Showing papers in "Journal of Physics and Chemistry of Solids in 1969"

TL;DR: In this paper, the polarization behavior of zirconia-yttria solid electrolyte specimens with platinum electrodes has been studied over a temperature range of 400° to 800°C and a wide range of oxygen partial pressures.

TL;DR: In this paper, the binding energy shifts of Cl s electrons in Group 4b, 5b and 6b carbides and of core electrons in Ti and V compounds are discussed and compared with X-ray spectroscopic investigations and energy band calculations.

TL;DR: In this article, it was shown that in covalent crystals the 4s-bonding of the impurity dominates over the 3d bonding in terms of unpaired spin density.

TL;DR: In this paper, the optical properties of single crystals near the fundamental absorption edge of the following layer compounds: Sn Sx Se2−x (where 0 ⩽ x⩽ 2), ZrS2, ZrSe2, TiS2 and CdI2.

TL;DR: In this article, lattice thermal conductivity data at room temperature were compiled for more than 200 semiconductors, and the data for over seventy semiconductor compounds were obtained at their laboratory and were previously unpublished.

TL;DR: In this paper, it was shown that the fast electron hopping process in magnetite is essentially a pair-localized phenomenon, with the non-paired octahedral Fe 3+ ions not participating in the hopping process.

TL;DR: The Stokes-Raman spectra of vitreous silica, germania, and sodium silicate glasses have been obtained in the frequency shift region extending from 10 to 1300 cm −1 as mentioned in this paper.

TL;DR: In this article, the vibrational entropy of the crystal was used as a correction in expressions giving the repulsive exponent in the two-parameter empirical Born model and the resulting smooth thermodynamic data have been used to obtain values of the constant volume temperature coefficient of the isothermal bulk modulus, d ln BT d T) V and of d B T d P) T.

TL;DR: Antiphase boundaries (APB s) as discussed by the authors are defect surfaces in semiconducting compounds, where the excess atoms of one of the constitutents of the compound are incorporated.

TL;DR: In this article, the electrical conductivity of single crystal lithium niobate (LiNbO3) was determined as a function of temperature for various oxygen partial pressures, which can be explained by a defect equilibrium involving singly ionized oxygen vacancies and electrons.

TL;DR: In this article, measurements of the elastic moduli of aluminum over the temperature range 300°-930°K are reported, and a high temperature Gruneisen constant of 2·17 is calculated.

TL;DR: In this paper, the scheelite structure fluoride LiYF 4 has been grown doped with 0.24, 1.4 and 2.2 at 77° and 300°K.

TL;DR: In this paper, the density of states of the spectrum E(k)=E 0 −E 1 Σ {δ} e i(kδ) which occurs for different types of elementary excitations in solids, when only next neighbor interactions are taken into account (with Δ being the next neighbour lattice vectors), were computed and tabulated for the cubic space groups.

TL;DR: In this article, a quasi-chemical approach has been used as the basis for a calculation of the phase diagram for a general ternary system A, B. C containing the binary compounds AC and BC which are stoichiometric and completely miscible.

TL;DR: In this article, a single-oxygen-vacancy E-defect model for E'center geometry is proposed. The model is based on the spectroscopic data and experimental results on generation and bleaching of paramagnetic vacancy centers in α-SiO 2 :Ge.

TL;DR: In this article, a first order quasi-chemical treatment of binary interstitial solute solutions has been given and the enumeration of the nearest neighbor pairs is simplified by only considering those pairs whose number depends on the atomic configuration of the solution.

TL;DR: The β-Ga 2 O 3 compound shows at least three different emission bands depending on the choice of the dope as mentioned in this paper, i.e., blue, green and u.v. emission.

TL;DR: In this paper, a large number of silicon samples containing oxygen and carbon impurities after various doses of irradiation at room temperature by 2 MeV electrons have been measured in the range 1-25 μm for a number of different silicon samples.

TL;DR: In this paper, the properties of isolated carbon and carbon-oxygen complexes have been studied in silicon containing various carbon isotopes and the strength of the local mode absorption has been confirmed.

TL;DR: In this paper, the thermodynamics of single superparamagnetic particles are studied by means of a Monte Carlo technique which was recently derived for the calculation of compact ferromagnets, and an exact (numerical) calculation of the magnetization and of the internal energy of the particle is obtained.

TL;DR: Normal incidence reflectance of BeO single crystals, analyzed by Kramers-Kronig inversion for dielectric function and energy loss function as discussed by the authors, was found to be normal.

TL;DR: In this article, a method was developed and employed for an LCAO-MO semiquantitative determination of valence bands, which seems generally advantageous for complex solids with important covalent bonding effects.

TL;DR: The liquidus isotherms in the Ga rich comer of the Ga-Al-As phase diagram have been determined from 800 to 1100°C and at 1000°C the corresponding solidus equilibrium isotherm was obtained as discussed by the authors.

TL;DR: In this article, the diffusion coefficient of O-18 in CoO has been measured in the temperature range from 1175° to 1560°C in undoped CoO and in crystals containing from 0.1 to 0.5 molar percent of aluminum or lithium.

TL;DR: In this article, a detailed thermodynamic study of the Fe 1−x O phase has been carried out in the temperature range 700°-1350°C using solid state electrochemical techniques.

TL;DR: In this paper, the authors presented new measurements of Ti K absorption and emission spectra from TiC, TiN, TiO, TiB 2, and TiC and discussed the results in conjunction with other X-ray and electron spectroscopical investigations.

TL;DR: In this article, the authors show that the number of F centers generated by X-ray irradiation between 200° and 600°K is proportional to the square root of the irradiation time.

TL;DR: In this article, the rate of photochemical decomposition of lead halides by u.v. light was investigated by measuring the change of the optical density Δ D after irradiation, and it was found that the time dependence of photolysis in PbCl 2, PbBr 2 and PbI 2 is not essentially different.

TL;DR: In this paper, the infrared reflectivity of EuO, EuS and EuSe has been measured at room temperature and the results were analyzed by classical dispersion theory to obtain dielectric response and the long wavelength optical phonon frequencies of these materials.

TL;DR: In this paper, the selfdiffusion coefficient of Al3+ and Cr3+ ions in MgO was calculated and the interdiffusion coefficients increased with the mole fraction of cation vacancies.