1 - 8 of 8 articles
We have developed a simple superconducting thin film device that can be used as either a thermometer or a thermal conductivity sensor. Over a narrow range the device has somewhat better temperature resolution than a conventional germanium thermometer, but its main advantage is that it has very...
We study the temperature-equilibration process of fluids at constant volume in a thermal conductivity cell, where an initial temperature gradient relaxes to zero. The calculation is performed in the linear approximation for a pure fluid and a binary mixture. Near the critical point of the pure...
The response of a layer of superfluid mixture to an ac heat source,Q(t)=Q
exp(iωt), is determined. In the low-frequency regime, the temperature response at the heated side of a superfluid layer is essentially identical to that of an ordinary fluid having a thermal conductivity κeff and a...
We present the results of a study of the influence of the configurational relaxation of an orthosubsystem of solid hydrogen on its thermal conductivity at temperatures of 1.5–3 K and orthoconcentrations of 0.005–0.044. The analysis includes both corrections to the initial ortho concentration and...
The properties of liquid helium-4 are investigated in a mean-field approximation using a finite-range effective interaction. The long-range part (i.e.,r>2.556 Å) coincides with the standard Lennard-Jones potential and the hard core is phenomenologically renormalized. The model reproduces the...
We present calculations of the thermal conductivity, viscosity, and longitudinal spin diffusion of degenerate3He-4He mixtures as a function of spin polarization. Physical arguments and sum rules are used to describe qualitatively the behavior of the effective interactions between two3He...
Studies of the dHvA effect have been made on NbO single crystals grown by a zone melting techniques and 13 separate frequency branches ranging from 5.2×106 G to 1.2×108G have been observed. To understand the origin of the dHvA frequencies, we have made a self-consistent band structure...
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