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Comparison of the measured microwave response in the presence of a dc current in narrow films of tin nearT
with the results from microscopic theory shows good agreement. Nonequilibrium effects become important when the frequency ω becomes of the order of the inverse inelastic relaxation time...
The variation of the electrical resistanceR of EuMo6S8 with temperatureT and applied magnetic fieldH was determined at pressuresP to 19 kbar. At ambient pressure, the results are in agreement with previous work on samples of similar quality, where it was determined that variations of the carrier...
Large diamagnetic transitions along with sharp resistive transitions were observed in the La-Sr-Nb-O system near room temperature (∼290 K). The amplitude of the diamagnetism reaches 35% of that of a pure Nb sheet. In addition, a behavior similar to weak magnetic spin ordering was observed for...
The thermal expansion and magnetostriction of single crystals of normal and ferromagnetic dense Kondo systems CeSi1.86 and CeSi1.70 are measured. The results show very characteristic behavior. The strain-dependent Kondo effect supports the Γ7-like ground doublet conjectured previously based on...
At temperatures below 1 mK the rf power in pulsed NMR experiments is normally kept as low as possible in order to minimize eddy current heating in the metallic samples used for thermometry. However, for metallic samples with short Korringa constants a temperature dependence enters via the...
The Einstein relation is studied for the diffusivity-mobility ratio of the carriers in ultrathin films of bismuth in the presence of crossed electric and magnetic fields at very low temperatures, and the numerical results are presented for McClure and Choi, hybrid, Cohen, Lax, and ellipsoidal...
We have measured the low-temperature specific heat (1.3≤T≤20 K) and the dc magnetic susceptibility (100≤T≤250 K) of eight samples of the high-T
Cu3O7−δ (x=0.9, 1.0, 1.1) and of two samples of nonsuperconducting YBa2Cu3O6+δ. We have also performed specific heat...
We have calculated bounds on thermodynamic properties that apply to any superconductor which can be described by the isotropic Eliashberg equations. The boson exchange mechanism giving rise to the attractive kernel is not specified and its size and shape are varied arbitrarily. We consider the...
The anisotropy of the upper critical field has been measured on deoxygenated single crystals of the Chevrel-phase Cu1.8Mo6S8. Data were taken with the applied magnetic field pointing in various directions in the hexagonal
$$(2\overline 1 0)$$
and (001) planes. The data reflect the...
Magnetoconductance and excess conductance due to superconducting fluctuations in aluminum films are measured in order to study the temperature dependence of the pair-breaking parameter δ at temperatures nearT
. The parameter δ
is estimated from the relation δ=πℏ/8k
Tτin, where τin is the...
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