標題: Direct observation of structure effect on ferromagnetism in Zn1-xCoxO nanowires
作者: Jian, WB
Wu, ZY
Huang, RT
Chen, FR
Kai, JJ
Wu, CY
Chiang, SJ
Lan, MD
Lin, JJ
電子物理學系
物理研究所
Department of Electrophysics
Institute of Physics
公開日期: 1-Jun-2006
摘要: 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 similar to 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.
URI: http://dx.doi.org/10.1103/PhysRevB.73.233308
http://hdl.handle.net/11536/12171
ISSN: 1098-0121
DOI: 10.1103/PhysRevB.73.233308
期刊: PHYSICAL REVIEW B
Volume: 73
Issue: 23
起始頁: 0
結束頁: 0
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