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The specific heats of the hexagonal structures H(NbIrO) and R(NbPtO) have been measured from1.2 to15 K. The R-phase compound is found to be superconducting withT
=3.8 K. The reduction inT
from10.1 to3.8 K between the two phases is qualitatively accounted for by corresponding reductions in...
The total pinning force in type II superconductors with randomly distributed pinning centers is determined, assuming a static, friction-type force characterizing the vortex-pinning interaction. The resulting total pinning force does not show a threshold criterion and describes the experimental...
Third-sound velocities and superfluid onsets have been studied for4He films adsorbed on pyrolytic graphite. The present onset data are compared with previous experiments on graphite substrates. The third-sound onset data are found to be significantly different from superfluid mass-flow and...
We have studied the properties of a hole tunneling in an alternate lattice of fermions weakly coupled by antiferromagnetic exchange. This model is applied to vacancies in solid3He, which has features in common with a Mott semiconductor. The vacancy induces a ferromagnetic polarization over a...
Measurements have been made of the magnetic susceptibility of samples of superconducting granular aluminum with different metal volume fractions. The penetration depth, determined from the results below the transition temperatureT
, is found to diverge at the volume fraction where the...
The recovery motion of the magnetization and the associated motion of the order parameter for the pulsed NMR geometry in superfluid3He-B are investigated by solving the Brinkman equations including the Leggett-Takagi spin relaxation effect. It is found that the relaxation of longitudinal...
Using the exact solution of theSU(2) Thirring model, we derive an infinite set of coupled nonlinear integral equations describing the thermodynamic properties of a one-dimensional Fermi gas at a given temperature and magnetic field. The limiting case ofT=0 is considered, in which the magnetic...
A theory of the stationary response of a flux-controlled superconducting weak link is presented in the framework of reversible thermodynamics. The superconducting loop containing the weak link (SQUID)—considered as a “black box”—can be characterized by a nonlinear inductance ℒ
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