Noboru Yamazaki、Makoto Matsumoto、Fukuji Higashi1975-06-01OpenAlex
Abstract Poly‐ p ‐benzamide of high molecular weight (η inh = ∼ in H 2 SO 4 ) was obtained by the direct polycondensation reaction of p ‐aminobenzoic acid ( p ‐ABA) by means of diphenyl and triaryl phosphites in N ‐methylpyrrolidone (NMP)‐pyridine solution containing lithium and calcium chlorides. Molecular weight of…
Synthetic Organic Chemistry MethodsOrganophosphorus compounds synthesisSynthesis and properties of polymers
S. R. Bodner、Yehuda Partom1975-06-01OpenAlex
A set of constitutive equations has been formulated to represent elastic-viscoplastic strain-hardening material behavior for large deformations and arbitrary loading histories. An essential feature of the formulation is that the total deformation rate is considered to be separable into elastic and inelastic components…
Microstructure and mechanical propertiesMetallurgy and Material FormingHigh-Velocity Impact and Material Behavior
Adam Zylbersztejn、N. F. Mott1975-06-01OpenAlex
The basic physical parameters which govern the metal-insulator transition in vanadium dioxide are determined through a review of the properties of this material. The major importance of the Hubbard intra-atomic correlation energy in determining the insulating phase, which was already evidenced by studies of the magnet…
Transition Metal Oxide NanomaterialsAdvanced Condensed Matter PhysicsCatalysis and Oxidation Reactions
L. M. Blinov1975-05-31Soviet Physics Uspekhi
This review gives information on the electric and optical properties of liquid crystals (LC), and discusses in detail various electro-optical effects in nematic, cholesteric, and smectic LC. Dielectric deformations of LC in electric fields, electrodynamic instabilities, the electromechanical effect, etc., are treated.…
Liquid Crystal Research AdvancementsPlant Reproductive BiologyMolecular spectroscopy and chirality
M. D. Rhodes1975-05-27OpenAlex
An experimental investigation of impact-initiated failures in high-strength graphite/epoxy and Kevlar-49/epoxy sandwich structures has been conducted. The tests consisted of firing small diameter aluminum projectiles with a velocity range of 16-67 meters/second (52-220 ft/sec) at preloaded sandwich specimens. These te…
Mechanical Behavior of CompositesHigh-Velocity Impact and Material BehaviorStructural Response to Dynamic Loads
John J. Ritsko、Daniel J. Sandman、A. J. Epstein 等 6 位作者1975-05-26Physical Review Letters
Plasmons in the one-dimensional organic metal tetrathiafulvalene-tetracyanoquinodimethane were directly measured by high-energy inelastic electron scattering in thin crystalline films at 300\ifmmode^\circ\else\textdegree\fi{}K. For plasmons propagating along the conducting $b$ axis the plasmon energy decreases from 0.…
Quantum and electron transport phenomenaMechanical and Optical ResonatorsOrganic and Molecular Conductors Research
S. G. Bishop、U. Strom、P. C. Taylor1975-05-26Physical Review Letters
Optically induced ESR and absorption due to localized paramagnetic states in the forbidden gap have been observed in several semiconducting chalcogenide glasses below \ensuremath{\sim}15 K. Analysis of the ESR spectra indicates that these centers are holes localized on chalcogens and are not directly associated with i…
Chalcogenide Semiconductor Thin FilmsPhase-change materials and chalcogenidesSolid-state spectroscopy and crystallography
Benjamin R. Anderson、L. J. Challis1975-05-21Journal of Physics C Solid State Physics
An analysis is given of the changes that occur in the thermal conductivity of a solid containing resonant phonon scattering centres when there are crossings or anticrossings of levels involved in the scattering. At a level crossing, the changes are due to interference between the scattering processes involving the two…
Thermal properties of materialsThermography and Photoacoustic TechniquesThermal Radiation and Cooling Technologies
J. P. Wolfe、W. L. Hansen、E. E. Häller 等 6 位作者1975-05-19Physical Review Letters
We present the first photograph of an electron-hole drop in germanium.Received 21 April 1975DOI:https://doi.org/10.1103/PhysRevLett.34.1292©1975 American Physical Society
Advanced Electron Microscopy Techniques and ApplicationsElectron and X-Ray Spectroscopy TechniquesPhotocathodes and Microchannel Plates
W. Brückner、W. C. Moldenhauer、Harry Wich 等 7 位作者1975-05-16physica status solidi (a)
The electrical resistivity (semiconductor–metal transition), the thermoelectric power, and the magnetic susceptibility of well-characterized VO2 monocrystals and powdered samples in the range of homogeneity were measured. The physical properties gave no hint of an extension of the range of homogeneity towards oxygen e…
Gas Sensing Nanomaterials and SensorsTransition Metal Oxide NanomaterialsGa2O3 and related materials
H. Köstlin、R. Jost、W. Lems1975-05-16physica status solidi (a)
