Materials Literature
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The crystallographic orientation of rf reactively sputtered ZnO has been characterized by x-ray diffraction after postdeposition heat treatment. Diffractometer measurements were made on as-deposited films as well as on films which were annealed up to 700°C. The heat treatment accounted for improved crystallite orienta…
Abstract UPS studies (21.2 and 40.8 eV) are performed on BaTiO 3 (001) and SrTiO 3 (100) surfaces. In both the compounds there is an enhanced emission at the top of the valence band for hv = 21.2 eV, which cannot be explained with the existing theoretical bulk densities of states. From the results of angle‐dependent U…
Abstract The small‐angle x‐ray scattering (SAXS) pattern from a cesium salt of a 6.1 mole % ethylenemethacrylic acid (E‐MAA) copolymer is shown to become azimuthally dependent on sample elongation. SAXS was measured using the Oak Ridge National Laboratory (ORNL) spectrometer with pinhole collimation and a two‐dimensio…
Magnetic domains of barium ferrite particles less than 10 to 1 µm in size which are on surfaces of as-sintered blocks have been observed by colloid-SEM method, a modified Bitter method, with magnifications from 20000 to 45000. The number of domains in a particle decreases with reduction of particle size on average. Be…
The magnetic structure of ${\mathrm{Zn}}_{x}{\mathrm{Fe}}_{3\ensuremath{-}x}{\mathrm{O}}_{4}(0<~x<~0.8)$ has been investigated by $^{57}\mathrm{Fe}$ M\"ossbauer spectroscopy at $T=4.2$ K. A localized canting model that considers the configurational details of the neighbors has been developed for the analyses of…
We have observed a new nonlinear light amplification process in a nematic liquid crystal, p-methoxybenzylidene-p-n-butylaniline, maintained above the Frederiks transition by a magnetic field. Substantial probe-beam gain (10% or more) was observed for a moderate same-frequency pump beam of intensity on the order of W/c…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTIron pentacarbonyl decomposition over Grafoil. Production of small metallic iron particlesJ. Phillips, B. Clausen, and J. A. DumesicCite this: J. Phys. Chem. 1980, 84, 14, 1814–1822Publication Date (Print):July 1, 1980Publication History Published online1 May 2002Published i…
The structure of the proteolytic enzyme, actinidin, has been refined by fast Fourier least-squares methods [Agarwal (1978), Acta Cryst. A34, 791-809]. Atomic positions were refined independently by the least-squares program, with the whole protein structure being regularized at intervals. After an initial refinement p…
Electrical conductivity and relaxation data were measured for glasses of composition 0.242[ X K 2 O+(1‐ X )Na 2 O]‐0.758SiO 2 from 25° to 205°C and in the dilute Na + ion composition range X = 0.9 to 1. The decrease in electrical conductivity σ when the majority alkali K + is replaced with the foreign alkali Na + is m…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStructure of bis(phthalocyaninato)neodymium(III)K. Kasuga, M. Tsutsui, R. C. Petterson, K. Tatsumi, N. Van Opdenbosch, G. Pepe, and E. F. Meyer Jr.Cite this: J. Am. Chem. Soc. 1980, 102, 14, 4835–4836Publication Date (Print):July 1, 1980Publication History Published online1…
Based on an exact solution of the pertinent boundary-value problem, a method is presented for finding the electromagnetic fields scattered or guided by lossy dielectric gratings having arbitrary profiles. This method unifies the treatment of both perpendicular (TE) and parallel (TM) polarizations by expressing the fie…
The dielectric properties of a classical system of interacting particles, each bearing a permanent dipole moment and thermally fluctuating polarizability, is considered. It is shown how a useful class of approximations initially defined for a system of nonpolarizable particles can be generalized to include fluctuating…
Ceramics exhibit macroscopic stress/strain rate relations that should lead to superplastic extension. However, premature fracture is normally encountered, due to the formation and growth of grain‐boundary cavities. Thus, cavity nucleation and growth were analyzed in an attempt to identify microstructures and/or strain…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTElastic Properties of Well-Characterized Ethylene-Propylene Copolymer NetworksDale Pearson and William GraessleyCite this: Macromolecules 1980, 13, 4, 1001–1009Publication Date (Print):July 1, 1980Publication History Published online1 May 2002Published inissue 1 July 1980htt…
General formulas of the angular distribution and spin polarization of photoelectrons are derived for arbitrarily polarized incident photons including all multipole effects of the photon fields. Dynamical parameters are given in terms of reduced matrix elements suitable for a general multichannel theory in both the rel…
Graphite–halogen (Br2, ICl) residue compounds have been found to be convenient temperature calibration standards for transmission electron microscopy in the medium temperature range. Due to the order–disorder transformation associated with the intralayer intercalate ordering in these intercalation compounds, the obser…
Theoretical and experimental aspects of the Yttrium oxide, Y2O3, plasticity are studied. Stacking fault energy computations are performed on the basis of an ionic crystal model. The results clearly establish the possibility of a stacking fault having a very low energy. Consequences on the fine structure of the disloca…
Determination of corrosion rate for carbon steel in stagnant NaCl solutions was attempted by the linear polarization method, but none of the polarization data obtained by conventional procedures (potentiostatic or potentiodynamic) gave satisfactory results. It was shown that the value of calculated corrosion rate is a…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTProduction Diglycolic Acid by Nitric Acid Oxidation of Diethylene GlycolChung Y. Shen and Dennis A. RuestCite this: Ind. Eng. Chem. Process Des. Dev. 1980, 19, 3, 401–404Publication Date (Print):July 1, 1980Publication History Published online1 May 2002Published inissue 1 Ju…
Variations of the electronic work function of carburized rhenium foils containing approximately 5 at.% carbon have been observed using the contact potential difference technique. Surface work function was observed to vary between 5.25 and 4.1 eV, with the work function of pure rhenium taken as 5.0 eV. Decrease in work…