Materials Literature
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The magnetic susceptibility of a powder sample of $\ensuremath{\alpha}\mathrm{MnS}$ was measured from 90\ifmmode^\circ\else\textdegree\fi{}K to 800\ifmmode^\circ\else\textdegree\fi{}K by an absolute Gouy method. The N\'eel temperature was found to be 154\ifmmode^\circ\else\textdegree\fi{}K. There was no evidence of th…
Previously published data on Auger ejection from tungsten include the effect of a two percent admixture of metastable ions in the ion beam for A, Kr, and Xe. Data on yield and kinetic energy distribution of electrons ejected by the normal singly-charged ion only are presented in this paper.
The presence in a semiconductor of both signs of current carriers makes it possible to disturb the spatial distribution of these carriers appreciably without giving rise to electrical space charge. As a result, the interaction of particles with acoustic waves leads to certain effects which, at least at low frequencies…
Neutron diffraction patterns have been obtained for polycrystalline Mn${\mathrm{Fe}}_{2}$${\mathrm{O}}_{4}$ at 300\ifmmode^\circ\else\textdegree\fi{}K and 4.2\ifmmode^\circ\else\textdegree\fi{}K. The fraction of tetrahedral sites occupied by ${\mathrm{Mn}}^{+2}$ has been found to be 0.81\ifmmode\pm\else\textpm\fi{}0.0…
Abstract The rate of oxidation of thin films of polybutadiene have been studied between 50 and 90°C. The films were prepared directly from latex by dipping, and thoroughly purified. The oxidation rates were found to go through an induction period, to accelerate rapidly to a maximum, and then to decrease to low values.…
All but one of the multiple ferromagnetic resonances observed by White and Solt in a sphere are shown to correspond to modes in which the oscillating part of the magnetization is independent of $r$ (the only case ordinarily considered) or varies linearly with $r$ in the sample.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe Formation of Pyridoxal and Pyridoxal 5-Phosphate Hydrazones1Ronald G. WiegandCite this: J. Am. Chem. Soc. 1956, 78, 20, 5307–5309Publication Date (Print):October 1, 1956Publication History Published online1 May 2002Published inissue 1 October 1956https://pubs.acs.org/doi…
For the normal heavy-atom method of solving crystal structures the Fourier series, whose coefficients are given in moduli by the observed intensities and in phase by the heavy-atom contribution, is summed. It is shown that a Fourier series with coefficients quite different from these shows the unknown part of the stru…
Ferromagnetic resonance in ferrites is reviewed. The concept of tensor permeability, the influence of magnetic anisotropy, demagnetizing fields, and damping mechanisms are discussed. Special consideration is given to coupled magnetic systems and the behavior in ferrites with compensation points. The general theoretica…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe Quantitative Evaluation of the Effect of Hydrogen Bonding on the Strength of Dibasic AcidsF. H. Westheimer and O. T. BenfeyCite this: J. Am. Chem. Soc. 1956, 78, 20, 5309–5311Publication Date (Print):October 1, 1956Publication History Published online1 May 2002Published…
Abstract The adsorption of zinc chloride on calcite, dolomite and Casubstituted magnesite crystals from aqueous solution is treated theoretically; and a standard adsorption process is thereby rigorously defined. The thermodynamic characteristics Δ F 0 θ, Δ H 0 θ and Δ S 0 θ are determined for this process by means of…
A theory is developed of the continuous radiation spectrum which accompanies nuclear capture of atomic electrons. It is shown that quantitative predictions of the spectrum intensities must take into account the influence of the electrostatic field of the nucleus on the radiation process. This is accomplished by evalua…
A review of the properties, applications, and engineering significance of ferrites below microwave frequencies is presented. The survey includes a discussion of the nature of ferrites, their magnetic and electrical properties, the use of the μQ product as a design index of efficiency, core losses, and the effects of a…
Abstract The reaction of cellulose, cellobiose, and their acetyl derivatives with trifluoroacetic acid has been studied by the method of infrared spectrophotometry. Changes in optical density were measured at 25°C. as a function of time. Band assignments are adequate for the present study, although some uncertainties…
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHeats of Formation of Sodium Molybdate, Molybdic Acid and Aqueous Molybdate IonRobert L. Graham and Loren G. HeplerCite this: J. Am. Chem. Soc. 1956, 78, 19, 4846–4848Publication Date (Print):October 1, 1956Publication History Published online1 May 2002Published inissue 1 Oc…
The activation energy of creep was determined for a series of tin single crystals oriented with the specimen axis close to a [110] direction. Two activation energies were found. A value of approximately 22 000 cal/m was obtained for temperatures above 130°C; a value of about 11 000 cal/mole for temperatures below 130°…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThermal Dissociation Pressure of Calcium CarbonateK. J. Hill and E. R. S. WinterCite this: J. Phys. Chem. 1956, 60, 10, 1361–1362Publication Date (Print):October 1, 1956Publication History Published online1 May 2002Published inissue 1 October 1956https://pubs.acs.org/doi/10.…
Boron nitride can be excited to luminesce by (1) alternating electric fields, (2) ultraviolet photons, or (3) cathode rays. The luminescence, in all cases, has a complex emission spectrum, extending from approximately 2950 A to 6500 A. The relative intensities of the bands in the fine structure are affected by current…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTKinetics and Mechanism of the Hydroformylation Reaction. The Effect of Olefin Structure on Rate1Irving Wender, Sol Metlin, Sabri Ergun, Heinz W. Sternberg, and Harold GreenfieldCite this: J. Am. Chem. Soc. 1956, 78, 20, 5401–5405Publication Date (Print):October 1, 1956Public…