Synthesis and magnetic behavior of nanostructured ferrites for spintronics

Tomar, M. S.; Singh, Surinder P.; Perales-Pérez, Óscar; Guzman, R.; Calderón, E.; Rinaldi‐Ramos, Carlos M.

doi:10.1016/j.mejo.2005.02.086

Cited by 50 publications

(18 citation statements)

References 6 publications

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“…At the same time, the non-saturated magnetization suggests the existence of strong antiferromagnetic inter-cluster interactions mixed with ferromagnetic interactions inside the clusters [34][35][36]. The absence of coercivity at room temperature could also be attributed to the presence of Zn atoms in the otherwise ferromagnetic cobalt ferrite phase, for the presented composition [37].…”

Section: Magnetic Studiesmentioning

confidence: 80%

Synthesis and characterization of CoxZn1−xFe2O4 magnetic nanoparticles via a PEG-assisted route

Gözüak

Köseoğlu

Baykal

et al. 2009

Journal of Magnetism and Magnetic Materials

199

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Section: Magnetic Studiesmentioning

confidence: 80%

Synthesis and characterization of CoxZn1−xFe2O4 magnetic nanoparticles via a PEG-assisted route

Gözüak

Köseoğlu

Baykal

et al. 2009

Journal of Magnetism and Magnetic Materials

199

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“…In the last decades ferrite-based magnetic films have received great attention due to their potential use in several technological applications, as for instance in microwave devices, 1 structures for spin electronics, [2][3][4] magnetic data storage media, 5 6 and gas sensors. 7 These applications demand the preparation of high-quality ferrite films which so far have been deposited following different methods such as pulsed laser deposition (epitaxial iron oxide films on MgO substrates), 8 9 spin-coating, 3 radiofrequency sputtering, 10 and screen printing of ferrite powder on alumina substrate.…”

Section: Introductionmentioning

confidence: 99%

“…7 These applications demand the preparation of high-quality ferrite films which so far have been deposited following different methods such as pulsed laser deposition (epitaxial iron oxide films on MgO substrates), 8 9 spin-coating, 3 radiofrequency sputtering, 10 and screen printing of ferrite powder on alumina substrate. 11 With the current trend toward miniaturization of magnetic systems, superparamagnetic iron oxide (SPIO)-based materials have gained increasing attention, especially for their potential use as components in the bottom-up approach for building nanosized magnetic materials.…”

Section: Introductionmentioning

confidence: 99%

Magnetic Nanocomposites Fabricated via the Layer-by-Layer Approach

Paterno

Soler²,

Fonseca³

et al. 2010

J. Nanosci. Nanotech.

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In this study we describe the fabrication and characterization of nanocomposites consisting of layer-by-layer assembled polyaniline, sulfonated polystyrene, and maghemite nanoparticle layers. In order to assemble the starting components via electrostatic interaction, stable magnetic fluid containing maghemite nanoparticles (d approximately = 7 nm) with either positive or negative surface charges was used as source of nanoparticles for the layer-by-layer assembly. The structure, morphology, electrical and magnetic properties of such nanocomposite films were investigated by UV-Vis spectroscopy, atomic force microscopy, electrical, and magnetic measurements. The amount of PANI, PSS and maghemite nanoparticles within the nanocomposite films increased almost linearly with the number of deposited layers. Atomic force microscopy image of typical polyaniline/maghemite nanocomposites reveal nanoparticles adsorbed all over the film surface. The as-produced nanocomposite exhibits electrical conductivity and superparamagnetism behavior at room temperature, the latter confirmed by the absence of magnetic hysteresis.

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“…The most peaks of the Al y Cu 0.15 Zn 0.85-y Fe 2 O 4 were indexed to the crystal planes of spinel Zn ferrite (311, 222, 422, 511, and 440) [10,11]. The extra reflection peaks of Zn ferrite were also found in all patterns, and the observation of these peaks is common, especially at low sintering temperatures [12]. The average grain sizes of iron ferrite were calculated from measurements of the pattern diffraction using the formula of Scherrer.…”

Section: Methodsmentioning

confidence: 92%

Synthesis and Characterization of AlyCu0.15Zn0.85-yFe2O4 Ferrite Prepared by the Sol-Gel Method

Al‐Saadi¹

2018

International Journal of Electrochemical Science

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Nano powder of zinc ferrite with the chemical formula Al y Cu 0.15 Zn 0.85-y Fe 2 O 4 (y = 0.15, 0.30, 0.45, 0.60, 0.75) was synthesized by the sol-gel/auto combustion technique. The average crystallite size was found to be in the range of 28.82-42.27 nm, and the lattice constant decreased from 8.3958 to 8.2966 Å, while the density increased from 5.271 to 5.386 g/cm 3 with increasing Al content. The dielectric loss factor (ɛ″), dielectric constant (ɛ′) and AC electric conductivity (σ a.c) were studied, and it was found that (ɛ′) and (ɛ″) decreased with increasing frequency, while the behavior of conductivity was the opposite. It was also found that there was a variation in the behavior of (ɛ′), (ɛ″) and (σ a.c) based on Al content, and the highest values were found for the sample with an Al content of x= 0.3.

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Synthesis and magnetic behavior of nanostructured ferrites for spintronics

Cited by 50 publications

References 6 publications

Synthesis and characterization of CoxZn1−xFe2O4 magnetic nanoparticles via a PEG-assisted route

Synthesis and characterization of CoxZn1−xFe2O4 magnetic nanoparticles via a PEG-assisted route

Magnetic Nanocomposites Fabricated via the Layer-by-Layer Approach

Synthesis and Characterization of AlyCu0.15Zn0.85-yFe2O4 Ferrite Prepared by the Sol-Gel Method

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