Materials Literature
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Stacking-fault tetrahedra have been observed in plastically deformed specimens of copper, silver, gold and several alloys. A dislocation reaction is proposed for the formation of these defects during deformation. From the size of the largest tetrahedra, estimates of stacking-fault energy are made which indicate that t…
Abstract The scheme and treatment of the kinetics of scorch-delay vulcanization proposed in a previous paper were applied to natural rubber sulfur vulcanization accelerated by 2,2′-thiobisbenzothiazole (MBTS), 2-(N-cyclohexyl)benzothizaolesulfenamide (CBS), 2-(N-morpholinothio)benzothiazole (MOR), or 2-(N,N-diisopropy…
Pratt and Bailey have recently explained the optical and anomalous magnetic properties of Cr2O3 by means of a model consisting of the basic Cr2O3 antiferromagnetic structure with moments canted away from the c axis and forming some kind of spiral. Our neutron powder-diffraction data confirm the original Brockhouse mom…
It is argued that there is a critical cation-anion covalent mixing parameter λc such that ligand-field theory is appropriate for λ<λc, but band theory must be used for λ>λc. This provides, therefore, a criterion for distinguishing metallic vs magnetic compounds in those structures, like perovskite, where…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe Crystal Structure of Barium Ruthenium Oxide and Related CompoundsPaul C. Donohue, Lewis Katz, and Roland WardCite this: Inorg. Chem. 1965, 4, 3, 306–310Publication Date (Print):March 1, 1965Publication History Published online1 May 2002Published inissue 1 March 1965https…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTA Scheme for Strain Energy Minimization. Application to the Cycloalkanes1Kenneth B. WibergCite this: J. Am. Chem. Soc. 1965, 87, 5, 1070–1078Publication Date (Print):March 1, 1965Publication History Published online1 May 2002Published inissue 1 March 1965https://pubs.acs.org…
A gas-filled bubble in a liquid will generally dissolve because of diffusion of gas out of the bubble into the surrounding liquid. However, when set into motion by an acoustic field, a bubble may grow by a process called rectified diffusion. This process can counteract the effect of diffusion for values of the acousti…
Fluorescence yields and lifetimes of solutions of europium and terbium salts in solution are greatly enhanced by using deuterated solvents. The magnitude of increase varies from an 18-fold enhancement in yield and lifetime for an aqueous solution of europium nitrate to a twofold enhancement for europium ethylenediamin…
A review of neutron diffraction studies of the magnetic properties of rare-earth metals and alloys is presented. For each of the pure metals Tb, Dy, Ho, Er, and Tm there is observed a transition at a temperature TN to an oscillatory antiferromagnetic configuration (helical or linear oscillator type). At lower temperat…
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Received 21 January 1965DOI:https://doi.org/10.1103/PhysRevLett.14.305©1965 American Physical Society
Hall-effect and electrical-conductivity measurements have been made on reduced single crystals of the perovskite potassium tantalate (KTa${\mathrm{O}}_{3}$) over the temperature range 1.6-295\ifmmode^\circ\else\textdegree\fi{}K. Lattice scattering predominates above 100\ifmmode^\circ\else\textdegree\fi{}K where the Ha…
The Curie point, lattice constants, sublattice magnetization, spontaneous magnetic moment, susceptibility, and the nonlinear susceptibility have been measured on the compounds RFeO3 with R yttrium or a rare earth. The main conclusions from these measurements are: (1) The rare-earth ions contribution to the magnetic pr…