Materials Literature
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The problem of a nematic liquid crystal in an electric field is solved. Effects due to conductivity of the liquid have been neglected. Numerical solutions are given for various values of parameters. The solution is compared with experimental data taken from the literature. A computer program has been developed to do a…
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PRINCIPAL CAUSES OF CRACKING AND RECOMMENDED CRACK CONTROL PROVISIONS ARE PRESENTED IN THIS REPORT. IT COVERS THE BASIC MECHANISM OF MICROCRACKING AND FRACTURE MECHANICS IN CONCRETE. IT DEALS WITH CONTROL OF CRACKING DUE TO VARIOUS CAUSES IN THE FOLLOWING AREAS: SHRINKAGE, REINFORCED CONCRETE BEAMS, ONE-WAY AND TWO-WA…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMagnetic exchange in transition metal complexes. IX. Dimeric nickel(II)-ethylenediamine complexesA. P. Ginsberg, R. L. Martin, R. W. Brookes, and R. C. SherwoodCite this: Inorg. Chem. 1972, 11, 12, 2884–2889Publication Date (Print):December 1, 1972Publication History Publish…
The uniaxial deformation of an elastic-plastic medium containing a doubly periodic square array of circular cylindrical voids is studied under plane-strain conditions. Both the effects of geometrical nonlinearities resulting from large deformation and physical nonlinearities arising from plastic material behavior are…
The refractive indices of the ternaryA^{I}B^{III}C_{2}^{VI}semiconductors CuAlSe2, AgGaSe2, CuGaSe2, and AgInSe2have been measured over most of the transparency range of these crystals. The optical nonlinear coefficients for second-harmonic generation of AgGaSe2CuGaSe2, and AgInSe2have also been measured. Three-freque…
A unified hydrodynamic theory is presented that is appropriate for crystals; smectic, cholesteric, and nematic liquid crystals; glasses; and normal fluids. In the theory, the increased spatial degeneracy as the system progresses from crystalline and mesomorphic phases to the isotropic fluid phase is marked by successi…
The present review considers experimental data and the results of theoretical studies of the dehydration of crystal hydrates. The data have been systematised according to the stages of the reaction in the light of modern theories of the kinetics and mechanism of chemical reactions in solids. Attention has been drawn t…
Published information on the chemistry of oxygen compounds of iron — the ferrates(VI, V, IV) — has been reviewed briefly. The methods of preparation, chemical properties, thermal decomposition in air and in O2, the kinetics and mechanism of decomposition in solution, methods of analysis, structural, spectroscopic, and…
The adiabatic elastic constants of single crystals of neon at 24.3 K and of argon at 82.0 K have been determined by Brillouin scattering. For argon the values are ${C}_{11}=2.33\ifmmode\pm\else\textpm\fi{}0.08$, ${C}_{12}=1.49\ifmmode\pm\else\textpm\fi{}0.06$, ${C}_{44}=1.17\ifmmode\pm\else\textpm\fi{}0.07$, in units…
The magnetic structures of metallic samarium have been determined from neutron-diffraction data on a single crystal of $^{154}\mathrm{Sm}$. Anomalies in a number of physical properties of this metal at 106 and 13.8\ifmmode^\circ\else\textdegree\fi{}K are associated with ordering of the moments on the hexagonal and cub…
We report observation of bound-polaron hopping in pure NiO single crystals. The observed activation energy is $\ensuremath{\approx}0.7$ eV, the bandwidth $J\ensuremath{\approx}{10}^{\ensuremath{-}2}$ eV, and the binding center is suggested to be the ${\mathrm{Ni}}^{+2}$ vacancy.
The monoxides of the rare earth metals are currently receiving attention because of the possibility of their being ‘n’ or ‘p’ type semiconductors [6]. Unlike the R2O3 type sesquioxides whose structures and existence have been well established, very little details regarding the existence, structure, and defect substruc…