An Extended Mean Field Model for Spin Glasses: Antiferromagnetic-Spin Glass Systems : Condensed Matter and Statistical Physics
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概要
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An extended mean field model, which describes coupled spin glass (SG) systems, is introduced and applied to antiferromagnetic (AF)-SG systems. It is an extended model of a simple AF-SG system examined recently by Fyodorov et al. In the sense that intra-sublattice interactions of a Sherrington-Kirkpatrick type are also taken into account. It is shown that the present AF-SG model reproduces at least qualitatively many interesting aspects such as the reentrant transitions under external fields which are observed in the recent experiments on the Ising AF-SG systems Fe_xMn<1-x> TiO_3 and Fe_xMg_<1-x>Cl_2.
- 理論物理学刊行会の論文
- 1988-11-25
著者
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Takayama H
Univ. Tokyo Kashiwa Jpn
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TAKAYAMA Hajime
Research Institute for Fundamental Physics, Kyoto University
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