Enchancment in viscoelastic properties of flake-shaped iron based magnetorheological fluid using ferrofluid

Jahan, Noor; Pathak, Saurabh; Jain, Komal

doi:10.1016/j.colsurfa.2017.05.057

Cited by 58 publications

(45 citation statements)

References 19 publications

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“…The nite-size effect shows a noncollinearity (spin canting) in the spinel structure (tetrahedral, A site, S A and octahedral, B site S B ) that results in a decrease in the net magnetic moment. 7,27,29 This is in accordance with the two-sublattice Néel model, dened as the difference between the moments of the A sublattice and B sublattice. The increase in the particle size favoured the increase in the collinearity of spins (S A and S B ) in the ferrimagnetic structure, which enhanced the saturation magnetization at higher annealing temperatures.…”

Section: Static Magnetic Measurement Using Vsmsupporting

confidence: 84%

Microwave spin resonance investigation on the effect of the post-processing annealing of CoFe₂O₄ nanoparticles

et al. 2020

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Section: Static Magnetic Measurement Using Vsmsupporting

confidence: 84%

Microwave spin resonance investigation on the effect of the post-processing annealing of CoFe₂O₄ nanoparticles

et al. 2020

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“…However, in the XRD pattern of FZC (Fig. 2(c) 27 . From the XRD patterns, we have observed that the optimized concentration of FN in nanocomposite does not affect the structural properties significantly and appears as a separate phase.…”

Section: Resultsmentioning

confidence: 98%

Spin dynamics investigations of multifunctional ambient scalable Fe3O4 surface decorated ZnO magnetic nanocomposite using FMR

Pathak

Verma

Singhal

et al. 2021

Sci Rep

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Microwave spin resonance behavior of the Fe3O4 surface decorated ZnO nanocomposites (FZNC) has been investigated by ferromagnetic resonance (FMR). Modified hydrothermal method has been adopted to fabricate FZNC samples with Fe3O4 nanoparticles chains were used as seeds in the uniform magnetic field to decorate them on the surface of the ZnO nanoparticles in a unique configuration. Spin dynamics investigation confirms the transition of ZnO from diamagnetic to ferromagnetic as the sharp FMR spectra converts to the broad spectra with Fe3O4 nanoparticles incorporation. A single broad FMR spectra confirms that no isolated Fe3+ or Zn2+ ions exist which is also in agreement with XRD confirming suitable composite formation. Further, the increase in Fe3O4 concentration leads to decrease in g-value which is resulting from the internal field enhancement due to magnetic ordering. Also, various spin resonance parameters were calculated for the FZNC which provides a detail information about the magnetic ordering, exchange coupling and anisotropy. Elemental analysis confirms the presence of Fe and Zn simultaneously and transmission electron microscopy (TEM) image show the presence of Fe3O4 on the grain boundaries of ZnO which has been confirmed by taking high-resolution TEM and electron diffraction patterns on both sides of the interface. These unique structural configuration of the FZNC has tremendous potential in various magneto-optoelectronic, spintronics and electro-chemical applications.

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“…Therefore, higher force is required for the particles to flow against the medium to form chain structures with the presence of shear rate and magnetic field. This can be seen clearly through the reduction of the void between CI particles [42]. A significant void reduction in the plate-like CI particles is expected compared to the spherical CI particles, owing to the larger diameter of anisotropy shape.…”

Section: Resultsmentioning

confidence: 99%

“…Based on authors’ previous studies, the average diameter for the plate-like and spherical CI particles are 6.2 µm and 5 µm, respectively [33]. Theoretically, the small-diameter spherical CI particles are inclined to fill the void between the larger plate-like CI particles in the grease medium [42]. In this study, it is believed that the small diameter of spherical CI particles is adsorbed on the rough surface of larger plate-like CI particles, which are favour orientation in bedding plane.…”

Section: Resultsmentioning

confidence: 99%

The Effect of Particle Shapes on the Field-Dependent Rheological Properties of Magnetorheological Greases

Mohamad

Ubaidillah

Mazlan

et al. 2019

IJMS

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The transient response of magnetorheological (MR) materials, in general, is very important for design consideration in MR-based devices. Better response to magnetic fields is beneficial for a better response rate to the electrical current applied in the electromagnetic coil. As a result, MR-based devices would have a high response to external stimuli. In this work, the principal characteristics of magnetorheological greases (MRGs) which have two different particle shapes are experimentally investigated. One type of particle distributed in the grease medium is conventional spherical-shaped carbonyl iron (CI) particles, while the other is plate-like CI particles made using a high-energy rotary ball mill from spherical CI particles. A set of bidisperse MRG samples are firstly prepared by adjusting the weight percentage of the plate-like CI particles and mixing with the spherical CI particles. Subsequently, three important properties of MRGs in terms of their practical application are measured and compared between the two different particle shapes. The field-dependent apparent viscoelastic properties of the prepared MRG samples are measured, followed by the field-dependent storage and loss moduli using an oscillatory shear rheometer. In addition, the transient response time, which indicates the speed in the actuating period of MRGs, is measured by changing the strain amplitude. Then, a comparative assessment on the three properties are undertaken between two different particle shapes by presenting the corresponding results in the same plot. It is shown that the bidisperse MRG with plate-like CI particles exhibits an increase in the initial apparent viscosity as well as stiffness property compared to the MRG with spherical particles only.

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Enchancment in viscoelastic properties of flake-shaped iron based magnetorheological fluid using ferrofluid

Cited by 58 publications

References 19 publications

Microwave spin resonance investigation on the effect of the post-processing annealing of CoFe₂O₄ nanoparticles

Microwave spin resonance investigation on the effect of the post-processing annealing of CoFe₂O₄ nanoparticles

Spin dynamics investigations of multifunctional ambient scalable Fe3O4 surface decorated ZnO magnetic nanocomposite using FMR

The Effect of Particle Shapes on the Field-Dependent Rheological Properties of Magnetorheological Greases

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Enchancment in viscoelastic properties of flake-shaped iron based magnetorheological fluid using ferrofluid

Cited by 58 publications

References 19 publications

Microwave spin resonance investigation on the effect of the post-processing annealing of CoFe2O4 nanoparticles

Microwave spin resonance investigation on the effect of the post-processing annealing of CoFe2O4 nanoparticles

Spin dynamics investigations of multifunctional ambient scalable Fe3O4 surface decorated ZnO magnetic nanocomposite using FMR

The Effect of Particle Shapes on the Field-Dependent Rheological Properties of Magnetorheological Greases

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Microwave spin resonance investigation on the effect of the post-processing annealing of CoFe₂O₄ nanoparticles

Microwave spin resonance investigation on the effect of the post-processing annealing of CoFe₂O₄ nanoparticles