1 - 10 of 11 articles
We present neutron scattering measurements of Bose-Einstein condensation (BEC) in liquid 4He confined in Vycor. The data show clear evidence of a condensate in Vycor with a condensate fraction comparable to that of bulk superfluid 4He, approximately 7.5% at low temperature and SVP. The...
The heat capacity of solid Kr-CH4 solutions with 30 and 60 mol.% CH4 has been studied at 0.8–20 K. The contribution of the rotational subsystem Crot to the heat capacity of the solutions is separated. The results obtained in this study and Ref. 4 were used to estimate the difference between the...
We have measured the contact angle of the interface of phase-separated
He mixtures against a sapphire window using an interferometric method in an optical cryostat. Our measurement has been performed at saturated vapor pressure, along the phase separation line and near Tt, the...
The peculiarities of low-temperature heat capacity of the KCl crystals containing randomly distributed OH− impurities have been studied using pulsed differential calorimetry. The contribution of the two level systems (TLS) and resonance modes to heat capacity was observed. At low concentration...
We measured critical temperature and critical magnetic fields of Nb/Pd multilayers where the Nb thickness is held constant (d
=250 Å) while the Pd thickness, d
, is systematically varied from 10 to 200 Å. The critical temperature shows a monotonic decrease as a function of the Pd...
The composition dependence of the superconducting critical temperature T
has been investigated for A15-type V3Ga compounds. The T
is determined by the specific heat and the magnetic flux transmission ratio through the sample and discussed in terms of the powder X-ray diffraction. The...
This paper considers the problem of finding simple analytical forms for the temperature dependence of thermodynamic and response functions within the weak coupling theory of clean BCS-like superconductors. In particular we derive interpolation formulae for the entropy, specific heat, and spin...
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