Liquid 3He thermomechanical effect in regular cylinders.
We have measured the normal liquid 3He thermomechanical effect with the liquid confined in the regular 210 nm diameter cylinders of Anopore. The pressure difference resulting from the temperature difference was deltaP/deltaT=25 Pa/mK, independent of temperature, from 0.7 to 12 mK. This value was 100x the theoretical value and 3x the result with a packed powder constriction. Two monolayers of 4He did not change the value, but four monolayers reduced it by 2 orders of magnitude; the high value was therefore attributed to boundary scattering from magnetic 3He surface layers.
Sawkey
Daren
D
Physics Department, Queen's University, Kingston ON K7L 3N6 Canada.
Harrison
J P
JP