Abstract
Simulating an Ising model, up to sizes 150×150×150 in three and 225×225 in two dimensions, in a random field of strength ±H, we find a magnetization slowly decreasing with time if initially all spins are parallel. This decay is extremely slow for small random fields, so that a stable magnetization cannot be excluded. Below some "freezing" temperature, the system remains a single domain, with a finite magnetization in both two and three dimensions. If instead the system is cooled down in a constant random field, from temperatures above to temperatures below this freezing transition, then at the lower temperature the magnetization increases with time; this increase is very slow for large systems, with similar results in two and three dimensions.
Original language | English |
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Pages (from-to) | 325-333 |
Number of pages | 9 |
Journal | Zeitschrift für Physik B Condensed Matter |
Volume | 55 |
Issue number | 4 |
DOIs | |
State | Published - 1 Dec 1984 |
Externally published | Yes |
ASJC Scopus subject areas
- Condensed Matter Physics