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

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

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dc.contributor.author Swapna S, Nair
dc.contributor.author Rajesh, S
dc.contributor.author Abraham, V S
dc.contributor.author Anantharaman, M R
dc.contributor.author Nampoori, V P N
dc.date.accessioned 2011-12-02T08:48:19Z
dc.date.available 2011-12-02T08:48:19Z
dc.date.issued 2006
dc.identifier.issn 0304-8853
dc.identifier.other Journal of Magnetism and Magnetic Materials 305 (2006) 28–34
dc.identifier.uri http://dyuthi.cusat.ac.in/purl/2588
dc.description.abstract Fine magnetic particles (size≅100 Å) belonging to the series ZnxFe1−xFe2O4 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. en_US
dc.description.sponsorship Cochin University of Science and Technology & International University of Bremen en_US
dc.language.iso en en_US
dc.publisher Elsevier en_US
dc.subject Ferrofluids en_US
dc.subject HEBM en_US
dc.subject Zinc ferrite en_US
dc.subject Field-induced assembling en_US
dc.subject Magneto-optics en_US
dc.title Magnetic field-induced cluster formation and variation of magneto-optical signals in zinc-substituted ferrofluids en_US
dc.type Working Paper en_US
dc.contributor.faculty Technology en_US
dc.identifier.url http://www.sciencedirect.com/science/article/pii/S0304885305011431" en_US


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