Nature of crossover between ising-like and mean-field critical behavior in fluids and fluid mixtures
- Institute for Physical Science and Technology and Department of Chemical Engineering, University of Maryland, College Park, Maryland 20742 (United States)
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 {gamma}{sub eff} approaches the universal value {gamma}{congruent}1.24 either from {ital above} ({ital A}) or from {ital below} ({ital B}). We conclude that simple fluids belong to type {ital B}, whereas more complex systems may belong to type {ital A} and show a sharper nonmonotonic crossover from mean-field to Ising-like behavior. {copyright} {ital 1995} {ital The} {ital American} {ital Physical} {ital Society}.
- DOE Contract Number:
- FG02-95ER14509
- OSTI ID:
- 124839
- Journal Information:
- Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 17 Vol. 75; ISSN 0031-9007; ISSN PRLTAO
- Country of Publication:
- United States
- Language:
- English
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