4.6 Article

The making of ferromagnetic Fe doped ZnO nanoclusters

期刊

APPLIED PHYSICS LETTERS
卷 94, 期 19, 页码 -

出版社

AMER INST PHYSICS
DOI: 10.1063/1.3136904

关键词

ab initio calculations; antiferromagnetic materials; crystal defects; density functional theory; ferromagnetic materials; II-VI semiconductors; iron; magnetic semiconductors; nanostructured materials; semiconductor doping; zinc compounds

资金

  1. Swedish Research Council (VR)
  2. VR/SIDA

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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.

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