PHASE-DIAGRAMS FOR 2-DIMENSIONAL AND 3-DIMENSIONAL ISING-MODELS WITH FLUCTUATING EXCHANGE INTEGRALS

被引：15

作者：

BOBAK, A

JASCUR, M

机构：

[1] Dept. of Theor. Phys. and Geophys., Fac. of Natural Sci., P J Safarik Univ., Kosice

来源：

JOURNAL OF PHYSICS-CONDENSED MATTER | 1990年 / 2卷 / 50期

关键词：

D O I：

10.1088/0953-8984/2/50/010

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The Ising ferromagnet with fluctuating exchange integrals has been investigated using the two-spin cluster approximation. The phase diagrams were obtained for both two-and three-dimensional systems. They show a re-entrant behaviour only for a square lattice. It is argued that this behaviour is expected in disordered systems where one has competition between ferromagnetic and antiferromagnetic interactions in a certain range of the concentration of the bond mixture.

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页码：10053 / 10058

页数：6

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