Correlated d0 ferromagnetism and photoluminescence in undoped ZnO nanowires

Guozhong Xing; Dandan Wang; Jiabao Yi; Lili Yang; Ming Gao; Mi He; Jinghai Yang; Jun Ding; Tze Chien Sum; Tom Wu
March 2010
Applied Physics Letters;3/15/2010, Vol. 96 Issue 11, p112511
Academic Journal
We report the correlated d0 ferromagnetism and photoluminescence in undoped single-crystalline ZnO nanowires synthesized by using a vapor transport method. We systematically tune the oxygen deficiency in the ZnO nanowires from 4% to 20% by adjusting the growth conditions, i.e., selecting different catalyst (Au or Ag) and varying the growth temperature. Our study suggests that oxygen vacancies induce characteristic photoluminescence and significantly boost the room-temperature ferromagnetism. Such undoped ZnO nanowires with tunable magnetic and optical properties are promising to find applications in multifunctional spintronic and photonic nanodevices.


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