Decoupled tetracritical points in quenched random alloys with competing anisotropies

Amnon Aharony, Shmuel Fishman

Research output: Contribution to journalReview articlepeer-review

75 Scopus citations


The phase diagram of a quenched random alloy of two components with competing anisotropies exhibits two critical lines, corresponding to ordering of only m1 (or m2) spin components. The two lines meet at a tetracritical point, where all m=m1+m2 components order simultaneously. General scaling arguments are used to show that the critical behavior at this point is decoupled, i.e., the m1- and m2-component subsystems have separate scaling free energies. Applications and experiments are briefly discussed.

Original languageEnglish
Pages (from-to)1587-1590
Number of pages4
JournalPhysical Review Letters
Issue number23
StatePublished - 1 Jan 1976
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (all)


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