Evolution of the structure and magneto-optical properties of ion beam synthesized iron nanoclusters

Kennedy, J.; Leveneur, Jérôme; Takeda, Yoshihiko; Williams, G. V. M.; Kupke, S.; Mitchell, David R. G.; Markwitz, A.; Metson, James B.

doi:10.1007/s10853-011-5849-1

Cited by 15 publications

(9 citation statements)

References 52 publications

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“…Similarly, at 0.2PNCF and 0.5PNCF, four Raman modes F 2g (1), E g , F 2g (2) and A 1g are observed but not F 2g (3). The characteristic peaks of polymer are observed at 1604 cm −1 and corresponding to first‐order scattering (E 2g mode), while the peak at 1362 cm −1 due to the first‐order scattering process of sp carbons or carbonaceous . Highly intense bands at 1604 cm −1 and 1362 cm −1 are observed at 0.5PNCF compared to 0.2PNCF.…”

Section: Resultssupporting

confidence: 92%

“…Magnetic materials like ferrites can be employed as recording materials, microwave devices, humidity sensors and pigments, ultrahigh‐density data storage, magnetic sensors, spintronic devices, electromagnetic wave absorbers, magnetic composites, for bioanalysis and catalysis etc . A well known hard magnetic material with high coercivity and saturation magnetization was achieved in cobalt ferrites, as a competitive candidate for high‐density magnetic recording media .…”

Section: Introductionmentioning

confidence: 99%

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Novel polyvinyl alcohol polymer based nanostructure with ferrites co‐doped with nickel and cobalt ions for magneto‐sensor application

Arul

Manikandan

Ladchumananandasivam

et al. 2016

Polymer International

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Uniform nanosheet-like structures were synthesized by the polymer based co-precipitation route. Different concentrations of polyvinyl alcohol (pure (0 g), 0.2 g and 0.5 g) were added to nickel (Ni) and cobalt (Co) ion co-doped ferrite magnetic nanoparticles. X-ray diffraction confirmed a spinel structure phase of the Ni − Co ferrites. Enhanced average crystallite size (6.7%) of the Ni − Co ferrites was found on polymer incorporation. The molecular functional group of polyvinyl alcohol and Ni − Co ferrites was confirmed by infrared and Raman spectroscopy techniques. On adding polymer, the spherical morphology of the Ni − Co ferrites was tailored to nanosheets (200 nm × 300 nm). Therefore, the polymer based co-precipitation technique is an inexpensive, simple and effective route to engineer the morphology of the magnetic nanostructure and could be useful for gas sensor and magnetic sensors.

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Section: Resultssupporting

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Novel polyvinyl alcohol polymer based nanostructure with ferrites co‐doped with nickel and cobalt ions for magneto‐sensor application

Arul

Manikandan

Ladchumananandasivam

et al. 2016

Polymer International

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“…At low temperatures (~25 K), the moment of 0.5PUNCF was found to be 0.040 emu/g in both ZFC and FC. Surface anisotropy in 0.2PUNCF sample leads to high magnetization and low coercivity consistent with the magnetic properties of superparamagnetic nanoparticles [42][43][44][45][46][47][48]. …”

Section: Magnetic Measurementsmentioning

confidence: 63%

“…4. Zero field cooled (ZFC) and field cooled (FC) curves of UNCF are shown in showed hysteresis below blocking temperature [42][43][44]. At low temperatures (~32 K) of 0.2PUNCF (ZFC), the moment was decreased (0.0135 emu/g) may be due to blocking of particle moment in chaotic directions.…”

Section: Magnetic Measurementsmentioning

confidence: 99%

Enhanced magnetic properties of polymer-magnetic nanostructures synthesized by ultrasonication

Arul

Manikandan

Murmu

et al. 2017

Journal of Alloys and Compounds

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Polymer based nickel (Ni) and cobalt (Co) co-doped ferrites were prepared by adept ultrasonication route. Different concentrations of polymer [polyvinyl alcohol (PVA)] (0.2 g and 0.5 g) was added as a surfactant to the magnetic particles. The phase purity of Ni-Co ferrites (spinel structure) was confirmed by X-ray diffraction (XRD). Enhanced saturation magnetization of polymer based magnetic nanoparticles due to shape anisotropy and size. 0.2 wt% doped ferrite showed superparamagnetic characteristics with blocking temperature above room temperature. Hence, ultrasonication route is a rapid and effective technique for tailoring size and morphology of magnetic nanostructure that could be useful in magneticsensor applications.

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“…The various conventional methods to synthesise nanoparticles include chemical synthesis [5], polyol synthesis [6], laser ablation [7], and arc discharge [8]. Ion implantation is a novel method that could potentially be used to synthesise magnetic nanoparticles with unique properties tailored to suit different applications [9][10][11]. Near-surface iron nanoparticles have previously been synthesised in SiO 2 films using low-energy ion implantation followed by electron beam annealing [9,10].…”

Section: Introductionmentioning

confidence: 99%

Synthesis of magnetic nanoparticles by low-energy dual ion implantation of iron and nickel into silicon dioxide followed by electron beam annealing

Prakash

Williams

Kennedy

2017

IJNT

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Magnetic nanoparticles have been made by low-energy dual ion implantation of iron and nickel into SiO 2 with a nickel fluence ratio of 82% followed by electron beam annealing for 1800 s at 1000°C. After annealing, there is significant diffusion of iron and nickel into the silicon dioxide layer. Annealing also led to the formation of superparamagnetic nanoparticles with a narrow particle size distribution. The saturation moment at 5 K was 0.7 µ B

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Evolution of the structure and magneto-optical properties of ion beam synthesized iron nanoclusters

Cited by 15 publications

References 52 publications

Novel polyvinyl alcohol polymer based nanostructure with ferrites co‐doped with nickel and cobalt ions for magneto‐sensor application

Novel polyvinyl alcohol polymer based nanostructure with ferrites co‐doped with nickel and cobalt ions for magneto‐sensor application

Enhanced magnetic properties of polymer-magnetic nanostructures synthesized by ultrasonication

Synthesis of magnetic nanoparticles by low-energy dual ion implantation of iron and nickel into silicon dioxide followed by electron beam annealing

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