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- W3046120844 endingPage "412383" @default.
- W3046120844 startingPage "412383" @default.
- W3046120844 abstract "Abstract In the present investigation, pristine nickel oxide (NiO) and cobalt oxide (Co3O4) nanoparticles have been synthesised by well pronounced sol-gel auto combustion route. A series of Co3O4-NiO nanocomposite with varying NiO concentration from 10% to 40% by weight to Co3O4, has been synthesised using sonochemical route. A qualitative study of structural, optical and magnetic properties of the nanocomposite series of Co3O4-NiO was performed by analysing X-Ray Diffraction, Raman Spectroscopy, Fourier Transform Infrared Spectroscopy (FTIR), Ultra violet Diffuse Reflectance Spectroscopy (UV-DRS), Transmission Electron Microscopy (TEM), X-Ray Photoelectron Spectroscopy (XPS) and Vibrating Sample Magnetometer (VSM) as well as electron paramagnetic resonance (EPR). From XRD measurements, crystalline phases of pure NiO, Co3O4 and their composites have been confirmed. The crystallite sizes determined by Debye Scherer and Williamson Hall methods were found in good agreement. The interplanar spacing has been calculated using HRTEM images for the synthesised samples. Raman analysis confirms the presence of bands and witnesses the formation of the pure and composite samples. From VSM measurements at room temperature M-H curves witnessed the weak ferromagnetism along antiferromagnetic portion in the samples of NiO & Co3O4-NiO nanocomposites whereas Co3O4 is purely antiferromagnetic. Moreover, EPR measurements confirm the presence of unpaired electrons and field resonance decreases with increase in g value with increasing NiO concentration in the composite samples as compared to NiO sample." @default.
- W3046120844 created "2020-08-03" @default.
- W3046120844 creator A5002351623 @default.
- W3046120844 creator A5064573720 @default.
- W3046120844 date "2020-12-01" @default.
- W3046120844 modified "2023-09-29" @default.
- W3046120844 title "Interfacial exchange coupling and defects driven magnetic and optical properties of Co3O4-NiO nanocomposites" @default.
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- W3046120844 doi "https://doi.org/10.1016/j.physb.2020.412383" @default.
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