Thermal Expansion of a Dilute 3He-4He Mixture
MetadataShow full item record
Using a titanium capacitive dilatometer, originally designed to measure the thermal expansion of solids as a standard capacitor, we measured the dielectric constant, molar volume, and thermal expansion of the liquid <sup>3</sup>He-<sup>4</sup>He mixture in the dilute phase of a dilution refrigerator from about 15 mK to 800 mK. The thermal expansion is negative over the full temperature range. A minimum in the thermal expansion near 100 mK may be associated with the onset of Fermi-liquid behavior for the <sup>3</sup>He component of the mixture.