Effects of Cr-doping on the optical and magnetic properties in ZnO nanoparticles prepared by sol–gel method

Liu, Yang; Yang, Jing; Guan, Qingxin; Yang, Lili; Zhang, Yongjun; Wang, Yaxin; Feng, Bo; Cao, Jianliang; Liu, Xiaoyan; Yang, Yanting; Wei, Maobin

doi:10.1016/j.jallcom.2009.07.076

Cited by 130 publications

(48 citation statements)

References 30 publications

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“…Liu et al [32] indicated that point defects such as Zn i or V Zn are responsible for ferromagnetism in Cr:ZnO samples and Hong et al [47] have pointed out that the magnetization in their Cr:ZnO films is related to oxygen vacancies (V o ). Furthermore, Liu et al [48] suggested that two key factors lead to the appearance of ferromagnetism in TM-doped ZnO nanocrystals: one is the increase of the number of defects and oxygen vacancies, the other is the exchange interactions between the TM ions and the O ion spin moment.…”

Section: Resultsmentioning

confidence: 99%

Structural, optical and magnetic properties of Ni-doped ZnO micro-rods grown by the spray pyrolysis method

Yılmaz

McGlynn

Bacaksız

et al. 2012

Chemical Physics Letters

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Undoped and Ni-doped ZnO micro-rod arrays were successfully synthesized by the spray pyrolysis method on glass substrates. Analysis of the samples with x-ray diffraction and scanning electron microscopy showed that these micro-rod arrays had a polycrystalline wurtzite structure with a highly c-axis preferred orientation. Photoluminescence studies at both 300 K and 10 K show that the incorporation of nickel leads to a relative increase in the visible blue light band intensity. Magnetic measurements indicated that Ni-doped ZnO samples exhibit ferromagnetic behavior at room temperature, which is possibly related to the presence of point defects.

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Section: Resultsmentioning

confidence: 99%

Structural, optical and magnetic properties of Ni-doped ZnO micro-rods grown by the spray pyrolysis method

Yılmaz

McGlynn

Bacaksız

et al. 2012

Chemical Physics Letters

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“…Until now, ZnO nanostructures have been fabricated by chemical solution deposition method [9,10], physical vapor deposition [11][12][13][14], pulsed laser deposition [15] and sol-gel process [16][17][18][19]. Among these methods, the sol-gel technique has great advantages due to its simplicity, safety, high turnout and low cost.…”

Section: Introductionmentioning

confidence: 99%

Tunable deep-level emission in ZnO nanoparticles via yttrium doping

Yang

Wang

Yang

et al. 2011

Journal of Alloys and Compounds

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“…Liu et al 66 indicated that point defects such as Zn i or V Zn are responsible for ferromagnetism in Cr:ZnO samples. Furthermore, Liu et al 67 suggested that two key factors lead to the appearance of ferromagnetism in TMdoped ZnO nanocrystals: one is the increase of the number of defects and oxygen vacancies and the other is the exchange interactions between the TM ions and the O ion spin moment.…”

Section: Resultsmentioning

confidence: 99%

Effects of Cu diffusion-doping on structural, optical, and magnetic properties of ZnO nanorod arrays grown by vapor phase transport method

Yılmaz¹,

McGlynn²,

Bacaksız³

et al. 2012

Journal of Applied Physics

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Realization of a 33 GHz phononic crystal fabricated in a freestanding membrane AIP Advances 1, 042001 (2011) Preparation of uncapped CdSe1xSx semiconducting nanocrystals by mechanical alloying J. Appl. Phys. 110, 124306 (2011) Formation mechanisms of spatially-directed zincblende gallium nitride nanocrystals J. Appl. Phys. 110, 124307 (2011) Surface modification of monocrystalline zinc oxide induced by high-density electronic excitation J. Appl. Phys. 110, 124310 (2011) Investigation of poly(o-anisidine)-SnO2 nanocomposites for fabrication of low temperature operative liquefied petroleum gas sensor J. Appl. Phys. 110, 124501 (2011) Additional information on J. Appl. Phys. Well-aligned ZnO nanorods were prepared by the vapor phase transport method on Si covered with a ZnO buffer layer. After the nanostructure growth, Cu was doped into the ZnO nanorods by diffusion at three different temperatures and for different times. Undoped and Cu diffusion-doped ZnO samples are highly textured, with the c axis of the wurtzite structure along the growth direction. The incorporation of Cu caused some slight changes in the nanorod alignment, although the wurtzite crystal structure was maintained. X-ray photoelectron spectroscopy measurements revealed that Cu ions were in a divalent state and substituted for the Zn 2þ ions of the ZnO matrix. Photoluminescence results at 10 K indicate that the incorporation of copper leads to a relative increase of Cu-related structured green band deep level intensity. Magnetic measurements revealed that both undoped and Cu diffusion-doped ZnO samples exhibited room temperature ferromagnetism. It was also found that bound magnetic polarons play an important role in the appearance of room temperature ferromagnetism in Cu diffusion-doped ZnO nanorods.

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Effects of Cr-doping on the optical and magnetic properties in ZnO nanoparticles prepared by sol–gel method

Cited by 130 publications

References 30 publications

Structural, optical and magnetic properties of Ni-doped ZnO micro-rods grown by the spray pyrolysis method

Structural, optical and magnetic properties of Ni-doped ZnO micro-rods grown by the spray pyrolysis method

Tunable deep-level emission in ZnO nanoparticles via yttrium doping

Effects of Cu diffusion-doping on structural, optical, and magnetic properties of ZnO nanorod arrays grown by vapor phase transport method

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