Phase equilibrium in a polarized saturated3He—4He mixture |
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Authors: | Alexandre Rodrigues Gerard Vermeulen |
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Affiliation: | (1) Centre de Recherches sur les Très Basses Températures, laboratoire assiocié à l’Université Joseph Fourier, CNRS, BP 166, Grenoble Cédex 9, France;(2) Present address: Departamento de Fisica, Universidade Federal de Pernambuco, Cidade Universitaria, 50670901 Recife, PE, Brasil |
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Abstract: | We present experimental results on the phase equilibrium of a saturated3He−4He mixture, which has been cooled to a temperature of 10–15 mK and polarized in a4He circulating dilution refrigerator to a stationary polarization of 15%, 7 times higher than the equilibrium polarization in the external field of 7 T. The pressure dependence of the polarization enhancement in the refrigerator shows that the molar susceptibilities of the concentrated and dilute phase of a saturared3He-4He mixture are equal atp=2.60±0.04 bar. This result affects the Fermi liquid parameters of the dilute phase. The osmotic pressure in the dilute phase has been measured as a function of the polarization of the coexisting concentrated phase up to 15%. We find that the osmotic pressure at low polarization (<7%) agrees well with thermodynamics using the new Fermi liquid parameters of the dilute phase. |
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