Magnetic order and moment distribution in doped spin-chain systems

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS

卷:272

Article

Eggert, Sebastian ; Affleck, Ian

关键词: spin chain;    antiferromagnetic order;    impurity;   

DOI  :  10.1016/j.jmmm.2003.12.1088

来源: Elsevier

【 摘 要 】

We consider the effect of doping on the magnetic order in quasi one-dimensional (1D) antiferromagnets. First the detailed magnetic response of finite spin-1/2 chains in the presence of a staggered field is determined, which by itself shows an interesting crossover as function of length and field strength. We can then understand the ordering by including an effective coupling between the chains, which results in a Neel-ordered phase at low temperatures, but with a broad distribution of magnetic moments that has to be determined self-consistently. (C) 2004 Elsevier B. V. All rights reserved.

【 授权许可】

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