Abstract
We have measured the molar volume of a nearly saturated 3He-4He mixture, at temperatures below 100 mK and in magnetic fields to 16 T, by immersing capacitive dilatometers in the dilute phase of a top-loading dilution refrigerator. In zero magnetic field the coefficient of volume thermal expansion is negative and shows the linear temperature dependence expected of a Fermi liquid. Subject to experimental assumptions, we find the fractional increase in molar volume with magnetic field at 20 mK and 16 T to be about 0.01%.
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