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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSubstituted deuteroporphyrins. V. Structures, stabilities, and properties of nickel(II) complexes with axial ligandsByron D. McLees and Winslow S. CaugheyCite this: Biochemistry 1968, 7, 2, 642–652Publication Date (Print):February 1, 1968Publication History Published online1…
The surface energies of face·centred and body. centred cubic crystals have been calculated on the assumption that the atoms interact with pairwise potentials of either Morse or Mie type. The calculations take into account interactions between all neighbours and have been carried through for about 50 crystallographical…
A neutron-scattering experiment to look for spin-wave excitation-energy changes of magnetite at the transition point 119°K showed no such change. During this work we discovered, however, that the low-temperature structure gives rise to weak extra neutron-diffraction lines that can be indexed as (h, k, l±½) in cubic in…
CuCr 1+x Rh 1−x Se 4 with −1 < x ≦ 1 and CuCr1+xTi1−xS4 with 0 < x ≦ 1 show p-type metallic conduction and are ferromagnetic, while CuCr1+xTi1−xS4 with x<0 show n-type metallic conduction and no magnetic ordering at 4°K. From the magnetic and electrical properties, which indicate that Cu is monova…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTApproach to the separation of inductive and mesomeric effects in complexes of the types LMn(CO)5 and LMo(CO)5William A. G. GrahamCite this: Inorg. Chem. 1968, 7, 2, 315–321Publication Date (Print):February 1, 1968Publication History Published online1 May 2002Published inissu…
Abstract A natural rubber vulcanizate containing almost entirely monosulfidic crosslinks was oxidized in oxygen and with tert ‐butyl hydroperoxide. The changes in physical properties due to oxidation were followed by stress–strain measurements, and the changes in chemical structure were investigated with chemical prob…
Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Twitter Facebook Reddit LinkedIn Tools Icon Tools Reprints and Permissions Cite Icon Cite Search Site Citation Richard Gordon; Adsorption Isotherms of Lattice Gases by Computer Simulation. J. Chem. Phys. 1 Fe…
The magnetostatic properties of the rare earth chromites, RCrO3, and those of the rare earth manganites, RMnO3, have been studied between 1.6° and 1500°K, in fields up to 28 000 Oe. These compounds are antiferromagnetic; they present two Néel points. For the rare earth chromites, the first Néel point varies between 11…
AN INVESTIGATION ON THE BASIC ASPHALTS OF THERMAL EXPANSION AND CONTRACTION OF ASPHALTIC CONCRETE WAS CONDUCTED. ASPHALTIC CONCRETE EXHIBITS TWO DIFFERENT THERMAL COEFFICIENTS OF EXPANSION AND CONTRACTION SIMILAR TO ASPHALT CEMENT IN THE TEMPERATURE RANGE MINUS 10 TO 140 F. THESE HAVE BEEN CALLED THE SOLID AND FLUID T…
The magnetostriction of iron single crystals has been measured as a function of temperature (77°K to 900°K), magnetic field (up to 14 kOe), and magnetic field orientation. These data have been used to evaluate the magnetostriction constants for two- and five-constant expressions. The high-temperature maximum in λ100 a…
We report the experimental observation, with pulsed field, of the anisotropy in magnetization theoretically predicted for single crystals of TmSb. Agreement with crystal-field-only theory is excellent at 1.5°K. At 20.4°K, agreement between isothermal theory and experiment is poorer. This discrepancy can be explained i…
Using the phase transformation at 68°C found in materials based on vanadium dioxide, devices exhibiting an S-type current-voltage characteristic have been produced. The characteristic has an unstable differential negative-resistance region which leads to fast switching (20 ns). Devices have been made by the fusion of…
An electron microscopic investigation is described of the effect of high temperature annealing on deformed copper single crystals containing dispersed second phases of either cobalt or silica. Sections of selected orientation cut from the deformed crystals were annealed at 700°C. It was found that specimens deformed i…
We discuss the value of the intrinsic magnetic moment of cobalt in intermetallic compounds of the formula RxCov, where R is a rare earth element or yttrium. The experimental values of this moment are determined from the results of neutron-diffraction studies and those of measurements of the absolute saturation magneti…
The magnetic susceptibility χ of UO2 diluted by its diamagnetic isomorph, ThO2, is reported for 1.7° ≤ T ≤ 60°K. In dilute samples, 5%–10% UO2 in ThO2, χ−1 decreases monotonically with decreasing temperature. Blume's singlet ground-state mechanism for the first-order magnetic phase transition in UO2 requires a Γ1 sing…
Spinels CoCr2O4 and MnCr2O4 display a magnetic structure in which moments on octahedral sites split into two groups. In one of these, transverse components are antiparallel and have the fcc symmetry of the chemical cell. The transverse components of the other group together with those of the tetrahedral sites build a…
Cobalt manganite CoMn2O4 is prepared at 1250°C and quenched from different temperatures. It always crystallizes in centered tetragonal system but its lattice parameters and inversion degree change by quenching. Measurements of paramagnetic susceptibility above the Curie temperature and magnetization in high fields sho…
Photoelectric effect without photons, discussing classical field falling on quantized atomic electron
Four perovskite compounds ATbO3 (A = Fe, Cr, Al, Co) are studied by means of neutron diffraction. Three Nèel temperatures are distinguished. When A is magnetic and T < TN1, the A sublattice orders in a G mode; when T < TN2, the Tb sublattice orders and is coupled with A in the same irreducible representa…
A method is proposed to determine the over-all anisotropy K in ferrimagnetic materials from initial susceptibility of single-domain grain samples. Indications on technology of single-domain grain samples are given. The Ni1−xZnxFe2O4 system is studied in detail. The upper limit of the contribution from dipolar energy h…