Sn doped In2O3 films are electrically conductive and transparent in the visible range of the spectrum. Films with a plasma wavelength in the 1 μm region have been prepared by spraying a solution of InCl3 and SnCl4 onto a heated substrate. The free electron concentration is observed to increase with the Sn content up t…
ZnO doping and propertiesGas Sensing Nanomaterials and SensorsElectronic and Structural Properties of Oxides
G.M. Hood、R.J. Schultz1975-05-15Physical review. B, Solid state
Tracer diffusion of $^{64}\mathrm{Cu}$ in $\ensuremath{\alpha}\ensuremath{-}\mathrm{Z}\mathrm{r}$ single crystals has been measured in the temperature range (615-860)\ifmmode^\circ\else\textdegree\fi{}C. The temperature dependences of the $^{64}\mathrm{Cu}$ diffusion coefficients in directions parallel to and perpendi…
Microstructure and mechanical propertiesElectronic Packaging and Soldering TechnologiesHigh Temperature Alloys and Creep
Joseph Francis Sabatini、Arthur E. Salwin、Donald S. McClure1975-05-15Physical review. B, Solid state
Absorption bands in the region from 40 000 to 80 000 ${\mathrm{cm}}^{\ensuremath{-}1}$ have been found for the divalent ions of V, Cr, Mn, Fe, Co, and Ni in the host crystals KMg${\mathrm{F}}_{3}$, Ca${\mathrm{F}}_{2}$, and Mg${\mathrm{F}}_{2}$. Their spectral positions are near those of the free-ion $3d\ensuremath{\r…
Luminescence Properties of Advanced MaterialsCrystal Structures and PropertiesInorganic Fluorides and Related Compounds
Werner von der Ohe1975-05-15The Journal of Chemical Physics
The Raman spectrum of (TMA)2UCl6, not reported previously, is presented and the assignments of the observed bands to normal modes of vibration are discussed based on polarized room temperature scans of single crystals. Seventeen of the eighteen fundamental vibrational bands and seven nonfundamental ones are identified…
Luminescence Properties of Advanced MaterialsSolid-state spectroscopy and crystallographyInorganic Fluorides and Related Compounds
Joseph Allen Garber、A. V. Granato1975-05-15Physical review. B, Solid state
A theory analyzing the temperature dependence of second-order elastic constants on the basis of a quasiharmonic-anisotropic-continuum model is applied to LiBr, KCl, RbF, $\ensuremath{\beta}$-brass, Cu, Ag, and Au. The number of fourth-order elastic constants is reduced from 11 to 2 by assuming that nearest-neighbor (n…
Microstructure and mechanical propertiesHigh-pressure geophysics and materialsX-ray Diffraction in Crystallography
C. Calvo、R. Faggiani1975-05-15Canadian Journal of Chemistry
Ni 3 P 2 O 8 crystallizes in the monoclinic system with space group P2 1 /c with a = 5.830(2), b = 4.700(2), c = 10.107(4) Å, β = 91.22(2)°, and Z = 2. The structure was refined by full-matrix least squares methods to a final R value of 0.035 using 986 symmetry independent reflections. The structure is isotypic with t…
Crystal Structures and PropertiesChemical Synthesis and CharacterizationX-ray Diffraction in Crystallography
G. P. Johari、Sheila J. Jones1975-05-15The Journal of Chemical Physics
Thermally stimulated depolarization (TSD) current has been measured in polycrystalline H2O and D2O ice in the temperature range 77–260 K and at pressures of about 1 bar and 1.2 kbar. Three peaks in current have been observed at about 1 bar at a heating rate of 0.0023 K sec−1, the smallest of which appears at 110.4 K a…
Material Dynamics and PropertiesMagnetic and Electromagnetic EffectsFreezing and Crystallization Processes
W. J. Pardee、G. D. Mahan、D. E. East̀man 等 8 位作者1975-05-15Physical review. B, Solid state
The plasmon structure accompanying core-level x-ray photoemission in Na, Mg, and Al is reported and analyzed using a model of random spatial emission of extrinsic plasmons. The Mg and Al spectra are well fit by this model without intrinsic plasmon production. The Na data are not explained by purely extrinsic plasmon e…
X-ray Spectroscopy and Fluorescence AnalysisElectron and X-Ray Spectroscopy TechniquesSurface and Thin Film Phenomena
D. M. Kroll1975-05-15Physical review. B, Solid state
The dynamics of the switching process in amorphous semiconductors is analyzed using a previously described electrothermal model. Utilizing recent preswitching noise data as input, we calculate the switching delay time as a function of current in the low-overvoltage regime in the nucleation approximation. It is found t…
Material Dynamics and PropertiesThin-Film Transistor TechnologiesPhase-change materials and chalcogenides
D. W. Lynch、C. G. Olson、J. H. Weaver1975-05-15Physical review. B, Solid state
The absorptivity or reflectivity of polycrystalline samples of Ti, Zr, and Hf was measured from 0.15 to \ensuremath{\sim}30 eV. The data were Kramers-Kronig analyzed to determine the dielectric functions. Between \ensuremath{\sim}0.2 and \ensuremath{\sim}7 eV, each metal showed five structures in the absorptivity and…
Semiconductor materials and devicesElectron and X-Ray Spectroscopy TechniquesIntegrated Circuits and Semiconductor Failure Analysis