Structural, optical and magnetic properties of Fe-doped ZnO

Cheng, Wenjuan; Ma, Xiaoqing

doi:10.1088/1742-6596/152/1/012039

Cited by 55 publications

(30 citation statements)

References 25 publications

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“…The other one centered around 600 nm is a defect band. It is present in both doped and undoped fibers and most probably originates from oxygen vacancies [34].…”

Section: Resultsmentioning

confidence: 99%

Magnetic Fe doped ZnO nanofibers obtained by electrospinning

Baranowska‐Korczyc

Reszka

Sobczak

et al. 2011

J Sol-Gel Sci Technol

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We demonstrate structural and room temperature magnetic properties of Fe doped ZnO nanofibers (NFs) obtained by electrospinning followed by calcination. The observed NFs, formed from crystalographically oriented, approximately 4.5 nm particles conglomerates, were approximately 200 nm in diameter. The reported synthesis of room temperature ferromagnetic Fe doped ZnO NFs is both facile and economical, and is therefore suggested as a generic method of fabricating biocompatible magnetic materials. The major substrates selected for the NFs synthesis (Zn, Fe) comprised of relatively low toxicity materials. Incorporating 10% Fe into ZnO does not modify the wurtzite crystal structure of the host material. No evidence of impurity phase was detected by either X-ray or electron diffraction. Magnetometry studies and Magnetic Force Microscopy imaging reveal a local ferromagnetic order that persists up to room temperature. We suggest that the observed phenomenon is either due to a mechanism mediated by presence of oxygen vacancies and/or is related to iron-rich precipitates.

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“…The other one centered around 600 nm is a defect band. It is present in both doped and undoped fibers and most probably originates from oxygen vacancies [34].…”

Section: Resultsmentioning

confidence: 99%

Magnetic Fe doped ZnO nanofibers obtained by electrospinning

Baranowska‐Korczyc

Reszka

Sobczak

et al. 2011

J Sol-Gel Sci Technol

View full text Add to dashboard Cite

show abstract

“…and Co 2? is expected to distort the lattice structure with the shrinkage of the lattice constant [28]. Variation of lattice constant with Co doping concentration is shown in the inset of Fig.…”

Section: Structural Analysismentioning

confidence: 96%

Antiferromagnetic coupling in Co-doped ZnS

2015

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In this paper, we report room-temperature ferromagnetism in chemically synthesized Zn 1-x Co x S (0 B x B 0.10) diluted magnetic semiconductor nanoparticles of *3-5 nm. The incorporation of Co 2? ion for Zn 2? ions in ZnS lattice and the particle size were confirmed by XRD and TEM along with selected area electron diffraction analysis. UV-Vis measurement showed reduction in the bandgap energy with the increase in Co doping. Maximum magnetization was observed for samples with x = 0.04. From photoluminescence, spectra luminescence efficiency was found to get enhanced on Co doping. Magnetization behavior can be understood to be due to defect-induced ferromagnetism; however, for higher doping concentration, the antiferromagnetic coupling of CoCo interaction in the close proximity results in the decrease of the overall magnetization of the samples. Moreover, magneto-electronic study also showed a maximum negative magneto-resistance of *43 % for x = 0.04.

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“…The peaks near 709.3 eV can be signed as Fe 2þ 2p 3/2 . [29] For the species of Fe 3þ , the peak position was found to be between 710.6 and 711.2 eV, [30,31] while the Fe 4þ peak appeared in the range of 712e714 eV. [32] As shown in Fig.…”

Section: Xps Analysismentioning

confidence: 89%