Showing papers in "Journal of Physics and Chemistry of Solids in 1987"

TL;DR: The thermal conductivity of AIN has been measured from 0.4 to 1800 K as discussed by the authors, and it has been shown that the heat conduction is by phonons and that at the lowest temperatures the phonon mean-free-path, l, is limited by boundary scattering.

TL;DR: In this article, film-induced stress-corrosion cracking (SCC) was studied for many metals including stainless steels, Cu-Al alloys, α-brasses, and pure copper.

TL;DR: The literature pertaining to the first-row transition metal ternary oxides of the type LiMO2 with M = Sc-Cu, is reviewed in this article, where the relation of the d-orbital contraction to the intercation separation as the series is traversed appears to be the critical factor in producing the wide variety of magnetic behaviors within the series.

TL;DR: In this paper, photo-electrochemical measurements of n-type CuFeO2, doped with Sn, are found to be 4.9 eV below the vacuum level.

TL;DR: In this paper, it is shown that the stress dependence of the thermoelastic constant can be explained by the temperature dependence of elastic properties of the material, and excellent agreement between the theoretical predictions and experimental data is achieved.

TL;DR: In this article, the lattice constant variation with the size of the cation occupying the B-site is similar for both mixed (AB 0.5′B0.5″O2) and simple ABO2 delafossites.

TL;DR: In this article, the elasticity of single crystal sodium chloride has been studied by the Rectangular Parallelepiped Resonance (RPR) method up to 770 K (≅ 2.5 times the Debye temperature).

TL;DR: In this paper, heat capacities of pure and KOH (mole fraction 18 × 10−3)-doped cubic ices were measured at nearly atmospheric pressures in the temperature ranges of 12-160 K and 80-160 k, respectively.

TL;DR: In this article, a band structure model derived from Zintl's concept is used to model the magnetic properties of CaNi 2 P 2, LaNi 2 p 2, GdNi 2p 2, and SmNi 2P 2 with a Neel temperature of 10.5 K.

TL;DR: In this paper, a detailed review of fracture behavior exhibited by glass and ceramic materials is presented with particular emphasis on the understanding gained through the use of deliberately introduced, controlled cracks, including the structure of crack tips, environment assisted crack growth, high temperature fracture and the toughening of ceramics.

TL;DR: In this paper, the spin transition behavior in the iron(II) complex [Fe(2−pic)3]Cl2·MeOH (2+pic = 2−aminomethylpyridine) is discussed within a previously developed model which describes the High Spin (HS) ag Low Spin (LS) transition on the grounds of the elasticity theory.

TL;DR: In this paper, a diamond anvil cell up to 15 GPa was used to study the pressure dependences of the Raman active modes in yttrium vanadate (YVO4) crystallizing in the zircon-type structure D4h19 (I41amd), with a = 5.04 A and c = 11.24 A near 7.5 GPa.

TL;DR: In this article, a semi-empirical form of molecular orbital has been used to construct the energy levels of the chromophore of a unit cell and the charge transfer processes between Co 2+ and Co 3+ and from oxide ligands to the metal ions have been identified and assigned to the major features of the spectrum.

TL;DR: In this article, the effects of chemical attack of bonds at a crack tip and the basic physical cause for a material to exhibit a tough (desirable) or a brittle (undesirable) overall aspect are discussed.

TL;DR: In this article, the electronic structure of SnO2, GeO2 and TeO2 in the rutile crystal structure was calculated using the scalar-relativistic linear muffin-tin-orbital method.

TL;DR: In this article, the magnetic susceptibilities of the rare earth orthovanadates RVO4 (where R is a rare earth ion, Ce-Lu, or Y) have been measured in the temperature range 3.5-300 K.

TL;DR: In this article, a review of thin films of highly conjugated organic polymers and macrocyclic ligands is presented, focusing on the deposition, characterisation and utilisation of thin thin films.

TL;DR: In this paper, the role of the interatomic potential, the local stresses at the crack tip, dymamic simulations with emphasis on the crack propagation velocity, and some environmental effects on fracture are reviewed.

TL;DR: In this article, a simple model for grain boundary relaxation is used to analyze the measured elastic behavior, and the value of the activation energy of grain boundary diffusion is derived from the comparison of the data with the model.

TL;DR: In this article, the mechanics of crack tip plasticity in dynamic crack growth is considered as it influences two modes of dynamic fracture, i.e., cleavage and micro-void nucleation, growth and coalescence.

TL;DR: The Raman and IR vibrational spectra of C-type rare earth sesquioxides exhibit anomalous wavenumber decreases for europium and ytterbium (f13) oxide which have not been previously reported as discussed by the authors.

TL;DR: In this paper, a review of crazes in glassy thermoplastic polymers is presented with particular emphasis on those aspects of craze properties that influence and control fracture behavior.

TL;DR: In this article, it was shown that In-doped CdTe grown by THM is electrically compensated and that Incontaining neutral associates or precipitates play a minor role in the compensation mechanism.

TL;DR: In this paper, the electronic susceptibilities, energy gaps and the bond ionicities of some AIBIIIC2VI chal-copyrite compounds have been calculated from their plasmon energy.

TL;DR: In this paper, the vapor pressure of InN has been determined experimentally using a static pressure measurement technique and the measurements give log 10 P N 2 = 9.78−13649/T, and are in excellent agreement with previous calculations and, they believe, represent a significantly more accurate estimate of the thermal stability.

TL;DR: In this paper, a new criterion for superconductivity was proposed, which can be applied to all the elements in the periodic table, and the criterion showed that the values of electronegativity of all superconducting elements concentrate in a narrow range from 1.3 to 1.9 and that elements with values outside this region would be non-superconductive.

TL;DR: In this paper, the defect structure of Sc3+-doped ceria was investigated using both anelastic and dielectric relaxation peaks and a new low temperature relaxation with activation enthalpy near 0.2 eV was observed; it was shown to be due to a low symmetry off-center configuration of an isolated ScCe defect.

TL;DR: In this article, the authors show that the tunnel effect at low temperature is limited to domains separated by vacancies, associated with 5 times more electron holes, and by regions where short-range order prevails.

TL;DR: In this paper, the influence of doping with acceptor ions like Pr3+ or Nd3+ on the intensity and decay characteristics of the Eu3 emission was investigated and it was shown that energy migration occurs essentially inside the chains.

TL;DR: In this paper, the authors reviewed the recent developments in the understanding of the dislocation-crack interaction and its relationship to the phenomena of crack tip deformation and fracture toughness and concluded that dislocations emitted from a crack tip are repelled from the crack tip and this repulsive interaction is responsible for the formation of a dislocation free zone.