Materials Literature
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Magnetization reversal at an angle to the easy direction has been studied on Permalloy films with different values of coercive force Hc and anisotropy field HK. The hysteresis properties show that ``inverted'' films (Hc>HK) do not represent a special case, but that every film exhibits inversion in a certain sec…
Abstract Die Kristallstruktur des SrZnO 2 wurde mit Hilfe 3‐dimensionaler P ATTERSON ‐ und F OURIER ‐Synthesen aufgeklärt. SrZnO 2 kristallisiert orthorhombisch in der Raumgruppe D 16 2h ‐Pmnb. Die Elementarzelle mit a = 3,35, b = 5,84, c = 11,37 Å enthält 4 Formeleinheiten (d Rö = 5,52; d pyk = 5,49 g · cm −3 ). Im B…
Copper (99.999%) crystals with a dislocation density of 50/mm2 have been prepared. These crystals were stressed by applying a pure bending moment, and they were etched with a dislocation etch either before and after or while the stress was applied. The motion of dislocations was determined by observing the size and na…
The Zeeman effect of the nuclear quadrupole resonance spectrum for spin I=32 in crystalline powder has been studied. Theoretical considerations have predicted that, in a nonaxial electric field gradient, the absorption line should be broadened with a characteristic envelope by a weak static magnetic field. When a radi…
Abstract Mechanical relaxation was studied in bulk polyoxymethylene by means of a torsion pendulum. The magnitude of the large γ peak at 203°K. (for f = 1.1 cycles/sec.) decreases with increasing density. The magnitudes of the β peak at 260°K, and the α peak at 400°K. do not depend on density. The β peak is small unle…
Electrical conductivity and thermoelectric power measurements have been made on nonstoichiometric UO2 at temperatures of 500–1150°C. The conductivity data in the single phase UO2+x region can be represented by the equation σ(ohm cm)−1=(3.8×106)/T(2x)(1−2x) exp[(−0.30±0.03 ev)/kT].An approximate equation for the thermo…
The wear resistance of single crystals of sapphire was determined as a function of crystallographic orientation with respect to plane of wear and rubbing direction. Distinct anisotropy was found. Evidence of plastic flow at the wear surface on both basal and prismatic slip systems was obtained. In bulk deformation tes…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTProperties and Structure of Polymers.Turner Alfrey Jr.Cite this: J. Am. Chem. Soc. 1961, 83, 19, 4111Publication Date (Print):October 1, 1961Publication History Published online1 May 2002Published inissue 1 October 1961https://pubs.acs.org/doi/10.1021/ja01480a051https://doi.…
Measurements have been made in the temperature range 750° to 1050°C. of the temperature dependence of the electromotive force of the solid‐electrolyte galvanic cells image and from these data the variation with temperature of the relative partial molar free energy of oxygen on the right side of the foregoing cells was…
Estimates of the extent of the hydrogen exchange reaction between cellulose and water vapor determined by an improved method using tritiated water and by the use of heavy water were usually in good agreement. With certain samples, surface roughness had a small effect upon the measurement of tritium radioactivity in ce…
The hydroid Sertularia operculata is abundant on boulders where the current is strong in the Lough Ine Rapids, especially on the Sill. It decreases in abundance towards positions sheltered from the current (Lilley et al. 1953), and has not been found in Codium Bay which lies just inside the lough. Codium Bay is fully…
The AlKα emission wave length is determined by the state of coordination of Al atoms and a clear distinction can be made between Al atoms in fourfold and in sixfold coordination to oxygen and also between Al atoms in fourfold coordination to oxygen and to nitrogen. Measurements of Δ(2θ) (the difference in diffraction…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCOLLOIDAL ALUMINA—THE CHEMISTRY AND MORPHOLOGY OF COLLOIDAL BOEHMITEJohn BugoshCite this: J. Phys. Chem. 1961, 65, 10, 1789–1793Publication Date (Print):October 1, 1961Publication History Published online1 May 2002Published inissue 1 October 1961https://pubs.acs.org/doi/10.1…
The absorptions of natural MgAl 2 O 4 spinels which have been heated to various temperatures suggest that a structural change takes place between 800° and 900°. A decrease in the lattice constant of 0.004 Å occurs at the same temperature. Comparisons between the absorptions of LiAl 5 O 8 with ordered and disordered Li…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMagnetic Studies of High-spin Cobaltous Compounds. VII. Some Thiocyanate ComplexesF. A. Cotton, D. M. L. Goodgame, M. Goodgame, and A. SaccoCite this: J. Am. Chem. Soc. 1961, 83, 20, 4157–4161Publication Date (Print):October 1, 1961Publication History Published online1 May 2…
Experiments have been carried out on the photolysis of methyl azide and methyl-d3 azide at high dilution in solid argon (4.2°K) and carbon dioxide (∼50°K). Photolysis of these species in argon and carbon dioxide matrices results in the appearance of a number of new spectral features in the 3300–600 cm—1 region. The sp…
The structure of 4-nitroaniline has been refined three-dimensionally with visually-estimated Cu Ka data. Positional and thermal parameters for the carbon, nitrogen, and oxygen atoms, and positional parameters for the hydrogen atoms, were obtained by least squares. The standard errors in bond lengths not involving hydr…
It was found that there exists a new ferromagnetic phase in Cu poor Mn–Al–Cu alloy in the composition range of 25 to 45 at % Mn, 37.5 to 50 at % Al and 12.5 to 25 at % Cu. The crystal structure is CsCl type and the lattice parameter is 2.984Å. This structure is the same as the κ phase in Mn–Al–Fe system. The magnetic…
Examines the crystalline structure of the diamond and the chemical and industrial processes involved in its synthesis.
Abstract Some silica modification such as carplex and ground quartz particle, gives rise to the bands near 950 cm−1. This band has no relation with the skeletal structure of Si–O bond and can not be explained as overtone or combination tone. It is reasonable to assign this band to O–H deformation vibration of silanol…