Magnetic properties of Co-doped ZnO nanoparticles

Franco, A.; Pessoni, H.V.S.; Ribeiro, P. R. T.; Machado, F.L.A.

doi:10.1016/j.jmmm.2016.10.159

Cited by 36 publications

(5 citation statements)

References 40 publications

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“…affect the ferromagnetic ordering. 2,16,27,28 The above issues are still fairly unresolved and thus detailed experimental and theoretical investigations are required especially to realize ion interactions inside the system i.e., to probe the local environment around the host and the dopant atom carefully to obtain explicit results regarding the origin of FM in these systems.…”

Section: Introductionmentioning

confidence: 99%

Influence of Cu doping on the local electronic and magnetic properties of ZnO nanostructures

et al. 2020

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Section: Introductionmentioning

confidence: 99%

Influence of Cu doping on the local electronic and magnetic properties of ZnO nanostructures

et al. 2020

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“…There is currently great interest in semiconductor oxides and their heterostructures due to their potential applications in spintronic devices [1], photocatalysis [2], lightemitting diodes, lasers [3] and solar cells [4]. Tin dioxide (SnO 2 ) is one of the most used semiconductor oxides, related to outstanding properties such as high transparency in the visible range, high reflectivity in the infrared [5] and high n-type free carrier concentration [6], even in the undoped form, which may lead to a high conductivity when electron scattering phenomena are prevented.…”

Section: Introductionmentioning

confidence: 99%

X-ray absorption spectroscopy and Eu3+-emission characteristics in GaAs/SnO2 heterostructure

et al. 2020

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X-ray absorption near edge structure (XANES) and extended X-ray absorption fine structure (EXAFS) data are used for investigating heterostructure samples of GaAs/SnO 2. XANES data are used for analyzing the local organization around Eu in the heterostructure formed by GaAs and Eu-doped SnO 2. The differences between the XANES data for these samples and data obtained for Eu-doped SnO 2 thin films, deposited on glass substrate, are assumed as responsible for the differences in the photoluminescence (PL) spectra concerning the Eu 3+ emission, since films deposited on glass substrate do not present Eu 3+ PL transitions until the annealing temperature is rather high. Eu 3+ emission is explored using two different excitation sources: 350 nm from a Kr + laser (above SnO 2 energy bandgap) and 488 nm from an Ar + laser (below SnO 2 bandgap energy). The existence of more organized regions around the Eu 3+ site observed for the heterostructure surface may be associated with the Eu 3+ luminescent emission. The main and secondary features in the XANES show that there are differences in the average local Eu environment for the SnO 2 :Eu isolated thin films and heterostructures, being more organized in the latter. Electrical characterization evidences that the portion of the resistivity reduction that corresponds to photo-ionized intrabandgap states is responsible for the persistent photoconductivity phenomenon in the heterostructures.

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“…The incorporation of transition metal ions may change the magnetism and conducting properties of the ZnO. [23][24][25][26] Concordantly, cobalt doping was performed to alter the magnetic properties of ZnO in the present work. For this purpose, Co-doped ZnO particles were synthesized via the Sol-Gel method with doping concentrations of 0%, 3%, 6%, 9%, and 12%.…”

Section: Introductionmentioning

confidence: 92%

Manufacturing radar-absorbing composite materials by using magnetic Co-doped zinc oxide particles synthesized by Sol-Gel

Atay

İçin

2020

Journal of Composite Materials

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An indicator of being a strong country in today's world is that they have powerful weapons. In this sector where science is used exceedingly, the “stealth” takes an important place. Radar-absorbing materials are used in stealth technology to disguise an object from radar detection, such that it can allow a plane to be perceived as a bird. In this study, Co-doped zinc oxide reinforced styrofoam sheet composites were manufactured as radar-absorbing materials. For this purpose, Co-doped zinc–ZnO particles were synthesized via the Sol-Gel method with doping concentrations of 0%, 3%, 6%, 9%, and 12%. They were embedded in a styrofoam matrix with different loading levels to see the concentration dependence. The as-prepared powders were characterized by using X-ray diffraction and Scanning Electron Microscope-Energy Dispersive Spectroscopy. Magnetic characterization of samples was carried out using a vibrating sample magnetometer. Finally, the radar-absorbing test was applied with a network analyzer to achieve the main purpose of this research. It was concluded that Co-doped zinc oxide reinforced composites have electromagnetic properties that indicate potential applications in the radar-absorbing area.

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Magnetic properties of Co-doped ZnO nanoparticles

Cited by 36 publications

References 40 publications

Influence of Cu doping on the local electronic and magnetic properties of ZnO nanostructures

Influence of Cu doping on the local electronic and magnetic properties of ZnO nanostructures

X-ray absorption spectroscopy and Eu3+-emission characteristics in GaAs/SnO2 heterostructure

Manufacturing radar-absorbing composite materials by using magnetic Co-doped zinc oxide particles synthesized by Sol-Gel

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