Defect-induced room temperature ferromagnetism in Fe and Na co-doped ZnO nanoparticles
Defect-induced room temperature ferromagnetism in Fe and Na co-doped ZnO nanoparticles
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Fe 和 Na 共掺杂 ZnO 纳米颗粒中缺陷诱导的室温铁磁性
DOI：
10.1016/j.jallcom.2012.01.043
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发表时间：
2012-04-25
影响因子：
6.2
通讯作者：
Yan, Mi
中科院分区：
文献类型：
--
作者：
Gu, Hao;Jiang, Yinzhu;Yan, Mi
研究了Fe和Na共掺杂ZnO纳米粒子对稀释磁性半导体（DMS）缺陷的影响。结构表征表明，Fe和Na离子进入ZnO晶格时没有形成二次相。所有样品均具有室温下的铁磁行为，这是由于电子捕获氧空位（f中心）与磁性铁离子耦合交换所致。随着Na浓度的增加，氧空位介导的铁磁态增强。通过观察Na浓度、载流子浓度与磁化强度之间的关系，揭示了zno基DMS体系中缺陷对铁磁性的调节作用。(C) 2012年Elsevier B.V.出版
The effect of defects in the diluted magnetic semiconductor (DMS) of Fe and Na co-doped ZnO nanoparticles was investigated. Structural characterizations revealed that Fe and Na ions enter into ZnO lattice without any secondary phase. The ferromagnetic behaviors at room temperature were found in all samples, which are attributed to the exchange via electron trapped oxygen vacancies (F-center) coupled with magnetic Fe ions. With the increase of the Na concentration, the oxygen vacancy mediated ferromagnetic state is enhanced. The observed correlation between the Na concentration, the carrier concentration and the magnetization revealed the role of the defect in tuning the ferromagnetism in the ZnO-based DMS system. (C) 2012 Published by Elsevier B.V.