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A fundamental law previously found in YIG, which relates the hysteresis losses to the magnetization state is generalized to Ni ferrite and to mixed NiZn and NiCd ferrites. The interpretation which is given is based on the domain wall size theory previously proposed by Globus : the energy lost by the continuous pinning…
Helium permeation, diffusion, and solubility have been measured for a number of lithium silicate and aluminosilicate glasses. Helium mobility in the lithium silicate glasses is controlled by the two-phase morphology of these glasses. Addition of as little as 2 mol% alumina strongly suppresses the tendency toward phase…
A 20%Cr-25%Ni-Nb steel subjected to mechanical working and precipitation strengthening was creep-tested at a temperature of 1073 K in the stress range 25–180 MPa. Coarse and fine NbCN precipitate distributions were investigated. At stresses less than that to bow dislocations between precipitates each alloy exhibited a…
R Srinivasan and S Parthasarathy Oxford: Pergamon 1976 pp xix + 248 price £11.25 Methods of crystal structure analysis continue to undergo refinement, obviously with the introduction of computer controlled multicircle single crystal diffractometers, but, in a more subtle way, by the application of probability theory t…
The spin-orientation diagram of ${\mathrm{Tb}}_{1\ensuremath{-}x}{\mathrm{Dy}}_{x}{\mathrm{Fe}}_{2}$ is constructed by $^{57}\mathrm{Fe}$ M\"ossbauer measurements and compared with single-ion calculations. The $4f$-crystal-field interaction dominates the magnetocrystalline anisotropy properties, though the presence of…
Exploratory studies of three polyelectrolytes containing several types of ionic species in different molecular environments were performed by dynamic mechanical, dielectric, and calorimetric methods. The materials were dimethyldiallyl-ammonium chloride (DMDAAC), 3-acrylamido-3-methylbutyl trimethylammonium chloride (A…
The room temperature modification of Ag 8 SiS 6 is orthorhombic, space group Pna2 1 , with α = 15.024, b = 7.428, c = 10.533 Å, Z = 4. A complete single crystal X-ray structure analysis shows the structure to contain tetrahedral SiS 4 (4-) units (Si-S 2.094(12) ... 2.130(12) Å) besides isolated sulfide groups coordina…
The composition range of tetrahedrite in the Cu-Sb-S system has been redetermined in detail at 300 degrees C, 355 degrees C, 400 degrees C, 500 degrees C, and 540 degrees C. The results at 500 degrees C and 540 degrees C are essentially similar to those of Skinner et al. (1972).Within the temperature range between 300…
The specific heat of single crystals of europium gallium garnet (EuGaG) and dysprosium gallium garnet (DyGaG) and of a sintered polycrystalline sample of praseodymium gallium garnet (PrGaG) has been measured between 0.4 and 90\ifmmode^\circ\else\textdegree\fi{}K. For EuGaG the results can be described by the lattice c…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTElectron spin resonance investigation of the soluble blue copper(II) hydroxide complexYen-Yau H. Chao and David R. KearnsCite this: J. Phys. Chem. 1977, 81, 7, 666–668Publication Date (Print):April 1, 1977Publication History Published online1 May 2002Published inissue 1 Apri…
Abstract Inhalt: Einführung — Grenzflächenenergie von Flüssigkeitstropfen — Randwinkel und Benetzung — Oberflächenrauhigkeit und Randwinkelhysterese — Experimentelle Benetzungsprüfung — Theoretische Ansätze (Wechselwirkungsparameter; polare und unpolare Wechselwirkungen an Phasengrenzen) — Benetzungsvorgänge in der Te…
The specific energy absorbed during uniaxial tension and during axial compression of cylindrical tubes with various wall thicknesses and diameters has been measured for 1015 steel in two heat treatment conditions and for 6061 aluminum alloy in four heat treatment conditions. For axial compression of tubes, the energy…
Abstract— A kinetic investigation was performed on the photooxidation of methionine sensitized by various porphyrins at different oxygen concentrations. The rate of photooxidation was found to be strongly dependent on the nature of the sensitizer. In the case of hematoporphyrin, chelation of Mg 2+ and Zn 2+ and especi…
The idea of public geographies, inspired by Burawoy's call for public sociologies, places an emphasis on the co-construction of research data, accessible writing and the use of non-traditional media. As yet, however, the methodological implications of public geographies have not been explored. Hence this project seeks…
Monoclinic TaSe 3 was found to be superconducting below 2.1 K. The effect of magnetic field on the transition curve is very anisotropic. One-dimensional behavior is expected.
Measurements of the secondary electron yields delta and delta T on the incident and the opposite surfaces respectively of transparent Al and Au films are reported for the normal incidence of 10-100 keV electrons, using an apparatus with accurate separation of secondary, backscattered and transmitted electrons. Results…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMetal clusters in catalysis. 10. A new Fischer-Tropsch synthesisG. C. Demitras and E. L. MuettertiesCite this: J. Am. Chem. Soc. 1977, 99, 8, 2796–2797Publication Date (Print):April 1, 1977Publication History Published online1 May 2002Published inissue 1 April 1977https://pu…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe spectrochemical properties of tetragonal complexes of high spin nickel(II) containing macrocyclic ligandsLudmila Y. Martin, C. Robert Sperati, and Daryle H. BuschCite this: J. Am. Chem. Soc. 1977, 99, 9, 2968–2981Publication Date (Print):April 1, 1977Publication History…
The surfaces of the normal paraffins (C3–C8) and cyclohexane have been studied using low-energy electron diffraction (LEED). The samples were prepared by vapor deposition on the (111) face of a platinum single crystal in ultrahigh vacuum, and were studied both as thick films and as adsorbed monolayers. These molecules…
Simplified equations are presented for the elastic properties of randomly oriented short fiber-glass composites. The suggested equations for the Young's modulus, the shear modulus and the Poisson ratio are given in terms of the fiber-glass content and the Young's moduli of the constit uents. The equations are applicab…