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Title: Direct observation of structure effect on ferromagnetism in Zn1−xCoxO nanowires
Authors: W. B. Jian
Z. Y. Wu
R. T. Huang
F. R. Chen
J. J. Kai
C. Y. Wu
S. J. Chiang
M. D. Lan
J. J. Lin
Contributors: 國立臺灣海洋大學:光電與材料科技學士學位學程(學系)
Date: 2006-06
Issue Date: 2018-11-23T08:17:53Z
Abstract: 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−xCoxO (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.
Relation: 73(23)
Appears in Collections:[Institute of Optoelectronic Sciences] Periodical Articles

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