NDLI: 4He in Liquid 3He below 0.1 K: Measurements of the Solubility and Prewetting Transition

Content Provider	Springer Nature Link
Author	He, J. Culman, T. G. Hjort, H. H. Edwards, D. O.
Copyright Year	2000
Abstract	We have measured the solubility of $^{4}$He in liquid $^{3}$He down to ∼0.04 K at various pressures. The solubility was obtained indirectly, from the thickness of the superfluid film in contact with unsaturated solutions. We determined the film thickness from the ratio of two parallel plate capacitors with different gaps, immersed in the unsaturated liquid. The technique is described in detail, with its advantages and drawbacks, including the effects of the edge capacitance and capillary condensation. For use in interpreting the data, the adsorption area and the van der Waals potential of the cell walls were found by measuring the thickness of $^{3}$He and $^{4}$He–$^{3}$He films under their vapor pressure. By fitting the temperature dependence of the solubility to the predictions of Fermi liquid theory, we determined the $^{4}$He effective mass m$_{4}$, the binding energy E $_{4}$ and the partial volume v$_{4}$, as a function of pressure. At 24 atm, a prewetting transition was observed in the $^{4}$He-rich film in contact with the liquid $^{3}$He. The transition, which is related to a similar phenomenon discovered by Tholen and Parpia at very low temperature, is explained by a simple model. An Appendix describes a new derivation of the thermodynamic functions of $^{3}$He-rich mixtures in Fermi liquid theory.
Starting Page	533
Ending Page	588
Page Count	56
File Format	PDF
ISSN	00222291
Journal	Journal of Low Temperature Physics
Volume Number	119
Issue Number	5-6
e-ISSN	15737357
Language	English
Publisher	Kluwer Academic Publishers-Plenum Publishers
Publisher Date	2000-01-01
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Characterization and Evaluation Materials Condensed Matter Magnetism, Magnetic Materials
Content Type	Text
Resource Type	Article
Subject	Atomic and Molecular Physics, and Optics Condensed Matter Physics Materials Science

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