1 - 10 of 13 articles
Measurements of the magnetic specific heat of a complex of cerium (III) iodide and antipyrine and of a complex of cerium (III) thiocyanate and triphenyl phosphine oxide indicate that both materials should produce lower limiting temperatures than cerium magnesium nitrate.
The problem of3He mobility in dilute3He-4He solid mixtures has been treated both theoretically and experimentally. The Hamiltonian of the system can be reduced to the Hamiltonian of strongly interacting impurity quasiparticles corresponding to some time-averaged states. The experiments carried...
High-resolution measurements of the sound velocity in 20 crystals of bcc3He at constant molar volume (24.1 cm3/mole) show a monotonic decrease of about 0.1% for longitudinal and 0.3% for transverse velocities for a temperature increase from 0.123 to 0.800 K, the change being approximately...
The thermodynamic properties of a model frequently used to study spin-phonon interactions in a paramagnetic system is investigated in a self-consistent manner using a variational principle for the free energy. A set of coupled nonlinear integral equations is obtained. Nonuniform ordering is...
Precise measurements of the depolarization properties and intensity of laser light Raman-scattered from roton pairs in liquid
He are described and compared with several existing theories.
Sensitive vapor pressure (P
sat) measurements of
He mixtures by means of a low-temperature strain gauge are described over the temperature range 0.5–1.5 K and the range 0.4
TheT*-T relation for powdered chromium-potassium alum was determined by calibration with a CMN thermometer. The result was considerably different from the hitherto reported ones but was highly reproducible. The obtained relation is expressed in the region ofT=600−30 mK as a linear...
The de Haas-van Alphen effect has been measured in the ordered alloy β′-AgZn by the modulation method, improving and extending the results of earlier observations. The results are in good agreement with recent theoretical calculations of the Fermi surface, although some of the predicted orbits...
The temperature dependence of superconducting tin, thin-film, narrow bridges has been investigated. NearT
the critical current varies with (1 − T/Tc
α), with a distribution of α values between 1 and 3/2. It is suggested that the α values can be used to characterize the bridges. The microwave...
The transfer rate of helium film was measured in a container with typical dimensions of 1 cm. The film flow was induced thermally. Superimposed to the film flow was a rotation of the container. If a velocity difference between substrate and superfluid component were possible, the critical film...
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