Materials Literature
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Fe 1.5 Ti 0.5 O 3 ± δ epitaxial thin films have been grown on α-Al2O3 (0001) substrates by pulsed laser deposition technique. The samples are both ferrimagnetic and semiconducting beyond room temperature. Oxygen pressure (PO2) during the deposition appears to be a critical parameter in promoting high temperature long…
Abstract A new spectrokinetic method free of any assumption is developed in this paper to investigate photochemical systems obeying ABC(3k,6ϕ) kinetic mechanisms that can be characterized by up to 14 unknown parameters for a nonpreconceived mechanism. The mathematical framework of this method is derived as an applicat…
Abstract We have investigated the interface dipole induced at C 6 H 6 /Al(111) by using density functional theory (DFT) within the generalized gradient approximation (GGA). We calculated the vacuum level shift from a simple induced density of interface state (IDIS) model and compared it with that estimated by self‐con…
P-type porous SiC layers were fabricated by anodization of a hot-pressed p-type 6H-SiC (30 kΩcm) and a 1.6 μm SiC film was deposited onto p-type Si (100) substrate by Pulsed Laser Deposition (PLD) in HF. In order to facilitate the electrochemical etching of the substrate, ethylene glycol electrolyte has been added to…
The increasing demand of integrated optical devices requires the fabrication of high-quality optically active thin films. This work focuses on lattice matched dielectric oxide thin films. The investigated film materials include sesquioxides, orthovanadates and aluminum garnets, which are promising materials as they ar…
This paper presents analytical methods to predict the magnetic field distribution, electrical parameters, and output characteristics of a high speed synchronous generator equipped with surface-mounted permanent magnet. In order to analyze the magnetic field distribution and to estimate the electrical parameters, elect…
Abstract The microstructure and composition of the interfacial layer between chemically deposited PbSe and GaAs substrates were studied using high‐resolution transmission electron microscopy (HRTEM), Auger electron spectroscopy (AES), x‐ray photoelectron spectroscopy (XPS) and energy‐filtered TEM. The thickness of the…
The temperature dependence of the spin polarization of half-metallic ferromagnets is investigated by model calculations. Emphasis is on changes in the density of states, especially on the closure of the hybridization gap. The Stoner-type calculation yields a simple one-electron expression for the gap as a function of…
Winding inductance is an important parameter in determining the performance of electrical machines, particularly those with large inductance variation. This paper investigates the influence of winding inductance variation on the performance of a three-phase three-stack claw pole permanent magnet motor with soft magnet…
We report the fabrication of (Zn,Cr)Te films at room temperature by magnetron sputtering. Various structural and elemental characterizations revealed there was only a zinc blende phase from the ZnTe host and Cr atoms were distributed uniformly in these films. The magnetization measurement by superconducting quantum in…
We report O K-, Ca Kand L3,2-, and Ti L3,2-edge X-ray absorption near edge structure (XANES) spectra of Ba1 xCaxTiO3 (x 1⁄4 0; 0.01, 0.08, and 1) and the electronic properties inferred from these XANES spectra. The spectra of O K-, Ca L3,2and Ti L3,2-edges show characteristic spectral features attributable to the t2g…
The first order reversal curves (FORCs) technique has been extensively used in the last years for the identification of parameters of Preisach-type models of hysteresis. The technique proved both accurate and robust for the identification of the Preisach distribution function but due to the relatively high computation…
The correlation between the crystalline quality of low-temperature GaN (LT-GaN) films and current collapse in AlGaN∕GaN heterostructure field-effect transistors with a LT-GaN cap layer was investigated. LT-GaN cap layers were grown at various temperatures ranging from 450to700°C. No current collapse was observed for h…
We report on near-field optical observations of surface-plasmon-mediated light emission in electrically biased metal-insulator-semiconductor (MIS) tunnel junctions fabricated from Au and p-type Si with a native oxide layer as the tunneling barrier. Our junctions exhibit stable broadband macroscopic light emission in t…
Using the theory of Eliashberg and Nambu for strong-coupling superconductors, we have calculated the gap function for a model superconductor and a selection of real superconductors including the elements Al, Sn, Tl, Nb, In, Pb, and Hg and one alloy, ${\mathrm{Bi}}_{2}\mathrm{Tl}$. We have determined the temperature-de…
S. Wakimoto, K. Yamada, J. M. Tranquada, C. D. Frost, R. J. Birgeneau, and H. Zhang 1 Quantum Beam Science Directorate, Japan Atomic Energy Agency, Tokai, Ibaraki 319-1195, Japan 2 Institute for Materials Research, Tohoku University, Katahira, Sendai 980-8577, Japan 3 Brookhaven National Laboratory, Upton, New York 11…
North Carolina State University Theses Textile Engineering, Chemistry and Science.
In a magnetized cylindrical plasma produced with the electron cyclotron resonance (ECR) scheme, a sheared E × B -flow showing zonal flow (ZF) characteristics has been driven by ECR power modulation. This method was used to control the sheared flow, and allowed us to observe that a coherent mode (spontaneously driven i…
Low temperature plasma channels with widths as small as 20μm, cross-sectional areas of 400–12000μm2, and aspect ratios (channel length to width) of up to 104:1 have been generated on a steady state basis within sealed microcavity trenches fabricated by replica molding. With lengths up to 1m and volumes of 10−5–∼10−2cm…
Jetzt gibt's Druck! Komprimierte Gase wie CO2, Ethen, Ethan oder Propan induzieren die Bildung von Nanoemulsionen mit besonderen Eigenschaften. Mit CO2 erhaltene Nanoemulsionen wurden zur Präparation von porösem vernetztem Polystyrol verwendet, und die stabilisierende Wirkung von CO2 auf Emulsionen für die verbesserte…