The magnetization, M, of dilute Ising ferromagnets with quenched random fields is shown to have accumulation points of poles in each of these fields hi(at hi → 0) and in the external uniform field H (at H → -hi). This occurs for all temperatures for which the nonrandom (zero-field) system has H ≠ 0. If both hi and -hi are possible then M is probably nonanalyti c for many values of hi. This casts doubts on expansions in the random fields.
|Number of pages||4|
|Journal||Physics Letters, Section A: General, Atomic and Solid State Physics|
|State||Published - 3 Dec 1984|