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arXiv 0905.1176cond-mat.mtrl-sci
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铁磁性铁掺杂ZnO纳米团簇的制备

The making of ferromagnetic Fe doped ZnO nano-clusters

Nirmal Ganguli, Indra Dasgupta, Biplab Sanyal

摘要:

本文采用从头算密度泛函方法研究了Fe掺杂ZnO团簇的能量和磁相互作用。结果表明,在适当的条件下,缺陷可以诱导掺杂Fe原子之间的铁磁相互作用,而反铁磁耦合占主导地位的中性无缺陷的集群。计算还揭示了一个不寻常的离子状态的掺杂剂Fe原子驻留在集群的表面,一个功能,这是重要的,使集群铁磁性。

英文摘要:

In this letter, the authors present a study of the energetics and magnetic interactions in Fe doped ZnO clusters by ab-initio density functional calculations. The results indicate that defects under suitable conditions can induce ferromagnetic interactions between the dopant Fe atoms whereas antiferromagnetic coupling dominates in a neutral defect-free cluster. The calculations also reveal an unusual ionic state of the dopant Fe atom residing at the surface of the cluster, a feature that is important to render the cluster ferromagnetic.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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