Materials Literature
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Mg(0001) has been studied with angle-resolved photoemission spectroscopy for photon energies in the range 7.0-26.8 eV. The polar-angle dependence of the photoelectron emission was recorded along the two symmetry lines $\overline{\ensuremath{\Gamma}}\overline{M}$ and $\overline{\ensuremath{\Gamma}}\overline{K}$ of the…
To cancel the average bulk macroscopic field compensating charge should be induced on the polar surface of compound crystals. In this paper we clarify the mechanism of the charge compensation by performing the DV-X α calculations on the clusters M 13 X 13 representing the polar surface of the rock-salt type crystals.…
High field magnetization and transverse magnetoresistance of itinerant electron helical magnet MnSi are investigated at temperatures between 4.2 K and 77 K in pulsed field H 0 up to 500 kOe. Large high field susceptibility and negative magnetoresistance are obtained reflecting a large spin fluctuation in this compound…
The first-order Raman spectrum of crystalline Ce${\mathrm{O}}_{2}$ was measured at various temperatures from 300 to 850 K. On the other hand, the linewidth was calculated quantitatively theoretically with consideration of only the cubic anharmonic term of the Coulomb and repulsive parts in the crystal potential energy…
The space group of the antiferroelectric phase of lead zirconate is determined to be Pbam by conventional and convergent beam electron diffraction (CBED). The coordinates of the oxygen atoms are determined by fitting the computed intensities of 2 k 1, 3 k 1 and 4 k 1 reflections to the experimental ones obtained from…
The first stage of the room-temperature $F$-center coloring in europium-doped KCl has been investigated as a function of the impurity concentration as well as of the aggregation-precipitation state of the europium ions in the crystal with the use of optical-absorption, photoluminescence, electron-paramagnetic-resonanc…
Unpolarized and magnetic-field-induced circularly polarized luminescence spectra are reported for Eu3+ doped into the cubic Cs2NaYCl6 host. These spectra were obtained at high resolution under variable temperature conditions, and they span the 5DJ(J = 0–3)→7FJ(J = 0–5) transition regions of Eu3+. A detailed analysis o…
The thermal conductivity of polycrystalline, cubic CuCl has been measured from 100 to 480 K and pressures from 0.5 to 2.7 GPa by a transient hot-wire technique. The heat transport is produced by phonons. The absolute value of the conductivity is low and becomes nearly temperature independent at high temperatures where…
By studying the tetrathiafulvalene-chloranil (TTF-CA) complex the different of electron---molecular-vibration ($e$-mv) interactions in the Raman and infrared spectra of mixed-and segregated-stack one-dimensional compounds are compared and interpreted. In mixed-stack crystals, besides the well-known infrared effects, t…
The optical transmission and indices of refraction for the cubic isomorph of ZrO(2) stabilized with 12.0-mol % Y(2)O(3) were measured at various temperatures and for a range of wavelengths from 0.36 to 5.1 microm. Index data to +/-5 x 10(-5) were fitted to a three-term Sellmeier equation. The value of N(D) = 2.15847.…
The variation of the resistivity with thickness d and bulk electron mean free path lambda infinity of thin metal films with unlike surfaces is calculated using Soffer's angularly dependent surface scattering model (1967). Tabular values for the resistivity enhancement due to a range of surface roughness combinations a…
A spectroscopic survey of a large number of natural brown and yellow diamonds shows that the H3 centre (a vacancy plus an A-aggregate of nitrogen) is observed in absorption quite frequently in brown diamonds and occasionally in yellow samples. The H4 centre (a vacancy plus a B-aggregate of nitrogen) occurs much less f…
Abstract The copolymerizations of 4(5)‐vinyl‐1,2,3‐triazole, 1‐ p ‐bromophenyl‐4‐vinyl‐1,2,3‐triazole and 2‐methyl‐5‐vinyltetrazole with styrene, methyl methacrylate and vinyl acetate have been examined and the corresponding copolymerization parameters r 1 , r 2 were evaluated. The reactivities Q of these monomers are…
The temperature dependences of the mean square fluctuation of the displacement of the lattice ions and of the local spectral density at the lattice ions sites in KH 2 PO 4 have been evaluated as a function of the ratio between the correlation length xi and the range of the proton-lattice ion interactions. A comparison…
Uniaxial compression of plates of brittle materials containing pre‐existing planar cracks oriented at certain angles with respect to the direction of overall compression has revealed that the relative frictional sliding of the faces of the pre‐existing cracks may produce, at their tips, tension cracks which deviate at…
Donor-donor and donor-acceptor dynamics in ${\mathrm{La}}_{1\ensuremath{-}x}{\mathrm{P}}_{5}{\mathrm{O}}_{14}:{{\mathrm{Nd}}_{x}}^{3+}$ are measured directly with a high-resolution, near-ir laser system. Time-resolved fluorescence line-narrowing measurements show an absence of rapid donor-donor transfer below 20 K and…
Ferrimagnetic oxides with hexagonal crystal structures (referred to as hexagonal ferrites) are characterized primarily by their foliate (leaf-like or platelet) structure and high anisotropy fields. These properties allow for the preparation of polycrystalline grain oriented magnetic compounds with controlled values of…
Abstract The absorption of pure chlorine into aqueous sodium carbonate solutions accompanied by the desorption of carbon dioxide was studied both theoretically and experimentally. The absorption rates of chlorine and the desorption rates of carbon dioxide were measured at 25°C using a baffled agitated vessel operated…
The electromagnetic equations of the motor are written, then transformed by the finite difference technique. Both the infinite extent of the secondary and the finite extent of the iron are taken into account by the partition method. Actual width of the iron and the secondary are considered. Most of the unknowns are el…
Article Phase Relations in the Beryllium-rich Section of the System Beryllium-Copper-Iron was published on August 1, 1982 in the journal International Journal of Materials Research (volume 73, issue 8).