Magnetic properties of laboratory synthesized magnetic fluid and their temperature dependence

Mehta, R. V.; Upadhyay, R. V.; Dasannacharya, B.A.; Goyal, P. S.; Rao, K. Sandeep

doi:10.1016/0304-8853(94)90309-3

Cited by 22 publications

(6 citation statements)

References 14 publications

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“…Among the various classes of nanomaterials, metal oxides are the common, most diverse and possess richest class in terms of physical, chemical and structural properties. As a result, numerous applications of metal oxides, such as fabrication of microelectronic circuits, sensors, piezoelectric devices, fuel cells, dielectrics, lasers, magnets and catalysts have been discussed [1][2][3][4][5][6][7][8][9][10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and morphological study of chromium substituted Zn–Mn ferrites nanostructures via sol–gel method

Hankare

Patil

Sankpal

et al. 2011

Journal of Alloys and Compounds

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Section: Introductionmentioning

confidence: 99%

Synthesis and morphological study of chromium substituted Zn–Mn ferrites nanostructures via sol–gel method

Hankare

Patil

Sankpal

et al. 2011

Journal of Alloys and Compounds

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“…Ferrites, the transition metal oxides having a spinel structure, are used in magnetic inks and magnetic fluids and for the fabrication of magnetic cores of read/write heads for high-speed digital tapes or for disk recording . One important example is the electrically conductive manganese oxide, which stores electrical charge by a double insertion of electrons and cations into the solid state .…”

Section: Introductionmentioning

confidence: 99%

Mixed Iron−Manganese Oxide Nanoparticles

et al. 2004

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Designing nanoparticles for practical applications requires knowledge and control of how their desired properties relate to their composition and structure. Here, we present a detailed systematic study of mixed iron-manganese oxide nanoparticles, showing that ultrasonication provides the high-energy reaction conditions required for complete atomic level mixing of Fe(III) and Mn(III) when amorphous Fe 2 O 3 nanoparticles are irradiated in the presence of Mn 2 (CO) 10 in ambient atmosphere. X-ray diffraction (XRD) results reveal that the crystal structure of manganese iron mixed oxide nanoparticles changes from spinel to bixbyite with increasing of Mn(III) content. The results of room-temperature magnetization curves are consistent with the XRD patterns and spin density from electron paramagnetic resonance measurements, showing samples converting from superparamagnetic to antiferromagnetic, when the crystal structures of these samples transform from spinel to bixbyite.

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“…Ferrites−the transition metal oxides having a spinel structure−are technologically important because of their interesting magnetic and electrical properties. They are used in magnetic inks and magnetic fluids and for the fabrication of magnetic cores of read/write heads for high-speed digital tapes or for disc recording . Nanostructured materials are now being studied intensively due to their novel physicochemical properties, which are quite different from those of the bulk materials. , A variety of methods have been used to prepare nanosized ferrite particles.…”

Section: Introductionmentioning

confidence: 99%

Sonochemical Preparation and Size-Dependent Properties of Nanostructured CoFe₂O₄ Particles

et al. 1998

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Nanostructured CoFe 2 O 4 particles were prepared by a sonochemical approach, first by preparation of the amorphous precursor powders, followed by heat treatment at relatively very low temperatures. The precursor was prepared by sonochemical decomposition of solutions of volatile organic precursors, Fe(CO) 5 and Co(NO)(CO) 3 , in Decalin at 273 K, under an oxygen pressure of 100-150 kPa. The amorphous nature of these particles was confirmed by various techniques, such as scanning and transmission electron microscopy (SEM and TEM), electron microdiffraction, and X-ray diffractograms. Magnetic measurements, Mo ¨ssbauer, and electron paramagnetic resonance (EPR) spectral studies indicated that the as-prepared amorphous particles were superparamagnetic. The Mo ¨ssbauer parameters and the significantly low (45 emu/g) observed saturation of magnetization of the annealed sample, compared to that of the bulk sample (72 emu/g), reflected its nanocrystalline nature.

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Magnetic properties of laboratory synthesized magnetic fluid and their temperature dependence

Cited by 22 publications

References 14 publications

Synthesis and morphological study of chromium substituted Zn–Mn ferrites nanostructures via sol–gel method

Synthesis and morphological study of chromium substituted Zn–Mn ferrites nanostructures via sol–gel method

Mixed Iron−Manganese Oxide Nanoparticles

Sonochemical Preparation and Size-Dependent Properties of Nanostructured CoFe₂O₄ Particles

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Magnetic properties of laboratory synthesized magnetic fluid and their temperature dependence

Cited by 22 publications

References 14 publications

Synthesis and morphological study of chromium substituted Zn–Mn ferrites nanostructures via sol–gel method

Synthesis and morphological study of chromium substituted Zn–Mn ferrites nanostructures via sol–gel method

Mixed Iron−Manganese Oxide Nanoparticles

Sonochemical Preparation and Size-Dependent Properties of Nanostructured CoFe2O4 Particles

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Product

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Sonochemical Preparation and Size-Dependent Properties of Nanostructured CoFe₂O₄ Particles