Direct observation of structure effect on ferromagnetism in Zn1-xCoxO nanowires

Wen-Bin Jian*, Z. Y. Wu, R. T. Huang, F. R. Chen, J. J. Kai, C. Y. Wu, S. J. Chiang, M. D. Lan, Juhn-Jong Lin

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

43 Scopus citations

Abstract

Diameter-controllable single-crystalline ZnO nanowires (NWs), with the [0001] growth direction in the plane, have been fabricated by using thermal evaporation method. The as-grown NWs with diameters of ∼40 nm were implanted with various amounts of Co ions. These Zn1-x Cox O (x≤0.11) NWs possessed a high density of bombardment-induced orientation variations and stacking faults, and exhibited paramagnetic behavior. After thermal annealing, the structural defects largely disappeared and noticeable hysteresis in the magnetization loops were observed, indicating the presence of apparent ferromagnetic ordering in the NWs. This result provides important insight into the role played by defects in relation to the occurrence of ferromagnetism in diluted magnetic semiconductor NWs.

Original languageEnglish
Article number233308
Number of pages4
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume73
Issue number23
DOIs
StatePublished - 21 Jun 2006

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