Phase equilibrium in a polarized saturated {sup 3}He-{sup 4}He mixture
- 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, Vol. 108, Issue 1-2; Other Information: PBD: Jul 1997
- Country of Publication:
- United States
- Language:
- English
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