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We report observations of an inhomogeneous state consisting of alternating superconducting and normal regions which occurs upon exceeding the critical current density in thin granular aluminum films. The results are in quantitative agreement with recent theoretical predictions, based on a model...
A method is described for calculating the surface impedance of thin superconducting films using the theory of Mattis and Bardeen of the surface impedance of superconductors. An approximate extension of the theory to the case where the superconducting order parameter inside the film varies slowly...
The temperature dependence of the resistivity over the range 1.8–20 K has been measured on the narrow-gap semiconductor SnTe with various Mn contents (<2.2at.%) and carrier concentrations [p = (1.2–8) × 1020 cm−3]. The resistivity shows an anomaly at some magnetic ordering temperature T
We calculate the fraction C
F of atoms in the ground state of liquid 4He for a fluid density of 0.023 atom/»3 at various values of temperature and find a good fit with the law CF(T)=CF(0)[1−(T/Tλ)3], where Tλ is the transition temperature; this law gives C
F = 2.3 % at T = 1.2 K, which agrees...
The propagation of 5-, 15-, and 25-MHz sound in superfluid 3He has been studied in zero magnetic field over a wide pressure range. Measurements of the structure and location of the attenuation peaks, velocity changes, and the low-temperature attenuation are described. The degree of strong...
The properties of pure 6He and 6He-4He and 6He-3He mixtures are studied within the context of the quantum theorem of corresponding states. For pure 6He, it is found that there is a small, but definite, region where it is expected to be superfluid. For the 6He-4He mixture, it is found that there...
Measurements are reported of the dielectric constant of 3He in the temperature range from 0.5 to 2.4 K and of 4He from 0.7 to 4.2 K. From these measurements the molar volumes of the two isotopes have been calculated for the same temperature ranges, using the polarizabilities reported by Kerr and...
We present measurements of the susceptibility of the A-15 structure systems NbyPt100−y−x
where M = Fe and Ru (y = 73–78). These measurements correlated with those of the critical temperature T
c permit us to conclude that there is a saturation of the effective number of magnetic impurity...
A theory is developed to explain the rather simple phenomenology of submonolayer adsorption on real solid surfaces in spite of the hazy situation characterizing the theoretical description of adsorption on ideal homogeneous surfaces. The situation is atypical: we cannot invoke the knowledge of...
We present measurements of the critical temperature T
c and the critical field H
c2 of the A-15 structure systems Nb
where M = Fe and Ru (y = 73–78). T
c is influenced by two effects: one due to the magnetic Fe atoms, which causes a strong decrease, and the other due to the...
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