Structural and magnetic properties of Co1−xZnxFe2O4 nanoparticles by co-precipitation method

Vaidyanathan, G.; Sendhilnathan, S.; Arulmurugan, R.

doi:10.1016/j.jmmm.2007.01.010

Cited by 159 publications

(71 citation statements)

References 28 publications

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“…Magnetic parameters, such as saturation magnetization (M s ), remanent magnetization (M r ) and coercive field (H c ), were found to vary with zinc content and are shown in Table 1. The values are in agreement with the literature [19]. Moreover, saturation magnetization of bulk cobalt ferrite is 65 emu/g [20].…”

Section: Magnetic Measurementssupporting

confidence: 91%

Study of Faraday effect on Co1-xZnxFe2O4 nanoferrofluids

Karthick¹,

Ramachandran²,

Ramanathan³

2016

Nanosystems: Phys. Chem. Math.

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Zinc doped cobalt ferriteCo 1−x ZnxFe 2 O 4 nanoparticles (x = 0.1, 0.5, 0.9) were synthesized by chemical co-precipitation method. The crystallite size, which was calculated from the full width half maximum (FWHM) value of the strongest peak (311) plane using Scherer approximation, was found to decrease with higher zinc content. The surface morphology of the powder samples was obtained using transmission electron microscopy (TEM). Magnetic properties, such as Saturation magnetization (Ms), Remanent Magnetization (Mr) and Coercivity of the powder samples, were measured using Vibrating Sample Magnetometer (VSM) at room temperature and were found to decrease with increased zinc content. Aqueous ferrofluids prepared from the powder samples were subjected to magnetic field to measure their Faraday rotation. Faraday rotation of the ferrofluids was found to increase with applied magnetic field and decrease with increasing zinc composition.

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Section: Magnetic Measurementssupporting

confidence: 91%

Study of Faraday effect on Co1-xZnxFe2O4 nanoferrofluids

Karthick¹,

Ramachandran²,

Ramanathan³

2016

Nanosystems: Phys. Chem. Math.

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“…The reverse micro-emulsion technique allows the control over both shape and size via the structure of the surfactant assemblies. This is a technique, which allows the preparation of ultrafine nano-particles within the particle diameter of 1-100 nm (Vaidyanathan et al 2007). The reverse micro-emulsion solutions are mostly transparent, isotropic liquid media with nano-sized water droplets that are dispersed in the continuous oil phase and stabilized by surfactant molecules at the water/oil interface.…”

Section: Resultsmentioning

confidence: 99%

Study of structure and magnetic properties of Ni–Zn ferrite nano-particles synthesized via co-precipitation and reverse micro-emulsion technique

et al. 2013

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Nano-crystalline Ni-Zn ferrites were synthesized by chemical co-precipitation and reverse microemulsion technique with an average crystallite size of 11 and 6 nm, respectively. The reverse micro-emulsion method has been found to be more appropriate for nanoferrite synthesis as the produced particles are monodisperse and highly crystalline. Zero-field cooled and field cooled magnetization study under different magnetic fields and magnetic hysteresis loops at different temperatures have been performed. The non-saturated M-H loops, absence of hysteresis, and coercivity at room temperature are indicative of the presence of super paramagnetic and singledomain nano-particles for both the materials. In sample 'a', the blocking temperature (T B ) has been observed to decrease from 255 to 120 K on increasing the magnetic field from 50 to 1,000 Oe, which can be attributed to the reduction of magneto crystalline anisotropy constant. The M S and coercivity were found to be higher for sample 'a' as compared with sample 'b' since surface effects are neglected on increasing the crystallite size.

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“…Vaidyanathan et al [8] also reported decrease in magnetic properties such as M s , H s , H c , and M r with increase in zinc substitution. Single phase and monodispersed nanocrystalline Zn-substituted Cobalt ferrites with grain size of 3 nm were prepared by Duong et al [9] using forced hydrolysis method and found that the ferrites were super paramagnetic at room temperature and ferrimagnetic at lower temperatures.…”

Section: Introductionmentioning

confidence: 93%