Crossover effects in weakly diluted n2 Ising antiferromagnets

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Abstract

Fernández [Phys. Rev. B 38, 6901 (1988)] showed that weak dilution of n2 Ising antiferromagnets generates random anisotropies. It is shown that the corresponding crossover exponent is φ=2φa-2+α, where φa is the crossover exponent for the nonrandom uniaxial anisotropy and α is the specific-heat exponent. Fernández's Monte Carlo results for n=2 in two dimensions indicate that in this special case φaγ and φγ-2β. However, the latter result is generally incorrect.

Original languageEnglish
Pages (from-to)423-424
Number of pages2
JournalPhysical Review B
Volume44
Issue number1
DOIs
StatePublished - 1 Jan 1991
Externally publishedYes

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