Browsing by Subject "Physics"
Now showing items 21-40 of 549
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Analysis of the foam-forming of non-woven lightweight fibrous materials using X-ray tomography
(2021)Foam-forming has in the past predominantly been used to create two-dimensional sheet-like fibrous materials. Allowing the foam to drain freely and decay under gravity, rather than applying a vacuum to remove it rapidly, ... -
Analyzing refractive index changes and differential bending in microcantilever arrays
(2008)A new microcantilever array design is investigated comprising eight flexible microcantilevers introducing two solid bars, enabling to subtract contributions from differences in refractive index in an optical laser read out ... -
Angular Distribution of electron temperature and density in a laser-ablation plume
(American Physical Society, 2000)The angular distribution of electron temperature and density in a laser-ablation plume has been studied for the first time. The electron temperature ranges from 0.1 to 0.5 eV and is only weakly dependent on the angle in ... -
Anisotropic ferromagnetism in substituted zinc oxide
(2004)The high-temperature ferromagnetism in doped zinc oxide films was discussed. A connection between the electronic structure of (Zn 1-xMx)O and its ferromagnetic properties was found. A new source of magnetism in these oxides, ... -
Anisotropy of orbital moments and magnetic dipole term Tz in CrO2. An ab initio study
(American Physical Society, 2004)A systematic study is performed by the ab initio density-functional theory of the anisotropy of the orbital moments (lz) and the magnetic dipole term (Tz) in bulk CrO2. Two different band-structure techniques are used (full ... -
Annealing of CoFeB/MgO based single and double barrier magnetic tunnel junctions: Tunnel magnetoresistance, bias dependence, and output voltage
(American Institute of Physics, 2009)Co40Fe40B20/MgO single and double barrier magnetic tunnel junctions (MTJs) were grown using target-facing-target sputtering for MgO barriers and conventional dc magnetron sputtering for Co40Fe40B20 ferromagnetic electrodes. ... -
Antiferromagnetic single-layer spin-orbit torque oscillators
(2019)We show how a charge current through a single antiferromagnetic layer can excite and control self-oscillations. Sustained oscillations with tunable amplitudes and frequencies are possible in a variety of geometries using ... -
ASCA observations of the composite warm absorber in NGC 3516
(American Astronomical Society, 1996)We obtained X-ray spectra of the Seyfert 1 galaxy NGC 3516 in 1995 March using the Japanese X-ray satellite, ASCA. Simultaneous far-UV observations were obtained with the Hopkins Ultraviolet Telescope on the Astro-2 shuttle ... -
Atomic coordination and the distribution of electric field gradients in amorphous solids
(American Physical Society, 1981)The observation of nuclear quadrupole interactions in amorphous solids provides a unique possibility of obtaining information about the angular distribution of local ionic coordinations, complementary to the information ... -
Atomistic simulations of highly conductive molecular transport junctions under realistic conditions
(2013)We report state-of-the-art atomistic simulations combined with high-fidelity conductance calculations to probe structure–conductance relationships in Au–benzenedithiolate (BDT)–Au junctions under elongation. Our results ... -
Band gap engineering of In2O3 by alloying with Tl2O3
(2013)Efficient modulation of the bandgap of In 2 O 3 will open up a route to improved electronic properties. We demonstrate using ab initio calculations that Tl incorporation into In 2 O 3 reduces the band gap and ... -
Band structures of rare gas solids within the GW approximation
(2005)Band structures for solid rare gases s Ne, Ar d have been calculated using the GW approximation. All electron and pseudopotential ab initio calculations were performed using Gaussian orbital basis sets and the ... -
Biaxial order parameter in the homologous series of orthogonal bent-core smectic liquid crystals
(2013)The fundamental parameter of the uniaxial liquid crystalline state that governs nearly all of its physical properties is the primary orientational order parameter (S) for the long axes of molecules with respect to the ... -
Bistable self-electro-optic operation of strained In0.1Ga0.9As/GaAs asymmetric Fabry Perot modulators
(1991)We report bistable operation of a strained-layer InGaAs/GaAs asymmetric Fabry-Perot optical modulator configured as a self-electro-optic effect device (SEED) operating in reflection mode. Bistable loops are observed from ... -
Buckling of a linear chain of hard spheres in a harmonic confining potential: Numerical and analytical results for low and high compression
(2020)We extend a previous analysis of the buckling properties of a linear chain of hard spheres between hard walls under transverse harmonic confinement. Two regimes are distinguished—low compression, for which the entire chain ... -
Calculation of model Hamiltonian parameters for LaMnO3 using maximally localized Wannier functions
(2010)In this work we demonstrate that maximally localized Wannier functions (MLWFs) based on Kohn-Sham band structures provide a very robust and systematic way to construct realistic, materials-specific tight-binding models for ...