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The Permalloy Problem
In attempting to explain the unusual magnetic properties of the iron-nickel alloys, single crystals of alloys containing 35 to 100 percent nickel were prepared, and measurements made of the magnetic crystal anisotropy and magnetostriction as dependent on cooling rate. It is confirmed that there is a large effect of co…
Hall Effect in Ferromagnetic Materials
Experimental results are reviewed for Fe, Co, Ni, the Co-Ni and Ni-Cu alloy series. Most of the measurements were made at room temperature. In the case of Ni, data are available from about 10\ifmmode^\circ\else\textdegree\fi{}K to 800\ifmmode^\circ\else\textdegree\fi{}K.In every case studied, the Hall emf consists of…
Neutron Diffraction Studies of Zinc Ferrite and Nickel Ferrite
The chemical and magnetic structures of zinc ferrite and nickel ferrite have been investigated at room temperature by means of neutron diffraction. In agreement with previous x-ray investigations zinc ferrite has been found to possess a completely regular spinel structure with an oxygen parameter of 0.385\ifmmode\pm\e…
A new method of concentrating and cleaning diatoms and other organisms
"A new method of concentrating and cleaning diatoms and other organisms." Internationale Vereinigung für theoretische und angewandte Limnologie: Verhandlungen, 12(1), pp. 276–277
Concrete for Radiation Shielding
First Name is required invalid characters Last Name is required invalid characters Email Address is required Invalid Email Address Please select a country... Afghanistan Åland Islands Albania Algeria American Samoa Andorra Angola Anguilla Antarctica Antigua And Barbuda Argentina Armenia Aruba Australia Austria Azerbai…
Oxidation of Metals at High Temperatures
The available data on the oxidation rates of pure metals from 300° to 1000°C have been analyzed in terms of concentrations of defects in the oxide structures and defect diffusion coefficients. Quantitative agreement with the diffusion theory is obtained in the cases of p ‐type oxides such as cuprous oxide and nickel o…
Physical properties and atomic arrangements in crystals
A survey is given of the relation between four physical properties of crystals and their structural characters. The properties discussed are the magnetic, optical, piezoelectric and elastic. The well-established relations between ( a ) diamagnetic anisotropy and molecular orientation and ( b ) paramagnetic anisotropy…
A PRISMATIC SUBSTRUCTURE FORMED DURING SOLIDIFICATION OF METALS
Single crystals of tin grown from the melt under a wide range of conditions are shown to exhibit a fibrous structure which manifests itself as parallel ridges ("corrugations") on the free surface of the specimen and as a hexagonal network ("hexagonal cells") on the growing solid–liquid interface. The center of each ce…
Paramagnetic resonance
After a brief introduction a general account is given of the main phenomena associated with electronic magnetic resonance. Two chapters on line width and experimental technique review the problems involved in detection of the resonance phenomena. A short account of the theory of paramagnetism of the solid state follow…
Sodium Borohydride, Its Hydrolysis and its Use as a Reducing Agent and in the Generation of Hydrogen1
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSodium Borohydride, Its Hydrolysis and its Use as a Reducing Agent and in the Generation of Hydrogen1H. I. Schlesinger, Herbert C. Brown, A. E. Finholt, James R. Gilbreath, Henry R. Hoekstra, and Earl K. HydeCite this: J. Am. Chem. Soc. 1953, 75, 1, 215–219Publication Date (…
Structural Features of Oxide Coatings on Aluminum
The structural features of the porous type of anodic oxide coating applied to aluminum have been investigated with the electron microscope. These coatings consist of close‐packed cells of oxide, predominately hexagonal in shape, each of which contains a single pore. Pore size is a function of the electrolyte used and…
On Conditions for the Vernal Blooming of Phytoplankton
H. U. Sverdrup; On Conditions for the Vernal Blooming of Phytoplankton, ICES Journal of Marine Science, Volume 18, Issue 3, 1 January 1953, Pages 287–295, https
Thermionic constants of metals and semiconductors II. Metals of the first transition group
Abstract The method described in part I for the determination of the thermionic constants of graphite, which is based on finding the saturation vapour pressure of the electron gas in a graphite chamber at different known temperatures, and applying the well-known thermodynamic relation of Clausius and Clapeyron, can be…
The theory of the magnetic properties of rare earth salts: cerium ethyl sulphate
Abstract The theory of a Ce3+ ion in a crystal is considered as that of a free ion with a single 4f electron outside closed shells, and the effect of the surrounding lattice is included as a static crystalline electric field. The problem is solved when this field has C3k symmetry. It is possible that this theory will…
The anomalous skin effect
Abstract The anomalous skin effect arises in good conductors at low temperatures and high frequencies when the electronic mean free path becomes comparable with or greater than the classically calculated skin depth. Measurements have been made on a number of metals at frequencies of 1200 and 3600 Mc/s, and the form of…
The Stopping Power ofK-Electrons
The stopping power of $K$-shell electrons for large incident particle energies is calculated in this paper, adding to and correcting previous work on the subject. A definition is given for the average ionization potential of an atom independent of the energy of the incident particle. An integral representation is deri…
The semiconducting properties of cuprous oxide
Abstract A procedure has been developed for preparing reproducible specimens of cuprous oxide at the oxygen-poor limit of its composition range. The electrical conductivity and thermoelectric power of such specimens were measured simultaneously, and related to temperature within the range 20 to 1030° C. The conductivi…
Interaction of electrons with lattice vibrations
Abstract Using methods of modern field theories a canonical transformation of the Hamiltonian of free electrons in the field of the lattice vibrations is performed. This transformation takes account of the bulk of the interaction of the electrons with the vibrational field and leads to a renormalization of the velocit…
The Mechanism of the Ring Discharge in Negative Point-to-Plane Corona
Conditions favoring the formation of the ring discharge, and changes in the electrical characteristics which it brings about, are discussed. A theory is developed which seeks to explain the formation of the ring in terms of field distortion caused by negative space charges in the gap. This requires a change of view on…