(T)$ is less sensitive to $\ensuremat…
Three cyano-bridged aqua(N,N-dimethylacetamide)(cyanoiron)lanthanide complexes were synthesized by the reaction of K3Fe(CN)6, Ln(NO3)3⋅6 H2O (Ln=Sm, Gd, Ho), and N,N-dimethylacetamide (DMA). The obtained complexes 1 – 3 exhibit different coordination geometries and crystal structures. The polymeric {[Sm(DMA)2(H2O)4Fe(…
Abstract Equilibrium sorption and uptake kinetics of n ‐butane and n ‐pentane in uniform, biaxially oriented, semicrystalline polyethylene terephthalate films were examined at 35 °C and for pressures ranging from 0 to approximately 76 cmHg. Sorption isotherms were well described by the dual‐mode sorption model. Sorpti…
Abstract The effects of interchange reactions on the solid‐state structure and mechanical properties of a 70/30 poly(ethylene terephthalate) (PET)/bisphenol A polycarbonate (PC) blend were studied. Increasing reaction levels were obtained by means of lower screw speeds in the extruder. The progressive production of co…
We measured the pressure dependence of the room-temperature infrared absorption spectrum of the pseudocubic ${\mathrm{La}}_{0.75}{\mathrm{Ca}}_{0.25}{\mathrm{MnO}}_{3}$ manganite. On increasing pressure up to 10 Gpa we observe the increase of a broad band associated with polaronic absorption, which partially screens t…
Low-temperature growth of AlxGa1-xAs by the solution-liquid-solid mechanism affords nanowhiskers having two specific overall compositions: x = 0.1 and 0.8. Intermediate compositions (0.1 < x < 0.8) are inaccessible by the method employed. Examination of the nanowhiskers by transmission electron microscopy, photolumine…
Abstract A number of N ‐substituted poly(aspartic acid)s was prepared under mild conditions using the silylation–alkylation technique. Their physical properties were studied. Free swelling capacity (FSC) tests were performed for polymers obtained by crosslinking the parent poly(aspartic acid) as well as its defunction…
Abstract Migration behaviors of antiozonants in carbon black‐filled rubber vulcanizates with different rubber compositions of natural rubber (NR), styrene–butadiene rubber (SBR), and butadiene rubber (BR) were studied at constant temperatures of 40–100°C and outdoors. Three single rubber‐based vulcanizates, three bibl…
We have studied the influence of the magnetic structure of the spacer layer on the interlayer exchange coupling and on the correlation between the coupling and magnetoresistance in MnGa-based trilayers with antiferromagnetic $({\mathrm{Mn}}_{2}\mathrm{As}),$ ferrimagnetic $({\mathrm{Mn}}_{2}\mathrm{Sb}),$ and semicond…
The effect of γ-irradiation on some physical properties of rare earth ferrite of the general formula Li 0.5 + z Co z Yb x Fe 2.5-2 z - x O 4 , ( z = 0.1, x = 0.00, 0.025, 0.050,...,0.200) was discussed. The temperature dependence of the polarization and resistance was studied in the range (300 K⩽ T ⩽700 K) at differen…