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A short review is given on the present status of our knowledge on several transport properties, both in the normal and the superfluid phase in the vicinity of the superfluid transition. The concentration range extends from very dilute mixturesX (3He) ≈ 10−7 to those withX ≈X
= 0.67, whereX
A neutron scattering study of the hyperfine enhanced nuclear spin system Cs2NaHoCl6 has been carried out following adiabatic demagnetization cooling. The nuclear spin system was cooled to about 2 mK, belowT
=4.8 mK. We did not observe any antiferromagnetic diffraction peaks in the (1
As in crystalline materials, flux pinning in type II superconducting metallic glasses arises from the interaction of the flux-line lattice with defects that locally change the superconducting properties of the sample. The nature of these defects is still subject of numerous investigations. In...
A self-contained discussion is presented of the longitudinal (T
) and transverse (T
) relaxation rates in bulk and surface samples of spin-polarized atomic hydrogen (H↓), at sufficiently low temperatures that only the lowest two atomic hyperfine levels are thermally populated. The...
An analysis of the semicircular loop, vibrating-wire3He viscometer has been made. Emphasis was placed upon the magnetic field dependence of the resonance frequency and frequency width (damping) in order to study the suitability of the device for a field-independent thermometer. The analysis was...
The ground-state energy of solid hydrogen and deuterium is calculated by means of a modified variational lowest order constrained-variation (LOCV) method. Both fcc and hcp H2 and D2 are considered, and the calculations are done for five different two-body potentials. For solid H2 we obtain...
Low-temperature magnetostriction experiments have been performed on CeRu2Si2 single crystals in magnetic fields up to 15T. WhenH is applied parallel to the tetragonalc-axis, a very large expansion is observed in all lattice directions. A pronounced anomaly occurs at a field close to the...
First we develop the general theory of order parameter collective modes and their sound attenuation in dirty superconductors with even-parity pairing. For the BCS state the theory yields a peak in the attenuation of longitudinal ultrasound whose height is proportional to ωo[ηJ(s)]2 and whose...
Neutron diffraction experiments under pressure on the cubic heavy-fermion compounds CeIn3 and CePb3 are reported. Resistivity measurements were performed on CeIn3 in order to study the approach to the magnetic-nonmagnetic transition. Comparisons are made with previous results obtained on CeAl2....
Using two models for an anisotropic Coulomb pseudopotential parameter μ*(k), we have calculated approximate upper and lower limits for the anisotropic gap edge of superconducting aluminum as a function of wavevector direction over the Fermi surface. We consider all sources of anisotropy, i.e.,...
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