1 - 10 of 18 articles
We continue the investigation of crystalline-field effects on the properties of superconductors containing rare-earth impurities. Attention is focused on impurities with a nonmagnetic ground state. We calculate the upper critical fieldH
and the jump of the specific heat at the phase...
Doppler-shifted cyclotron resonances (DSCR) have been observed with longitudinal and transverse acoustic waves propagating along the , , and  axes of pure aluminum crystals. One to three distinct series of resonance peaks have been observed in each field direction. The harmonic...
Ground-state energy of solid
He was computed by a Monte Carlo procedure in which the correlation parameter for nearest neighbor pairs was assigned different values from that for more distant pairs. This results in a ground-state energy which is lower by about 0.5 K than the value obtained with...
We show that attractive interaction between vortices occurs when Re(Λ−1)>ξ
for type-II superconductors with local or nonlocal magnetic effects, where [Re(1/Λ)]−1 and ξ0 are, respectively, the decay length of the magnetic field and the order parameter at arbitrary temperatures. The...
Several theoretical models have been put forward for the destruction of type-I superconductivity in a wire by the passage of a large enough current through it. In an attempt to discriminate between the various models, an experimental investigation has been carried out of the transition in one...
The dynamic structure function for
He density correlationsS
44(k, ω) is calculated as a function of the wave vectork and frequency ω for a simple model of a
He solution at various temperatures and small
He molar concentrationx. The inputs to the model include the measured
The superconducting to normal transition by a rectangular pulse current in type-II Ta has been investigated. The potential drop along the specimen is observed as a function of time. The voltage pattern and the magnitude of the potential drop are obtained as functions of current amplitude,...
After an introduction to the hydrodynamical properties of He II, a survey is given of the flow properties of superfluid helium in the film. Special attention is given to some unsolved problems, such as: has rotating He II (ω<ω
) a shrunken temperature-dependent parabolic meniscus and is a...
We present the results of phase separation under pressure in some dilute4He mixtures. The effect of pressure is to reduce the phase separation temperature for a given concentration. However, the general shape of all phase-separation curves seem to show that atT=0 K, no dilute
He solutions will...
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