Phase diagram and tricritical behavior of an Ising metamagnet model in a trimodal random field
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- 作者：A. Weizenmann ; Maurí ; cio Godoy ; A.S. de Arruda ; Douglas F. de Albuquerque ; N.O. Moreno
- 关键词：Monte Carlo ; Ising model ; Random field
- 刊名：Physica B
- 出版年：2007
- 出版时间：1 September 2007
- 年：2007
- 卷：398
- 期：2
- 页码：297-300
- 全文大小：160 K
文摘
The phase diagram of an Ising metamagnet in a random magnetic field is studied by using mean-field equations from Bogoliubov's variational principle. The trimodal probability distribution is applied. The phase diagram in the t–h plane presents continuous and first-order transition lines. The phase transition lines, together with the critical points, were obtained for several random field values.