Structural, optical and magnetic properties of Zn 1−x Co x O prepared by the sol–gel route

Srinet, Gunjan; Varshney, Prateek; Kumar, Rohit; Sajal, Vivek; Kulriya, P.K.; Knobel, M.; Sharma, S. K.

doi:10.1016/j.ceramint.2013.01.025

Cited by 53 publications

(14 citation statements)

References 37 publications

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“…Two strong peaks were observed at around 1021.7 eV and 1044.8 eV corresponding to Zn 2p 3/2 and Zn 2p 1/2 states, respectively. No obvious shift of the Zn 2p peaks is observed and the peak positions are closely matching with the standard value for ZnO [37,43], indicating that Zn atoms are in the 2þ oxidation state. Since the energy value of Zn 2p 3/2 peak is below those of the metallic Zn, we may rule out the formation of Zn clusters in the doped nanocrystalline particles.…”

Section: X-ray Photoelectron Spectroscopy Resultssupporting

confidence: 72%

“…The question whether the observed RTFM behavior in Zn x Co 1-x O is due to intrinsic effect (carrier mediate) or if it is just induced by secondary phases or even by interfaces is still with no firm answer. In addition, the correlation between the magnetic and the optical behavior in these nanocrystalline particles is not completely clear since many reports in the literature gave contradictory results [7,37,41].…”

Section: Introductionmentioning

confidence: 95%

See 1 more Smart Citation

Magnetic and optical properties of Co-doped ZnO nanocrystalline particles

Shatnawi

Alsmadi

Bsoul

et al. 2016

Journal of Alloys and Compounds

112

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Section: X-ray Photoelectron Spectroscopy Resultssupporting

confidence: 72%

Section: Introductionmentioning

confidence: 95%

Magnetic and optical properties of Co-doped ZnO nanocrystalline particles

Shatnawi

Alsmadi

Bsoul

et al. 2016

Journal of Alloys and Compounds

112

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“…The probable reason can be described as air annealing may absorb oxygen and decrease the oxygen vacancy concentration. Thus, the findings confirm that the oxygen vacancies play a key role in inducing ferromagnetism [54,55].…”

Section: Magnetic Propertiessupporting

confidence: 74%

“…The peak shift in the diffractograms for Co-doped ZnO is imperceptible which may be due to the fairly analogous ionic radius of cobalt (Co 2+ = 0.58 Å) and zinc (Zn 2+ = 0.60 Å) [39][40][41] Figs. 3a and 4a respectively.…”

Section: Structural Characterizationmentioning

confidence: 99%

Study of the hydrogenation and re-heating of Co-doped ZnO and In2O3 Nano composites

Mukherji

Mathur

Samariya

et al. 2018

Adv Compos Hybrid Mater

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Nanocomposite samples of zinc oxide (ZnO) and indium oxide (In 2 O 3 ) doped with Co (at 1.5% molar concentration) are synthesized through conventional solid-state reaction technique. These samples are taken in a quartz tube and placed in reduction furnace for post-annealing in the presence of hydrogen for~10 h at around 550°C. The X-ray diffraction (XRD) study confirms the formation of hexagonal wurtzite structure for ZnO, Zn H exhibited a perceptible ferromagnetic behavior at 300 K whereas it overturns significantly after long air sintering. An effort has been made to fit the experiential M-H data of hydrogenated samples to the Bound Magnetic Polaron (BMP) model. MATLAB-based simulations have been performed to validate the homogeneity in particle distribution of the samples evinced through SEM micrographs. A multivariate assessment viz. hierarchical cluster analysis is also executed to corroborate and strengthen the experimental findings of magnetic properties.

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“…The PL spectroscopy is an effective method to investigate the presence of defects in semiconductors [23]. Figure 5 shows the PL spectra of ZnO nanoparticles annealed at different temperatures with CA and PVA as chelating agents.…”

Section: Photoluminescencementioning

confidence: 99%

Annealing effects on the structural and optical properties of ZnO nanoparticles with PVA and CA as chelating agents

Mallika

Reddy

2015

J Adv Ceram

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Abstract:The effects of annealing temperatures and chelating agents on the structural and optical properties of ZnO nanoparticles were investigated. The average particle size of ZnO nanoparticles increased with increase of annealing temperatures. The decrease of the full width at half maximum (FWHM) with increasing annealing temperatures inferred increase of particle/grain growth. The grain sizes were also observed to be increased with increase of annealing temperatures. From the absorption spectra of the samples, the absorption was red-shifted and the energy band gap was blue-shifted with increase of annealing temperatures. A sharp UV emission peak was observed and the intensity of this peak increased with annealing temperatures corresponding to the high crystallinity in the samples. At high annealing temperature of 700 ℃, ZnO exhibited a less intense deep level emission. This negligible deep level emission was attributed to the oxygen vacancies created at higher annealing temperatures.

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Structural, optical and magnetic properties of Zn 1−x Co x O prepared by the sol–gel route

Cited by 53 publications

References 37 publications

Magnetic and optical properties of Co-doped ZnO nanocrystalline particles

Magnetic and optical properties of Co-doped ZnO nanocrystalline particles

Study of the hydrogenation and re-heating of Co-doped ZnO and In2O3 Nano composites

Annealing effects on the structural and optical properties of ZnO nanoparticles with PVA and CA as chelating agents

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