J. Van Landuyt、Gustaaf Van Tendeloo、S. Amelinckx1976-08-16physica status solidi (a)
Detailed electron diffraction results are given on the inter- and intrapolytypic phase transitions in tantalum disulfide and interpreted in terms of the transformation mechanisms involved. The orientation and spacing anomalies observed in the diffraction patterns are related to the incommensurate phases which are typi…
Chalcogenide Semiconductor Thin FilmsMachine Learning in Materials ScienceInorganic Chemistry and Materials
J.P. Pouget、S. K. Khanna、F. Dénoyer 等 6 位作者1976-08-16Physical Review Letters
X-ray-scattering measurements on TTF-TCNQ (tetrathiafulvalene-tetracyanoquinodimethane) above 54 K clearly reveal a new one-dimensional scattering at the wave vector $(0.59\ifmmode\pm\else\textpm\fi{}0.02){b}^{*}$ interpreted as $4{k}_{\mathrm{F}}$ scattering and attributed to an additional phonon anomaly which also c…
Quantum and electron transport phenomenaMagnetism in coordination complexesOrganic and Molecular Conductors Research
K. Ishida1976-08-16physica status solidi (a)
An attempt is made to calculate the stacking fault energy by a thermodynamic analysis. It is shown that the stacking fault energy is equal to the difference in bulk free energies between f.c.c. and h.c.p. phases in non-magnetic metals. On the other hand, the magnetic surface energy contribution to the stacking fault e…
Microstructure and Mechanical Properties of SteelsMagnetic Properties and ApplicationsMetallurgical and Alloy Processes
A. Menth、H. Nagel1976-08-15Applied Physics Letters
Sm(C00.87Cu0.13)z alloys were prepared with 7.2⩽z<8. Homogenization heat treatment yielded single-phase 2:17 material for z≳7.2. For z=7.8 some of the Co was substituted by Fe. Homogenized alloys remained single phase for up to 15% Co substituted. Remanence values BR up to 12.1 kG were reached. Coercive fields…
Hydrogen Storage and MaterialsMagnetic Properties of AlloysSuperconducting Materials and Applications
P. Csavinszky1976-08-15Physical review. B, Solid state
In this paper, Dingle's theory of the screening of impurity ions in semiconductors is generalized. This is accomplished by inserting in the theory of screening the spatial dielectric function of the medium. Poisson's equation for the potential of an impurity ion follows from one of Maxwell's equations. With the analyt…
Semiconductor materials and interfacesElectron and X-Ray Spectroscopy TechniquesSurface and Thin Film Phenomena
Rolf Landauer1976-08-15Physical review. B, Solid state
Lattice defects in a metal modify the conduction-band carrier density at the defect site. Thus transport, past the scattering caused by thermal lattice vibrations, becomes easier (or harder) in the region of changed carrier density. The resulting transport field inhomogeneities have been discussed in earlier work on e…
Electronic Packaging and Soldering TechnologiesCopper Interconnects and ReliabilitySemiconductor materials and interfaces
B. Golding、J. E. Graebner、R. J. Schutz1976-08-15Physical review. B, Solid state
The temperature dependence and magnitudes of the reciprocal decay length ${l}^{\ensuremath{-}1}$ of low-intensity longitudinal and transverse phonon pulses propagating in fused silica glass between 0.02 and 0.5 K for frequencies near 0.5 GHz are reported. The temperature dependence of ${l}^{\ensuremath{-}1}$ is in goo…
Glass properties and applicationsThermal properties of materialsThermography and Photoacoustic Techniques
K. L. Kliewer1976-08-15Physical review. B, Solid state
A nonlocal theory for the surface photoeffect produced in metals by vacuum ultraviolet radiation is presented. Using a simple electron-gas model, it is shown that $p$-polarized incident light generates, in the surface region, a strongly spatially dependent vector potential having longitudinal character; it is argued t…
Advanced Chemical Physics StudiesElectron and X-Ray Spectroscopy TechniquesSurface and Thin Film Phenomena
P. Kneschaurek、Avid Kamgar、J. F. Koch1976-08-15Physical review. B, Solid state
The energy-level spacings for electrons and holes in surface-charge layers on Si(100) are determined from a measurement of direct optical absorption of far-infrared laser radiation guided along the surface. At photon energies in the range 5.64-15.81 meV, the separation of the electric subbands is measured as a functio…
Electron and X-Ray Spectroscopy TechniquesIon-surface interactions and analysisSurface and Thin Film Phenomena
F. J. Di Salvo、D. E. Moncton、J. A. Wilson 等 4 位作者1976-08-15Physical review. B, Solid state
The physical properties of $4Hb\ensuremath{-}\mathrm{Ta}{\mathrm{Se}}_{2}$ suggest the development of two charge-density waves (CDWs) of different symmetry. Electron and neutron diffraction studies establish that layers with octahedral and trigonal prismatic (TP) coordination undergo independent transitions to CDW sta…
