Materials Literature
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The resonant photoemission of iron films on copper has been examined near the 3p to 3d excitation threshold using synchrotron radiation from the MAX storage ring. Resonant profiles are presented in the photon energy range 46-150 eV. Special attention has been paid to the position of the destructive minimum before the…
The electronic structure of orthorhombic potassium niobate has been studied with a particular focus on empty electronic states. Occupied electronic states were analysed by X-ray photoelectron spectroscopy. Empty electronic states were probed by X-ray absorption spectroscopy at the oxygen K edge (531 eV), the niobium L…
We have analysed by use of synchrotron radiation induced angle resolved photoemission spectroscopy (PES), Auger electron spectroscopy (AES) and low-energy electron diffraction (LEED) the growth of ultrathin Co layers deposited at room temperature on Pt(111) surfaces. The LEED patterns indicate an incoherent epitaxy an…
The extremely large zero-field splitting of Fe 3+ ions at the tetragonal FeF 5 O site in Fe 3+ :KMgF 3 crystals has been interpreted on the basis of a second- to sixth-order perturbation approach, in which the spin-orbit coupling is regarded as the perturbation to the crystal-field and electrostatic interactions. The…
Pr3+-doped As-S chalcogenide fiber is fabricated using a double-crucible method. The thermal and spectroscopic properties of Pr3+-doped As-S glasses are clarified. Pr3+-doped As-S fiber is shown to be a promising candidate that will lead to efficient Pr3+-doped fiber amplifiers.
GaInO3 is recently identified transparent conducting material which is structurally and chemically distinct from indium tin oxide [R. J. Cava, J. M. Phillips, J. Kwo, G. A. Thomas, R. B. van Dover, S. A. Carter, J. J. Krajewski, W. F. Peck, Jr., J. H. Marshall, and D. H. Rapkine, Appl. Phys. Lett. 64, 2071 (1994)]. We…
We have studied the influence of nitrogen impurities in CH4/H2 gas mixtures on the structure and morphology of polycrystalline diamond films prepared by microwave plasma assisted chemical vapor deposition. The nitrogen concentration in the process gas was varied between 1 and 1000 ppm. Optical emission spectroscopy wa…
Small-angle neutron scattering experiments have revealed an epitaxial relationship between the hexagonal cylinder phase, and a bicontinuous cubic phase with $\mathrm{Ia}\overline{3}d$ space group symmetry, in a poly(styrene)-poly(2-vinylpyridine) diblock copolymer mixture. Proximity to the order-disorder transition an…
Carbon nitride films deposited by three different methods have been analyzed using in situ Auger electron spectroscopy and ex situ x-ray photoelectron spectroscopy (XPS) and Rutherford backscattering spectrometry. The XPS data for all 27 samples indicate that these films have a similar composition consisting of two ph…
Based on the phase shifts due to the total internal reflection and the grating diffraction, a new type of quarter-wave plate using substrate-mode holograms is presented. A sample of this device was fabricated to demonstrate its function.
Abstract The functional integral formalism, combined with a Monte‐Carlo calculation for the magnetization of rare‐earth spins, is used to describe the magnetic properties of RT 2 compounds. The results of the numerical solution of the coupled self‐consistent equations, involving both itinerant d electrons and localize…
Four coils have been built and installed in the JET vacuum vessel to produce divertor plasmas. The coils are copper with glass epoxy insulation and are enclosed in vacuum tight Inconel cases. At the coil contractor's factory, the coil parts were manufactured and process techniques qualified. In the JET vacuum vessel t…
Superdislocations on the 〈110〉{111} system in single-crystal Al6 7Cr8Ti25 have been studied using weak-beam transmission electron microscopy. It was found that the superdislocations are dissociated into superlattice intrinsic stacking-fault-coupled ⅓〈112〉 superpartials at 77 K but into antiphase-boundary (APB)-coupled…
Abstract The shape of spectrum in XPS depends on processes in the sample and on the properties of measurements systems. Noise, electron energy analyser resolution, electron inelastic scattering in the sample and analyser, and non‐monochromatic radiation produce a quality reduction of spectrum for quantitative analysis…
The uniformity of resistivity in a magnetron sputtered indium tin oxide (ITO) film has been improved by controlling plasma distribution near the substrate. Plasma distribution was controlled by setting the auxiliary electro magnet around the target. Langmuir probe measurement showed that the plasma density and energy…
An apparatus has been developed to determine twisting rigidities of woven fabrics by subjecting fabric samples to monotonically increasing twist. In order to avoid slack in the test specimen and permit a reliable measurement, tensioning weights are applied. The twisting moment acting on the fabric is measured, along w…
Measurements of apparent thermal conductivity for specimens of rigid polyisocyanurate (PIR) foam cut from a commercial insulation product and aged in air at 60°C and different humidities are presented. Eight specimens, nominally 600 by 600 mm, were prepared from two boards (1.2 by 2.4 by 0.05 m) of rigid PIR foam blow…
Tubing lifetime in HCI service, defined as the time to begin particle shedding due to corrosion, can be estimated by the method described in this paper. This could provide an additional selection criterion for materials used in corrosive applications. In this method, particle shedding by a length of electropolished st…
Abstract The results of thermal annealing at 800 and 900 °C of porous silicon samples in N 2 ambient conditions are discussed as a function of annealing time, annealing procedure, and sample preparation. The results show that N 2 annealing plays an important role in surface passivation and nanostructure feature size s…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTChain Cluster Polymerization and Alkali Metal Intercalation into Niobium DitellurideR. Guzman, J. Morales, and J. L. TiradoCite this: Inorg. Chem. 1994, 33, 14, 3164–3168Publication Date (Print):July 1, 1994Publication History Published online1 May 2002Published inissue 1 Ju…