EXPERIMENTAL PROPERTIES OF LIQUID HE3 NEAR ABSOLUTE ZERO

Measurements of the coefficients of spin diffusion, thermal conductivity, and viscosity of liquid He3 at very low temperatures and at pressures of 0.28 and 27.0 atm are discussed critically on the basis of a theory by Rice of transport in nearly ferromagnetic Fermi liquids. It is found that the temperature dependence of the thermal-conductivity coefficient is qualitatively similar to that predicted by Rice. However, neither the spin-diffusion coefficient nor the viscosity coefficient, as determined from ultrasonic attenuation measurements, is known precisely enough to give a good test of the Rice theory in the low-temperature limit. It is suggested on the basis of qualitative data that the anomalously low thermal boundary resistance between cerium magnesium nitrate and pure He3 may result from the nearly persistent spin-fluctuation phenomenon. © 1968 The American Physical Society.