Journal
PHYSICS AND CHEMISTRY OF LIQUIDS
Volume 47, Issue 6, Pages 693-697Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/00319100903079154
Keywords
critical-point effects; critical exponents; crossover; Ising model; criticality; magnetic equation of state
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Motivation for this Letter comes from two experiments. The first, by Kim and Chan (Phys. Rev. Lett. 53, 170 (1984)), measured a two-dimensional (2D) liquid-vapour critical point exponent. The second studied, via the magnetism of ultrathin metal films, the crossover of the critical exponent beta from 2D to 3D. Here, the analogy between magnetic behaviour near criticality and the corresponding liquid-vapour behaviour is first used to discuss the 2D-3D crossover in the latter case. Finally, the experimentally observed magnetic behaviour near criticality is considered for the ferromagnet CrBr3 to allow fingerprints of the 3D Ising Hamiltonian to be anticipated.
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