Influence of magnetic anisotropy constant and particle domain magnetization on magneto-dielectric response of substituted manganese ferrite particles dispersed in kerosene

Sutariya, G.M.; Siblini, Ali; Blanc-Mignon, M.-F.; Jorat, L.; Parekh, Kinnari; Upadhyay, R. V.; Mehta, R. V.; Noyel, G.

doi:10.1016/s0304-8853(01)00192-5

Cited by 3 publications

(3 citation statements)

References 13 publications

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“…Fine particle precursors belonging to the series Zn x Fe 1Àx Fe 2 O 4 were synthesized by the cold co-precipitation of the aqueous solutions of ZnSO 4 Á 7H 2 O, FeSO 4 Á 7H 2 O and FeCl 3 were taken in the appropriate molar ratio [18][19][20].…”

Section: Preparation Of Magnetic Fine Particlesmentioning

confidence: 99%

Magnetic field-induced cluster formation and variation of magneto-optical signals in zinc-substituted ferrofluids

Nair

Rajesh

Abraham

et al. 2006

Journal of Magnetism and Magnetic Materials

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Fine magnetic particles (sizeffi100 Å ) belonging to the series Zn x Fe 1Àx Fe 2 O 4 were synthesized by cold co-precipitation methods and their structural properties were evaluated using X-ray diffraction. Magnetization studies have been carried out using vibrating sample magnetometry (VSM) showing near-zero loss loop characteristics. Ferrofluids were then prepared employing these fine magnetic powders using oleic acid as surfactant and kerosene as carrier liquid by modifying the usually reported synthesis technique in order to induce anisotropy and enhance the magneto-optical signals. Liquid thin films of these fluids were prepared and field-induced laser transmission through these films was studied. The transmitted light intensity decreases at the centre with applied magnetic field in a linear fashion when subjected to low magnetic fields and saturate at higher fields. This is in accordance with the saturation in cluster formation. The pattern exhibited by these films in the presence of different magnetic fields was observed with the help of a CCD camera and was recorded photographically. r

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Section: Preparation Of Magnetic Fine Particlesmentioning

confidence: 99%

Magnetic field-induced cluster formation and variation of magneto-optical signals in zinc-substituted ferrofluids

Nair

Rajesh

Abraham

et al. 2006

Journal of Magnetism and Magnetic Materials

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“…Fine particles of nickel iron ferrite, which are the precursor material for the preparation of the ferrofluids, were synthesized by cold co-precipitation. For this, NiSO 4 ⋅6H 2 O, FeSO 4 ⋅7H 2 O and FeCl 3 (all AR grade chemicals) in the molar ratio of x M, (1-x) M, and 2 M were employed (Morosov et al 1987;Sutharia et al 2001;Wu et al 2001).…”

Section: Preparation Of Magnetic Fine Particlesmentioning

confidence: 99%

Magnetic field induced assembling of nanoparticles in ferrofluidic liquid thin films based on Ni x Fe1−x Fe2O4

et al. 2004

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Ultra fine precursors for ferrofluid synthesis, belonging to the series, Ni x Fe 1-x Fe 2 O 4 (where 'x' varies from '0' to '0⋅ ⋅6' in steps of 0⋅ ⋅1), were synthesized. Ferrofluids based on these fine particles were prepared with oleic acid as surfactant and kerosene as carrier. Ferrofluidic thin films were made on glass substrates and magnetic field induced laser transmission was studied. The pattern exhibited by the films under the influence of a magnetic field was observed with the help of a CCD camera. The analysis of results confirms the chain formation of particles in the presence of an applied magnetic field and their saturation at higher applied fields. Keywords. Ferrofluids; nickel ferrite; field induced assembling; ultra fine particles.

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“…The effects of aggregation and shape anisotropy are also discussed. [9], with oleic acid as the surfactant. The obtained wet slurry was then successfully dispersed in kerosene with a known volume fraction to obtain ferrofluids of desired concentration.…”

Section: Introductionmentioning

confidence: 99%

Enhanced shape anisotropy and magneto-optical birefringence by high energy ball milling in NixFe1−xFe2O4 ferrofluids

Nair

Xavier

Joy

et al. 2008

Journal of Magnetism and Magnetic Materials

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Ferrofluids belonging to the series Ni x Fe 1Àx Fe 2 O 4 were synthesised by two different procedures-one by standard co-precipitation techniques, the other by co-precipitation for synthesis of particles and dispersion aided by high-energy ball milling with a view to understand the effect of strain and size anisotropy on the magneto-optical properties of ferrofluids. The birefringence measurements were carried out using a standard ellipsometer. The birefringence signal obtained for chemically synthesised samples was satisfactorily fitted to the standard second Langevin function. The ball-milled ferrofluids showed a deviation and their birefringence was enhanced by an order. This large enhancement in the birefringence value cannot be attributed to the increase in grain size of the samples, considering that the grain sizes of sample synthesised by both modes are comparable; instead, it can be attributed to the lattice strain-induced shape anisotropy(oblation) arising from the high-energy ball-milling process. Thus magnetic-optical (MO) signals can be tuned by ball-milling process, which can find potential applications. r

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Influence of magnetic anisotropy constant and particle domain magnetization on magneto-dielectric response of substituted manganese ferrite particles dispersed in kerosene

Cited by 3 publications

References 13 publications

Magnetic field-induced cluster formation and variation of magneto-optical signals in zinc-substituted ferrofluids

Magnetic field-induced cluster formation and variation of magneto-optical signals in zinc-substituted ferrofluids

Magnetic field induced assembling of nanoparticles in ferrofluidic liquid thin films based on Ni x Fe1−x Fe2O4

Enhanced shape anisotropy and magneto-optical birefringence by high energy ball milling in NixFe1−xFe2O4 ferrofluids

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