The making of ferromagnetic Fe doped ZnO nano-clusters

Details The making of ferromagnetic Fe doped ZnO nano-clusters The making of ferromagnetic Fe doped ZnO nano-clusters

2009-05-08

arxiv.org/abs/0905.1176v1

Appl. Phys. Lett. 94, 192503 (2009)

Physics

Condensed Matter

Materials Science

3 pages, 3 figures

Scientific paper

10.1063/1.3136904

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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