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Study of Additive Effects on the Structural, Magnetic Properties and Mössbauer Spectroscopic Analysis of Cobalt Cadmium Ferrites

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dc.contributor.advisor Sikdcr, Prof. Dr. Shibendra Shekhcr
dc.contributor.author Islam, Md. Torikul
dc.date.accessioned 2018-08-30T04:02:48Z
dc.date.available 2018-08-30T04:02:48Z
dc.date.copyright 2014
dc.date.issued 2014-02
dc.identifier.other ID 1055552
dc.identifier.uri http://hdl.handle.net/20.500.12228/437
dc.description This thesis is submitted to the Department of Physics, Khulna University of Engineering & Technology in partial fulfillment of the requirements for the degree of Master of Philosophy in Physics, February 2014. en_US
dc.description Cataloged from PDF Version of Thesis.
dc.description Includes bibliographical references (pages 123-133).
dc.description.abstract The present work is focused on the structural, magnetic properties and Mössbauer spectroscopic analysis of Co-Cd ferrites. The ferrite samples of the compositions Co1-x CdxFe2O4 (where x=0.0, 0.1, 0.3, 0.4 and 0.5) were prepared by using the solid state reaction technique. The phase identification was carried out by using the X-ray diffraction (XRD). The XRD analysis revealed that all the samples were found to crystallize in single phase cubic spinel structure. The lattice constant of Co1-x CdxFe2O4 ferrites increases linearly with the increase Cd-content, followed Vegard's law. Bulk density and X-ray density significantly increase with the increase of Cd- content. Curie temperature (Tc) decreases almost linearly with increasing Cd-content. Initial permeability was found to increase with Cd-content at constant sintering temperature which may be attributed to enhanced density and reduced anisotropy energy as well as increase in grain size of the studied samples. The permeability spectrum with frequency follows the Snoek's limit. Saturation magnetization (Ms) increases with Cd-content with high value of 49 emu/g for x =0.5 emu/g. All Co-Cd ferrites have been investigated using Mössbauer spectroscopy. The Mössbauer measurements were performed with a conventional constant acceleration spectrometer at room temperature in transmission geometry, using 57Co in a rhodium matrix. The velocity scale of a thin 57Fe sample and the isomer shifts are given relative to the centroid of the spectrum. The isomer shifts of Fe atoms in all Co-Cd ferrites sample behave trivalent ions. The spectrum for the Co1-x CdxFe2O4 ferrites consists of six lines which are broad as compared with Mössbauer spectrum of a pure 57Fe samples in the form of a thin foil up to x = 0.5. After x ≥ 0.6, Co-Cd ferrites consists a paramagnetic doublet, reflecting a severe chemical disorder. One of the magnetic signals is a sextet typical of those associated with a good magnetic order at room temperature. en_US
dc.description.statementofresponsibility Md. Torikul Islam
dc.format.extent 134 pages
dc.language.iso en_US en_US
dc.publisher Khulna University of Engineering & Technology (KUET), Khulna, Bangladesh. en_US
dc.rights Khulna University of Engineering & Technology (KUET) thesis/dissertation/internship reports are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission.
dc.subject Cobalt Cadmium Ferrites en_US
dc.subject Mössbauer Spectroscopic en_US
dc.subject Magnetic Properties en_US
dc.title Study of Additive Effects on the Structural, Magnetic Properties and Mössbauer Spectroscopic Analysis of Cobalt Cadmium Ferrites en_US
dc.type Thesis en_US
dc.description.degree Master of Philosophy in Physics
dc.contributor.department Department of Physics


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