Hydrothermally Synthesized CdS Nanoparticles: Effect of Fe Doping on Optical and Magnetic Properties

Kaur, Kamaldeep; Verma, N. K.

doi:10.1007/s10948-015-3156-9

Cited by 8 publications

(3 citation statements)

References 34 publications

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“…One could argue that Fe doping is a successful way of spin injection into CdO to obtain DMS of small size with extraordinary magnetic properties. The obtained value of magnetization here is superior to those reported for Mn-doped CdO (Kumar et al 2015), Co-doped CdO (Ahmad et al 2014), Fe-doped CdS (Kaur and Verma 2015) and Fe-doped ZnO (Kumar et al 2014). The colossal compositional variation of Hc as reflected from the anisotropy with the large value of room temperature coercivity recommend the use of this type of magnetic nanoparticles as pinning layer in spin valves demanding difficult and large demagnetizing field.…”

Section: Resultsmentioning

confidence: 50%

Drastic improvement in magnetization of CdO nanoparticles by Fe doping

2017

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Hydrothermal route was used in the preparation of Fe-doped CdO nanoparticles with 3, 5, 7 and 10 wt% and their structural and magnetic properties were investigated. Structural characterization using powder X-ray diffraction confirmed the single phase cubic symmetry of these nanoparticles. Particle size decreased monotonically with increasing the dopant ion concentration. The microstructure of the synthesized samples was studied by a high-resolution transmission electron microscopy (HRTEM) which confirmed the nanocrystalline nature of the samples. A vibrating sample magnetometer provided the hysteresis curves of all samples. Pure CdO reveals ferromagnetic behavior while antiferromagnetization is observed for all Fe-doped samples. Large coercivity as well as large area for the sample x = 0.05 is achieved.

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Section: Resultsmentioning

confidence: 50%

Drastic improvement in magnetization of CdO nanoparticles by Fe doping

2017

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“…On the other hand, CdS doped with 10%Fe emitted also violet and blue colors under the two preparation conditions [43]. Previously, Cd 1−x Fe x S (hexagonal structure) formed using hydrothermal or solvothermal methods exhibited green or (violet and green), respectively [39,44]. The violet and blue colors may result from (band edge transition which resulted from the recombination of excitons or shallowly trapped electron-hole pairs) and (donor, acceptor and trap states), respectively [45,46].…”

Section: Pl Analysismentioning

confidence: 91%

Structure, optical and electronic characteristics of iron-doped cadmium sulfide under nonambient atmosphere

Mohamed

Badawi

2021

Appl. Phys. A

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Iron-doped nano CdS was prepared in air and underflow of nitrogen applying the thermolysis technique. The impact of air and nitrogen atmosphere on the crystallinity and the different structure parameters of the obtained samples was investigated using X-ray diffraction measurements and applying Rietveld method. Analysis revealed the presence of two phases for CdS; hexagonal wurtzite and cubic zincblende with phase percentages greatly affected with preparation conditions; sample obtained under N 2 is almost pure hexagonal (97%). The particle morphology was investigated by FE-SEM, and the associated EDS spectra manifested elements percentages in accordance with those intended for preparation. The optical bandgap was greatly affected; compared with samples formed in air, it reduced upon doping with Fe as well as upon preparation under N 2 , it decreased from 2.58 eV for pristine CdS to 1.99 eV for Fe-doped CdS under N 2 . The photoluminescence (PL) intensity was also affected by the condition of preparation and iron doping. Pure and Fe-doped CdS samples emitted violet and blue colors. Density function theory (DFT) calculations were performed to explain the reason for the reduction of the optical bandgap upon doping CdS with Fe. The comparison between different electronic characteristics of pure and Fe-doped CdS samples was explored also by DFT calculation.

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“…CdS nanoparticles obtained by the chemical precipitation method utilizing polyvinylpyrrolidone as a capping agent revealed blue and green colors [48]. CdS prepared by hydrothermal technique exhibited blue and green emissions [49]. The emitted colors of CdS 1 − x can be described as follows (i) violet-blue band is ascribed to the band-edge emission [47], (ii) the green color can be accredited to transitions from the donor sulfur vacancy levels to the valance band and (iii) the orange emission color could be due to the recombination of defect complexes (I cd -V cd ) [50].…”

Section: Infrared Absorption Spectroscopy Studymentioning

confidence: 99%

Structural, optical, and electronic characteristics of non-stoichiometric nanocadmium sulfide

Mohamed

Farag

Badawi

2021

J Mater Sci: Mater Electron

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Samples of non-stoichiometric nano CdS 1 − x were synthesized by a simple thermolysis method by lowering the ratio of thiourea relative to cadmium acetate as starting precursors; Cd(Ac):(1-x) thiourea (x = 0.0, 0.03, 0.05 and 0.1). X'pert HighScore Plus program manifested biphasic CdS (cubic and hexagonal) and the Rietveld analysis was utilized to match the structural and microstructure parameters of the formed samples. The possibility of formed CdS 1 − x O x alloy due to the sulfur de ciency is also examined using the Rietveld method. A High-resolution transmission electron microscope imaging exhibited nano size particles with homogeneous morphology. Fourier transform infrared spectrometer was utilized to con rm the existence of O 2 in CdS 1 − x matrix. The bandgap energies for CdS 1 − x are reduced below the values of energy gaps of CdS and CdO upon increasing the parameter (x) forming a band gap "bowing".The photoluminescence (PL) emitted visible colors depending on the amount of sulfur de ciency and excitation wavelength used. The maximum PL intensity observed in CdS 0.9 sample, con rmed the presents of oxygen inside the matrix. The in uence of oxygen substitution or vacancies of sulfur on the electronic structure and optical features of CdS was also investigated applying density function calculations.

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Hydrothermally Synthesized CdS Nanoparticles: Effect of Fe Doping on Optical and Magnetic Properties

Cited by 8 publications

References 34 publications

Drastic improvement in magnetization of CdO nanoparticles by Fe doping

Drastic improvement in magnetization of CdO nanoparticles by Fe doping

Structure, optical and electronic characteristics of iron-doped cadmium sulfide under nonambient atmosphere

Structural, optical, and electronic characteristics of non-stoichiometric nanocadmium sulfide

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