Abstract
We study the annealed site-diluted versions of the classical O(n) Heisenberg ferromagnets. It is shown that if the temperature is low enough, then at some value of the chemical potential there is phase coexistence between a magnetized, high-density state (liquid-crystal state) and a low-density state (gaseous state) with no magnetic order.
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Chayes, L., Shlosman, S.B. & Zagrebnov, V.A. Discontinuity of the Magnetization in Diluted O(n)-Models. Journal of Statistical Physics 98, 537–549 (2000). https://doi.org/10.1023/A:1018659005327
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DOI: https://doi.org/10.1023/A:1018659005327