Materials Literature
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A lattice model with full rotational invariance is proposed for describing nematic liquid crystals. Orientational long-range order at low temperature is proved using the infrared bound method.
An apparatus is described which is used to measure the magnetic field vectors in electrical steel sheets in rotating magnetic fields. To avoid complicated eddy current effects we produce a rotating B-vector with constant modulus and angular velocity. Considerable variations of the modulus of the magnetic field strengt…
The applications of ferromagnetic amorphous alloys provide an excellent example of the unpredictable nature of the benefits from research and from the development of a technology. This paper traces a brief history of applications of amorphous alloys as soft magnetic materials. Specific applications are then discussed…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTVibrational spectra and analyses of the S42+, Se42+, Te42+, and trans-Te2Se22+ polyatomic cationsRobert C. Burns and Ronald J. GillespieCite this: Inorg. Chem. 1982, 21, 11, 3877–3886Publication Date (Print):November 1, 1982Publication History Published online1 May 2002Publi…
Abstract A long‐term experiment was conducted on a highly acidic (pH 4.6), coarse‐textured Ultisol (Typic Paleudult; loamy, siliceous, isohyperthermic) in the high rainfall region of southeastern Nigeria in order to evaluate the requirement for and residual value of lime [Ca(OH) 2 ] to a continuous crop rotation, and…
Abstract A comparative experimental study of the rheological properties of four cis -1,4 polyisoprenes, two naturally occurring and two synthetic, is reported. The two naturally occurring elastomers are from the hevea tree and guayule bush, and the synthetics are produced by alkyl lithium and Ziegler catalysts. Transi…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThermal reactivity of poly(styrene peroxide): a thermodynamic approachK. Kishore and K. RavindranCite this: Macromolecules 1982, 15, 6, 1638–1639Publication Date (Print):November 1, 1982Publication History Published online1 May 2002Published inissue 1 November 1982https://pu…
Abstract The concept of using optical fibers to distribute light within heterogeneous photo‐assisted catalysts is extended to photo‐electrochemical cells. The potential drop in a semiconductor photo‐electrode is predicted for various types of ohmic electrical contacts, and the optimum contact location is determined. T…
The magnetic behavior of hcp-Fe (epsilon iron) has been investigated by the Mössbauer Effect over a wide range of temperature T, pressure P, and applied magnetic field H0. The internal field Hi of the induced moment is given by Hi=0.20±0.01 H0 and is independent of T and P. Enhanced paramagnetism is suggested as the m…
Light propagation in helical structures is formulated as an eigenvalue problem based on Berreman's 4×4 matrix. Diagonalization of the secular equation is carried out to obtain the optical eigenmodes as a function of wavenumber and propagation direction relative to the helical axis, and sets of the optical eigenmodes a…
Slip bands and the corresponding dislocation structures in [111] aluminium single crystals at various strains have been simultaneously studied in detail by high-voltage electron microscopy to investigate the mean free path of mobile dislocations. The length of the slip bands is determined by the cell size at every str…
The effects of stress coaxial, transverse, and biaxial relative to applied field on magnetization, susceptibility, and domain wall configurations are derived and confirmed using rod, hollow cylinder, and hollow toroid steel samples. The effective stress σ=σ∥−σ⊥ is linearly proportional to pressure on 90° domain walls…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTReversible iron-nitrogen migration of alkyl, aryl, or vinyl groups in iron porphyrins: a possible passage between .sigma. FeIII(porphyrin)(R) and FeII(N-R)(porphyrin)complexesDaniel Mansuy, Jean Paul Battioni, Daniel Dupre, Eric Sartori, and Genevieve ChottardCite this: J. A…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis and structure of the {[(C7H8)Rh]5(cis-Nb2W4O19)2}3- anionC. J. Besecker, W. G. Klemperer, and V. W. DayCite this: J. Am. Chem. Soc. 1982, 104, 22, 6158–6159Publication Date (Print):November 1, 1982Publication History Published online1 May 2002Published inissue 1 No…
Emerald is a new broadly wavelength-tunable vibronic laser material with stimulated emission in the red to infrared due to4T_{2} \rightarrow4Atransitions of Cr3+. Emerald has gain from 12 050 cm-1to 14 000 cm-1with high gain from about 12 300 cm-1to 13 700 cm-1. An emerald laser oscillator has been achieved, but has h…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTOxygenation patterns for substituted meso-tetraphenylporphyrin complexes of iron(II). Spectroscopic detection of dioxygen complexes in the absence of aminesLechoslaw Latos-Grazynski, Ru Jen Cheng, Gerd N. La Mar, and Alan L. BalchCite this: J. Am. Chem. Soc. 1982, 104, 22, 5…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStructure of (MeC5H4)2V2S5 and its acetylene addition reactionC. Mark Bolinger, Thomas B. Rauchfuss, and Arnold L. RheingoldCite this: Organometallics 1982, 1, 11, 1551–1553Publication Date (Print):November 1, 1982Publication History Published online1 May 2002Published iniss…
Abstract The β relaxation of a phenoxy resin and a number of related uncured and cured bisphenol‐type epoxide resins was studied using a torsion pendulum. Two molecular mechanisms are proposed to contribute to the β relaxation in the range from −55 to −80°C. One is the motion of the hydroxyether group and the other is…
The initial stages of oxidation of clean, high-purity, iron foil have been studied using a Kratos ES 300 electron spectrometer with monochromatic X-radiation. Through careful observation of the Fe 2p peak profile, peak energy maximum, and peak satellite structure, it was possible to identify oxide species containing F…
Ferromagnetic resonance (FMR) has been used to study a wide variety of very thin single crystals of Fe grown on (110) GaAs substrates by molecular beam epitaxy. Data were taken at room and liquid nitrogen temperatures for films with thicknesses L in the range 18–200 Å. Due to surface anisotropy, the easy axis of the m…