1 - 10 of 16 articles
The results of a theoretical study of the upper critical fields of layered superconducting compounds are presented. It is found that for sufficiently decoupled layers the parallel critical fieldsH
can be quite large compared to those expected with ordinary type II superconductors and...
An improved self-consistent phonon theory (ISC) including three- and four-phonon processes has been used to calculate the zero-pressure lattice parameters and the zero-pressure thermal expansion for Kr. The results indicate that, however limited ISC theory with three-phonon processes may be,...
The propagation of zero sound in the superfluid state of the type suggested by Balian and Werthamer is studied theoretically. In the collisionless limit the attenuation of zero sound takes place only for ω≥2Δ(T) and at ω=2(3/5)1/2Δ(T), where ω is the frequency of the sound wave and Δ(T) is the...
The spectrum of optical electrodipolar absorption of antiferromagnetic RbMnF3 in the region of the
G) transition has been studied experimentally in strong magnetic fields (up to300 kOe) and at the external uniaxial pressure. Employing the parameters of...
Superfluid states in a rotating elliptic cylinder are studied with semiclassical hydrodynamics. Two distinct approaches are used to obtain the critical angular velocity for the appearance of a vortex: (1) Equilibrium thermodynamics predicts that ω
increases monotonically with deformation at...
The superconducting critical fieldsH
and the critical temperaturesT
have been measured down to 0.05 K in a series of dilute alloys ofMo
Mn. These systems haveT
of 50, 0.3, and 15, respectively, whereT
is the Kondo temperature of the alloy andT
The conditions necessary for the formation of Nb
Ge by low-pressure rf sputtering with a superconducting transition temperatureT
>21 K have been investigated. Samples have been deposited onto cooled substrates so that the film is first amorphous and then is crystallized by a subsequent...
The use of the superconducting proximity effect to eliminate supercooling in a type I superconductor is reported. This effect has been demonstrated to be completely successful when applied to a tungsten specimen. It has also been employed to firmly establish new low upper bounds on the possible...
Measurements have been made of the viscosity of pure liquid
He at the saturated vapor pressure over the temperature range 20 mK to 1 K, by observation of the decay of torsional oscillations of a crystalline quartz cylinder. The results generally confirm previous measurements by other methods,...
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