High-temperature ferromagnetism in Mn-doped ZnO nanowires

We have observed ferromagnetism in dilute ( ∼ 1 - 4 at. % ) Mn-doped crystalline ZnO nanowires at temperatures up to 400 K . Arrays of freestanding single crystal ZnO:Mn nanowires were fabricated by Au-catalyzed vapor-liquid-solid growth. Structure and compositional analyses revealed that Mn was inc...

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Bibliographic Details
Published in:Applied physics letters 2006-06, Vol.88 (26), p.263101-263101-3
Main Authors: Philipose, U., Nair, Selvakumar V., Trudel, Simon, de Souza, C. F., Aouba, S., Hill, Ross H., Ruda, Harry E.
Format: Article
Language:English
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Summary:We have observed ferromagnetism in dilute ( ∼ 1 - 4 at. % ) Mn-doped crystalline ZnO nanowires at temperatures up to 400 K . Arrays of freestanding single crystal ZnO:Mn nanowires were fabricated by Au-catalyzed vapor-liquid-solid growth. Structure and compositional analyses revealed that Mn was incorporated into the ZnO lattice. From the observed saturation magnetization, the magnetic moment per Mn atom is estimated to be between 0.3 μ B and 1.2 μ B . Photoluminescence measurements show a strong suppression of defect related midgap emission, indicative of an interplay between Mn doping and native point defects.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.2217707