Magnetic structure and phase diagram in a spin-chain system:: Ca3Co2O6

被引：28

作者：

Kudasov, Y. B. ^{[1
]}

机构：

[1] VNIIEF, Russian Fed Nucl Ctr, Sarov 607188, Russia

来源：

EPL | 2007年 / 78卷 / 05期

关键词：

D O I：

10.1209/0295-5075/78/57005

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A transformation of the low-temperature magnetic structure governed by the 2D Ising model to the high-temperature honeycomb structure in the frustrated spin-chain compound Ca3Co2O6 is investigated. It is shown that the crossover between the two magnetic structures at 12 K arises from the entropy accumulated in the disordered chains. This interpretation is in an agreement with the experimental data. General rules for the phase diagram of frustrated Ising chain compounds are formulated.

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