1 - 10 of 11 articles
Hysteresis of critcal currentsI
of superconducting bridges with In, Nb, and NbN has been studied in low perpendicular magnetic fields. Influences of bridge geometry, small field sweep, trapped flux, and bombardment of argon ions on the hysteresis were made clear. The experimental results...
Using the generalized time-dependent Ginzburg-Landau equations for dirty superconductors in local equilibrium, we determine the stability limits of the homogeneous superconducting state in high-frequency, current-carrying filaments. For weak pair-breaking by inelastic scattering, the instability...
The maximum pinning force of a two-dimensional vortex lattice in a random potential is calculated. A connection is established between this threshold pinning force and the potential energy discontinuities due to elastic and plastic instabilities of the vortex lattice. Inspired by recent computer...
Superfluid films adsorbed on a cylindrical surface are studied. The superfluid density is calculated using a modification of the Kosterlitz-Thouless theory. There is no vortex unbinding transition because the vortex interaction is linear on long length scales. Thus the superfluid areal density,...
We present a variational microscopic study of the liquid4He with one3He impurity at zero temperature, within the framework of the average correlation approximation. In this approach all calculations can be referred to quantities of liquid4He. The chemical potentials of liquid4He and of a3He...
Measurements of critical currents using a four-point direct current (dc) method and an alternating magnetic field method have been performed on several superconducting YBa2Cu3O7 ceramics at 77 K. In the presence of a constant magnetic field, the critical currents obtained with the alternating...
This paper determines the fundamental thermodynamic potential of the healing and relaxation theory for helium II developed in previous papers in this series. The potential is founded on experimental data drawn from a variety of sources, e.g., neutron scattering, calorimetry,etc. This energy...
The curvature factor, C=|∂2 A/∂K
|−1/2, appearing in the expression of the amplitude of the de Haas-van Alphen effect oscillation has been computed for the cubic harmonic description of the Fermi surface. Its values have been determined over a wide range of orientation of the gamma-centered...
Core structures of nontopological solitons between inequivalent vacua in superfluid3He-A are considered. We analyze the symmetries of these A-A interfaces, and compute their hard-core structures in the Ginzburg-Landau regime. We discuss both domain walls where the orbital anisotropy l-vector is...
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