Polycritical points and floplike displacive transitions in perovskites

Amnon Aharony, Alastair D. Bruce

Research output: Contribution to journalArticlepeer-review


The critical behavior occurring at displacive phase transitions in anisotropically stressed perovskite crystals is examined. It is shown that, under various conditions, the asymptotic critical behavior may be of Ising, XY-model, or Heisenberg type. The existence of a "spin-flop"-like transition (at zero stress) between two differently ordered phases is predicted. An explanation of the discrepancy between the measured exponents and those predicted theoretically is proposed, and several new experiments are suggested.

Original languageEnglish
Pages (from-to)427-430
Number of pages4
JournalPhysical Review Letters
Issue number7
StatePublished - 1974
Externally publishedYes


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