Structural, optical and magnetic properties of cobalt-doped ZnTe dilute magnetic semiconductors

Cobalt-doped ZnTe (Co:ZnTe) polycrystalline powders with different Co concentrations (0%, 3%, 5% and 8%) are prepared by solid state reaction method with an aim to study their dilute magnetic semiconducting behaviour. The effect of Co doping on the structural, optical and magnetic properties of the...

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Bibliographic Details
Published in:Journal of materials science. Materials in electronics 2020-09, Vol.31 (18), p.15140-15152
Main Authors: Shobana, M., Meher, S. R.
Format: Article
Language:English
Subjects:
Bulk density
Characterization and Evaluation of Materials
Chemistry and Materials Science
Cobalt
Density functional theory
Dilution
Ferromagnetism
Magnetic properties
Magnetic semiconductors
Magnetism
Magnetometers
Materials Science
Morphology
Optical and Electronic Materials
Optical properties
Optoelectronics
Photoelectrons
Photoluminescence
Raman spectroscopy
Room temperature
Spectroscopic analysis
Spectrum analysis
X ray photoelectron spectroscopy
Zinc tellurides
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Summary:Cobalt-doped ZnTe (Co:ZnTe) polycrystalline powders with different Co concentrations (0%, 3%, 5% and 8%) are prepared by solid state reaction method with an aim to study their dilute magnetic semiconducting behaviour. The effect of Co doping on the structural, optical and magnetic properties of the synthesized samples are investigated. The phase and crystallinity of Co:ZnTe powders are studied through X-ray diffraction and Raman spectroscopy. The surface morphology has been analysed through scanning electron microscopy. The chemical environment of the dopant in the host lattice is analysed through X-ray photoelectron spectroscopy. The optoelectronic properties of Co:ZnTe powder samples are evaluated through diffuse reflectance spectroscopy and photoluminescence spectroscopy. The ferromagnetic behaviour of the samples has been investigated at room temperature by the vibrating sample magnetometer. The origin of magnetism in ideal Co:ZnTe bulk system has been analysed through ab initio density functional theory.
ISSN:0957-4522
1573-482X
DOI:10.1007/s10854-020-04079-y