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Thermodynamics Near the Two-Fluid Critical Mixing Point in He-3 - He-4

Mar 30, 1970
2 pages
Published in:
  • Phys.Rev.Lett. 24 (1970) 715-717
DOI:
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Abstract: (APS)
The two-fluid critical mixing point in He3 - He4 differs from ordinary critical points in that it occurs at the intersection of three lines of critical points, in a suitable variable space. A free-energy function is proposed which removes certain discrepancies between classical (Landau) theory and experimental thermodynamic measurements. Certain solid-state transitions (e.g., the metamagnetic-antiferromagnetic transition in FeCl2) are thermodynamic analogs of critical mixing in He3 - He4.