Structural, magnetic and dielectric properties of reduced graphene oxide/ La0.9Bi0.1FeO3 nanocomposites

El-Khawas, E. H.; Azab, A. A.; Mansour, A. M.

doi:10.1016/j.matchemphys.2019.122335

Cited by 45 publications

(14 citation statements)

References 71 publications

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“…Similar work has been reported by Khawas et al (2020), in which they reported RGO-La 0.9 Bi 0.1 FeO 3 composite with a σ AC in the order of 10 − 6 S/m. Likewise, Kavinkumar et al (2016) reported a σ AC in the order of 10 − 3 S/m for the GO-BT (barium titanate) nanocomposite [12,28]. Figure 9, describes the electric moduli (M″) against frequency for GO, CF, NCF and composites, Fig.…”

Section: Resultsmentioning

confidence: 85%

Structural, magnetic and dielectric properties of ultrafine nickel substituted cobalt ferrite− reduced graphene oxide nanocomposites

Ambikeswari

Manivannan

2020

Preprint

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Nickel substituted cobalt ferrite − reduced graphene oxide (NCF-RGO) composite was synthesized using a facile one-pot chemical co-precipitation method. The addition of graphene oxide (GO) leads to the dimensional decrease of NCF nanoparticles (< 10 nm) in the composite, which controls the magnetic and dielectric properties. Nickel with lower ionic radius, compared to cobalt and its substitution in the composite along with the incorporation of GO results in the transition of ferromagnetic to superparamagnetic ordering. A large magnetisation of 51.63 emu/g and a high dielectric constant of 3.92 x 10 6 (at 100 Hz) were also developed from the composite. The conjugated mechanism of magnetic combined electrical property, with a high charge–storing capability and tuneable magnetization, enables its potential use in magnetic flipping or switching devices and data storing systems.

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Section: Resultsmentioning

confidence: 85%

Structural, magnetic and dielectric properties of ultrafine nickel substituted cobalt ferrite− reduced graphene oxide nanocomposites

Ambikeswari

Manivannan

2020

Preprint

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“…The increase in population of charge carriers at the grain boundaries is responsible for the dielectric polarization to take place at low-frequencies [27]. In addition, the polarization in ferrites is attributed to the exchange interaction between Fe 2+ and Fe 3+ ions, which in turn produces the local displacement of electrons, in the same direction as that of the applied electric eld that causes polarization [12]. Figure 7(c) represents the ε′ of the prepared composites and it was found to have a two-to three-order rise and calculated to be 2.43 × 10 5 and 3.92 × 10 6 at 100 Hz for CF-RGO and NCF-RGO, respectively.…”

Section: Resultsmentioning

confidence: 99%

“…Among them the composites made from GO and Zn x Fe 1− x Fe 2 O 4 produces ultra ne ferrite nanoparticles that enhanced the dielectric constant upto 10 2 and exhibited a ferromagnetic property in it [11]. Likewise, RGO-La 0.9 Bi 0.1 FeO 3 composites with ferromagnetic ordering, synthesized via sol-gel method, also delivered a dielectric constant of 10 5 [12]. Yet another material, Co-Ni doped Ca ferrite (Ca 2 Co 1.5 Ni 0.5 Fe 12 O 22 ) prepared via sol-gel technique, when composited with GO, increased its dielectric permittivity from 10 1 to 10 3 .…”

Section: Introductionmentioning

confidence: 99%

Structural, Magnetic, and Dielectric Properties of Ultrafine Nickel-Substituted Cobalt Ferrite-Reduced Graphene Oxide Nanocomposites

Ambikeswari

Manivannan

2021

J. Electron. Mater.

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Nickel substituted cobalt ferrite − reduced graphene oxide (NCF-RGO) composite was synthesized using a facile one-pot chemical co-precipitation method. The addition of graphene oxide (GO) leads to the dimensional decrease of NCF nanoparticles (< 10 nm) in the composite, which controls the magnetic and dielectric properties. Nickel with lower ionic radius, compared to cobalt and its substitution in the composite along with the incorporation of GO results in the transition of ferromagnetic to superparamagnetic ordering. A large magnetisation of 51.63 emu/g and a high dielectric constant of 3.92x 10 6 (at 100 Hz) were also developed from the composite. The conjugated mechanism of magnetic combined electrical property, with a high charge-storing capability and tuneable magnetization, enables its potential use in magnetic ipping or switching devices and data storing systems.

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“…On the other hand, as presented through micro-Raman analysis, the increase of GO/CNTs defect also led to the enhancement of their magnetic properties. It was known that the presence of defects in carbonaceous materials such as graphene can induce spin polarization which can enhance the magnetic properties of the materials [4,35,36].…”

Section: Resultsmentioning

confidence: 99%

Magnetic properties of graphene oxide via a simple mixing with waste engine oil-based carbon nanotubes

Nurhafizah

2020

SN Appl. Sci.

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Graphene oxide (GO) was synthesized via a simple electrochemical exfoliation of graphite in a surfactant-containing aqueous solution. A novel custom-made surfactant, 1,4-bis (neopentyloxy)-3-(neopentyloxycarbonyl)-1,4-dioxobutane-2-sulfonate (TC14) was used to assist the exfoliation process. The structural and magnetic properties of prepared GO were examined using electron microscopies, micro-Raman, and Fourier transform infrared spectroscopies, and vibrating sample magnetometer (VSM). Room temperature VSM measurement showed a diamagnetic response of pristine GO under a high magnetic field. This indicated the low defect and the absence of any impurities in the synthesized GO. Simple mixing of GO and carbon nanotubes (CNTs) was also done to study their magnetic properties. CNTs were initially synthesized from waste engine oil using thermal chemical vapour deposition. It was found that the addition of magnetic CNTs has successfully induced the ferromagnetism in the GO sample. The saturation magnetization and average coercivity of GO/CNTs were observed to be 6.13 memu and 345.12 G, respectively. This study offers a low cost and simple method to induced magnetism in GO as compared to the common chemical modifications of GO.

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Structural, magnetic and dielectric properties of reduced graphene oxide/ La0.9Bi0.1FeO3 nanocomposites

Cited by 45 publications

References 71 publications

Structural, magnetic and dielectric properties of ultrafine nickel substituted cobalt ferrite− reduced graphene oxide nanocomposites

Structural, magnetic and dielectric properties of ultrafine nickel substituted cobalt ferrite− reduced graphene oxide nanocomposites

Structural, Magnetic, and Dielectric Properties of Ultrafine Nickel-Substituted Cobalt Ferrite-Reduced Graphene Oxide Nanocomposites

Magnetic properties of graphene oxide via a simple mixing with waste engine oil-based carbon nanotubes

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