Phys. Rev. Lett. 75, 3146–3149 (1995)Nature of Crossover between Ising-like and Mean-Field Critical Behavior in Fluids and Fluid MixturesReceived 2 June 1995; published in the issue dated 23 October 1995 An analysis of experimental data for the susceptibility of fluids and of liquid mixtures in the critical region has been performed to elucidate the character of the nonasymptotic critical behavior. While fluids and fluid mixtures exhibit an ultimate crossover to Ising-like asymptotic behavior, the effective susceptibility exponent γeff approaches the universal value γ≃1.24 either from above (A) or from below (B). We conclude that simple fluids belong to type B, whereas more complex systems may belong to type A and show a sharper nonmonotonic crossover from mean-field to Ising-like behavior. © 1995 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.75.3146
DOI:
10.1103/PhysRevLett.75.3146
PACS:
64.60.Fr, 05.70.Jk
See AlsoComment: C. Bagnuls and C. Bervillier, Comment on “Nature of Crossover between Ising-Like and Mean-Field Critical Behavior in Fluids and Fluid Mixtures”, Phys. Rev. Lett. 76, 4094 (1996). Reply: M. A. Anisimov, A. A. Povodyrev, V. D. Kulikov, and J. V. Sengers, Anisimov et al. Reply:, Phys. Rev. Lett. 76, 4095 (1996). |
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