3,050 Result(s)
within
Physics
Characterization and Evaluation of Materials
Qi** Li
Article
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Article
Magnetic breakdown in zinc
The magnetic breakdown field between the second and third zones in zinc has been determined from measurements of the absolute amplitude of the de Haas-van Alphen oscillations of the needles by a torque method....
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The influence of scattering on magnetic breakdown
A study of magnetic breakdown between the third zone needles and second zone monster surfaces in the three zinc alloy systemsZnMn,ZnCr, andZnFe shows that the tunneling probability is strongly reduced by electron...
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One-dimensional ionic conduction in solid Ag2 Tl6I10
The ionic and electronic conductivities of Ag2Tl6I10 single crystals have been studied as a function of crystallographic orientation and temperature from 20 to 135°C. EMF as well as AC and DC techniques have been...
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An investigation of the Al2O3-CdSe interface in accumulation
The Al2O3−CdSe interface of a thin-film transistor is investigated in the frequency range 30 Hz-30 kHz under weak depletion and accumulation. The surface states are, most likely, located in the insulator Al2O3 wi...
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Investigations of electric dipole fields in type II superconductors during flux flow
Electric dipole fields in the mixed state of rectangular superconducting foils are investigated both theoretically and experimentally. These fields are generated by imposing an ac current to a contact pair dur...
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Preparation and analysis of high-T c Nb-Ge films
The dependence of Tc on sputtering conditions, chemical composition, and phase structure for Nb-Ge films has been studied. It was found that Tc varied with composition, but was not dependent on exact stoichiometr...
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On combined self-phase modulation and stimulated Raman scattering in optical fibres
A theory on combined self-phase modulation (SPM) and stimulated Raman scattering (SRS) in optical fibres is given. The theory shows that Raman frequency conversion is not affected by SPM, and the phase shifts ...
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X-ray studies of dislocations in multi-layer Cu films
Vacuum-prepared multi-layer Cu films have been studied by x-ray diffraction to detect the averaged dislocation density and distribution. There are very few stacking faults and a very small degree of texture in...
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Frequency-doubling PFM system to prolong the distance of optical fibre TV programme transmission
In the square-wave PFM system for transmission of TV programmes through optical fibres, square-wave PFM pulses are generated at the transmitter with a relatively low centre frequency, whereas double-frequency ...
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Orientational ordering in solid D2 from NMR studies. II. The cubic ordered phase
An NMR study in the cubic phase of D2 which exhibits long-range orientational order is reported. The spin systems in both para D2 (with angular momentum J=1 and spinI=1) and in ortho D2 (with J=0 andI=2) were inv...
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Orientational ordering in solid D2 from NMR studies. I. The hcp phase
Using a coherent pulsed NMR spectrometer operating at 5.9 MHz, measurements have been made of the free induction decay and of the solid echo in hcp solid D2. From these data, and using Fourier transform technique...
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Computer simulations for a common-cavity two section (CCTS) bistable laser
In this paper a computer simulation about the characteristics of steady-state and transient response for a CCTS bistable laser under inhomogeneous electrical injection or external optical injection is reported...
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Amorphization in Fe-Cu system by tracing its microscopic features
Strong evidence that amorphization was achieved by ion-beam mixing in a Fe-Cu system that has a large positive heat of formation (+19kJ/mole) is reported. The composition of the films, Fe70Cu30, was chosen accord...
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NMR studies of a D2 single crystal in the ordered phase
We report the first experimental study of the NMR lineshape anisotropy in the orientationally ordered cubic phase of a D2 single crystal. The para-D2 concentration covered the range 0.72<X<0.82. The observed line...
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Polysilicon dry etching by a large-area electron beam
Dry etching using a novel large-area electron beam has been obtained on polysilicon over SiO2/Si samples in the pressure range 0.1–0.4 Torr. The dependence of etching rate upon electron-beam power density, total ...
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Dispersion of V2O5 supported on a TiO2 by x-ray photoelectron spectroscopy surface
The dispersion of V2O5 in V2O5/TiO2 catalysis has been studied by x-ray photoelectron spectroscopy, transmission electron microscopy and a thermal gravimetric analysis for samples with various V2O5 content. The c...
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Flux pinning in superconducting amorphous Zr1−x Co x
The pinning force FP in amorphous Zr1−x Co x (x=0.30; 0.35) is measured as a function of perpendicular field and temperature. The homogeneous samples exhibit a weak flux pinning...
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Upper critical fields of single-crystalline and polycrystalline Ca-Sr-Bi-Cu-O compounds
The ac resistivity of a “110 K phase” multiphase polycrystalline Ca-Sr-Bi-Cu-O compound and an “85 K phase” single-crystalline Ca0.9Sr2.1Cu2.0O8 + δ has been measured in various magnetic fields up to 8 T. Values ...
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Weak links in the superconducting transition of multiphase Bi-Ca-Sr-Cu-O compounds
The ac resistivities and dc V-I characteristics have been studied in a multiphase Bi-Ca-Sr-Cu-O sample in the temperature region where the transition from the normal to the superconducting state takes place. T...
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Bolometric observation of nonradiative decay of surface plasmons in silver
A bolometric technique was used to observe the nonradiative decay of surface plasmons in a silver film. This technique allowed us to separate the radiative and nonradiative relaxations of the plasmons and to d...
