Thermal conductivity of low-density weak solid solutions of He3 in He4
A. A. GolubPhysicotechnical Institute of Low Temperatures, Academy of Sciences of the Ukrainian SSR, Khar’kovS. V. SvatkoPhysicotechnical Institute of Low Temperatures, Academy of Sciences of the Ukrainian SSR, Khar’kov
ABI
Abstract
Crystals of helium isotopes in solid solution, with 0.05, 0.15, and 0.5 at. % He3 concentrations, respectively, have been grown under a constant pressure of 31.1 atm and their thermal conductivity then measured over the 0.4−1.8 °K temperature range. In an analysis of the results, a component of the thermal resistence has been isolated which is proportional to T−2 and corresponds to the mechanism of phonon scattering by stress fields around dislocations. The possibility is considered that the impurity component of thermal resistance could be weakly anisotropic.
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