Materials Literature
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Bei der Reaktion von Fe3(CO)12 mit den Dithiolen (II) im Molverhältnis 1:1 entstehen die zweikernigen Komplexe (III), von denen einige bereits mit wesentlich geringerer Ausb. dargestellt wurden.
We present a theory of the dielectric permittivity in which the intermolecular dipole-dipole correlations are treated explicitly. The results for the static permittivity agree with those which have previously been obtained by continuum calculations. The frequency dependence of the permittivity is related to two relaxa…
The shear elastic modulus C44 of graphite has been determined by Brillouin scattering from surface waves. The author's value agrees with that obtained from neutron scattering experiments but differs from those determined by ultrasonic technique.
Cathodoluminescence in the 1.40 eV and 2.56 eV systems is observed from most nitrogen-containing synthetic diamonds. The authors show that there is a tendency for the 2.56 eV luminescence to be strong when the 1.4 eV luminescence is strong, and that both are strongest for diamonds grown in the presence of nickel. Abso…
Thermoluminescence measurements of 80 K X-irradiated MgO and MgO:Li single crystals are performed. In pure MgO four glow peaks, observed at 175, 220, 245, and 265 K, are associated with the release of holes from different traps. All these glow peaks show two emission bands at 375 and 700 nm (the latter due to Cr3+ ion…
Space-charge-limited (SCL) currents in materials with quasicontinuous energy distribution of localized states are discussed. A simple analytical method is developed enabling to extract quantitative information about an arbitrary energetic distribution of localized states from a single experimental SCL current-voltage…
In continuation of the investigations of the electrical and thermal conductivity as well as the magneto resistance in the binary system titanium-oxygen for TiOx with metallic conductivity for x < 1.49 the corresponding properties for the semiconductive compounds with 1.49 < x < 2 are measured at low temperatures and m…
Resistivity, Hall-effect, and space-charge---limited---current (SCLC) measurements were performed on InSe single crystals grown by the Bridgman-Stockbarger method. The electrical properties of the investigated samples are dominated by two donor centers at 0.10 and 0.34 eV. The latter donor influences the SCLC at room…
For glassy materials relaxation as a function of time is generally well fitted with the Williams–Watts function exp[−(t/τ0)β] with β≊1/3. One frequently interprets such nonexponential behavior in terms of a superposition of exponential relaxation processes with density ρβ(τ). We have determined ρβ(τ), corresponding to…
A range of high purity type III synthetic silicas (Suprasil 1, Spectrosil, Dynasil 1000) has been subjected to 100 keV X irradiation at 77 K and the induced ESR spectra have been recorded at 100 K before and after successive pulse anneals to higher temperatures. Absolute spin concentrations are determined as functions…
We report photoemission spectra and intensity profiles of the $3d$ emission and the resonant valence-band satellites in NiO and Ni. Ni in Ni metal is in a $3{d}^{9}$ configuration, but Ni in NiO is in a $3{d}^{8}$ configuration. NiO gives an opportunity to study the effect of a larger number of holes in the $d$ config…
$k$-resolved inverse photoemission spectra taken on Ni(001) and Cu(001) show a weak peak at an apparent energy within a bulk band gap and close to the vacuum level. Comparisons with the energy-loss function $|\mathrm{Im}(\frac{1}{\ensuremath{\epsilon}})|$ show that it may be due to an energy-loss satellite. Surface st…
Complete dielectric isolation of silicon regions 45 μm wide for microcircuits on silicon substrates is demonstrated by selective formation of oxidized porous silicon in heavily doped n-type regions. Anodic etching of n-type silicon in a hydrofluoric acid electrolyte exhibits a concentration-dependent voltage threshold…
A three-step design procedure is developed for dielectric stacks which are required to be nonpolarizing for a given wavelength lambdar and angle of incidence theta 0,r, at which the reflectance Rr is prescribed. The method leads to solutions in which only three layer materials occur and can be applied for a wide range…
We present a general thermodynamic model of the bound magnetic polaron which takes into account the f$\stackrel{\mathrm{\ifmmode \dot{}\else \.{}\fi{}}}{\mathrm{r}}$ee energies of the localized spins, of the free carriers, of the electrons localized in the bound magnetic polarons, and of the electrons trapped on impur…
The molecular dynamics (MD) computer simulation technique was used to simulate the vitreous silica (v-SiO2) surface. A modified Born–Mayer–Huggins potential function was used in the simulation; periodic boundary conditions in two dimensions (x and y) only were used to create a thin slab with free surfaces in the z dir…
Measured valence-band photoelectron spectra for the transition-metal glasses ${A}_{x}{\mathrm{Zr}}_{100\ensuremath{-}x}$ ($A=\mathrm{F}\mathrm{e},\phantom{\rule{0ex}{0ex}}\mathrm{C}\mathrm{o},\phantom{\rule{0ex}{0ex}}\mathrm{N}\mathrm{i},\phantom{\rule{0ex}{0ex}}\mathrm{C}\mathrm{u},\phantom{\rule{0ex}{0ex}}\mathrm{R}…
Electron-spin resonance (ESR) is used to investigate the formation and thermal anneal characteristics of ${E}_{1}^{\ensuremath{'}}$ centers in high-quality synthetic quartz. These centers are produced by ionizing radiation near room temperature followed by annealing to 300\ifmmode^\circ\else\textdegree\fi{}C. The resu…
Get PDF Email Share Share with Facebook Tweet This Post on reddit Share with LinkedIn Add to CiteULike Add to Mendeley Add to BibSonomy Get Citation Copy Citation Text Toshiaki Kita, Tatsuo Harada, N. Nakano, and H. Kuroda, "Mechanically ruled aberration-corrected concave gratings for a flat-field grazing-incidence sp…
X-ray photoelectron (XPS) spectra of the valence bands of approximately 60 Ni and Pd alloys and intermetallic compounds with 20 different elements are presented. In alloys with electropositive elements the Ni and Pd $d$-band centroids move to larger binding energies and the density of $d$ states at the Fermi level (${…