Phase equilibrium in a polarized saturated {sup 3}He-{sup 4}He mixture

Journal Article · Tue Jul 01 04:00:00 EDT 1997 · Journal of Low Temperature Physics

DOI:https://doi.org/10.1007/BF02396818· OSTI ID:569755

Rodrigues, A; Vermeulen, G ^[1]

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1. Universite Joseph Fourier, Grenoble (France)

We present experimental results on the phase equilibrium of a saturated {sup 3}He-{sup 4}He mixture, which has been cooled to a temperature of 10-15 mK and polarized in a {sup 4}He 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 saturated {sup 3}He-{sup 4}He mixture are equal at p = 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.

• Sponsoring Organization: USDOE
• OSTI ID: 569755
• Journal Information: Journal of Low Temperature Physics, Journal Name: Journal of Low Temperature Physics Journal Issue: 1-2 Vol. 108; ISSN JLTPAC; ISSN 0022-2291
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
66 PHYSICS
FERMI LEVEL
HELIUM 3
HELIUM 4
MAGNETIC FIELDS
MIXTURES
PHASE STABILITY
PRESSURE DEPENDENCE
SUPERFLUIDITY
TEMPERATURE DEPENDENCE