Correlated d(0) ferromagnetism and photoluminescence in undoped ZnO nanowires

• We report the correlated d(0) 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.

Nyckelord

catalysis

ferromagnetic materials

II-VI semiconductors

magnetoelectronics

nanofabrication

nanomagnetics

nanowires

photoluminescence

semiconductor growth

semimagnetic semiconductors

wide band gap semiconductors

zinc compounds

TECHNOLOGY

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