Perovskite Materials and ApplicationsOrganic and Molecular Conductors ResearchSolid-state spectroscopy and crystallography
D.W. Bullett1976-08-15Physical review. B, Solid state
A nonempirical localized-orbital approach is used to calculate the electronic structure of ${\mathrm{As}}_{2}$${\mathrm{S}}_{3}$, ${\mathrm{As}}_{4}$${\mathrm{S}}_{4}$, ${\mathrm{As}}_{2}$${\mathrm{Se}}_{3}$, ${\mathrm{As}}_{4}$${\mathrm{Se}}_{4}$, and ${\mathrm{As}}_{2}$${\mathrm{Te}}_{3}$ crystals. Contributions of…
Chalcogenide Semiconductor Thin FilmsCrystal Structures and PropertiesPhase-change materials and chalcogenides
Leslie V. Woodcock、C. Austen Angell、P. A. Cheeseman1976-08-15OpenAlex
Some applications of molecular dynamics calculations to the vitreous state have been examined for simple ionic MX and MX2 type glasses. The MX system which corresponds to a hypothetical vitreous and supercooled amorphous KCl is found to undergo an isobaric transition in the region of 0.3 Tf and an isothermal transitio…
Material Dynamics and PropertiesIonic liquids properties and applicationsGlass properties and applications
W. L. McMillan1976-08-15OpenAlex
The lowest-energy state of the incommensurate charge density wave (CDW) near the lock-in transition is found to be a distorted plane wave. An exact solution is found in the weak-coupling limit and the lock-in phase transition is continuous. A new defect is found in the commensurate CDW, a discommensuration, in which t…
Advanced Chemical Physics StudiesOrganic and Molecular Conductors ResearchSolid-state spectroscopy and crystallography
Richard H. Williams、Richard S. Crandall、Peter J. Wojtowicz1976-08-09Physical Review Letters
We have measured the melting temperatures of crystallized suspensions of polystyrene spheres as a function of concentration. By analyzing the data on the basis of a simple model we can estimate the heat of melting and the entropy change.
Material Dynamics and PropertiesAdvanced Mathematical Theories and Applications
Nobuhiko Sakai、Kazuo Ôno1976-08-09Physical Review Letters
The Compton scattering of circularly polarized $\ensuremath{\gamma}$ rays was used for studying the linear momentum distribution of electrons with unpaired spins in ferromagnetic iron metal. The observed Compton profile shows a broad minimum around zero momentum. The results are discussed in comparison with those calc…
Microstructure and Mechanical Properties of SteelsFusion materials and technologiesNuclear Physics and Applications
N. W. Parker、S. D. Golladay、Albert V. Crewe1976-08-01Proceedings annual meeting Electron Microscopy Society of America
The resolution and field of view attainable in electron microscopes is limited by third-order aberrations of the optical system. While considerable effort has been made to determine the effects of these aberrations on the CTEM, little work has been done for the case of the STEM, We have found that one of the advantage…
Advanced Electron Microscopy Techniques and ApplicationsAdvancements in Photolithography TechniquesElectron and X-Ray Spectroscopy Techniques
L. A. Bielman1976-08-01NASA Tech Briefs
Report describes effectiveness and materials compatibility of amine nitrites. Particularly of value to those interested in long-term corrosion protection.
Synthesis and properties of polymers
V. Beck、Albert V. Crewe1976-08-01Proceedings annual meeting Electron Microscopy Society of America
A STEM which includes a corrector for primary spherical aberration has been built and is being put into1operation. The microscope is expected to achieve a resolution of 1 Å at 50 keV. This high resolution is possible because of the correction of spherical aberration. The corrector and its operation have been described…
Advanced Electron Microscopy Techniques and ApplicationsAdvanced X-ray Imaging TechniquesElectron and X-Ray Spectroscopy Techniques
R. Dinges、D. Fröuhlich、Ch. Uihlein1976-08-01physica status solidi (b)
Abstract Exciton fine structure is measured in hexagonal AgI by two‐photon absorption. A detailed assignment of the different P‐exciton states is possible using the appropriate polarization configurations. The experimental results can be explained quantitatively taking into account anisotropy as the only perturbation…
Quantum Dots Synthesis And PropertiesSpectroscopy and Quantum Chemical StudiesNonlinear Optical Materials Studies
Herman Gershon、Larry Shanks1976-08-01Canadian Journal of Microbiology
Thirteen alpha, omega-alkanedicarboxylic acids (C2-C12, C14, and C16) and their dimethyl esters were tested against Aspergillus niger, Trichoderma viride, and Myrothecium verrucaria in Sabourauc dextrose agar at pH 4.0 AND 5.6. Toxicity to Canadida albicans, Trichophyton mentagrophytes, and Mucor mucedo was determined…
Phytochemicals and Antioxidant ActivitiesNanocomposite Films for Food PackagingFood Quality and Safety Studies