Abstract
The global phase diagram of the Blume-Capel model in a random field obeying the bimodal symmetric distribution is determined by using the mean-field method. The phase diagram includes an isolated ordered critical end point and two lines of tricritical points. A new phase emerges for strong enough random fields: the ferromagnetic-nonmagnetic phase. It is argued that such a phase occurs in three dimensions.
- Received 27 February 1990
DOI:https://doi.org/10.1103/PhysRevB.42.2378
©1990 American Physical Society
