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Structural and magnetic properties of Co-Al substituted Ni ferrites synthesized by co-precipitation method

Controlled growth and careful characterizations of nanocrystalline Ni ferrites are demanding for high density recording media. Ferrites of the form Ni((1-x))CoxFe2-x AlxO4 (where x = 0.0, 0.2, 0.4, 0.6 and 0.8) are prepared by the co-precipitation method. The process is investigated with simultaneou...

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Main Authors: Ati, Ali A., Othaman, Zulkafli, Samavati, Alireza, Doust, Fatemeh Yaghoubi
Format: Article
Published: Elsevier 2014
Subjects:
Q Science
Online Access:http://eprints.utm.my/id/eprint/62689/
http://dx.doi.org/10.1016/j.molstruc.2013.10.042
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spelling my.utm.626892017-06-05T01:55:59Z http://eprints.utm.my/id/eprint/62689/ Structural and magnetic properties of Co-Al substituted Ni ferrites synthesized by co-precipitation method Ati, Ali A. Othaman, Zulkafli Samavati, Alireza Doust, Fatemeh Yaghoubi Q Science Controlled growth and careful characterizations of nanocrystalline Ni ferrites are demanding for high density recording media. Ferrites of the form Ni((1-x))CoxFe2-x AlxO4 (where x = 0.0, 0.2, 0.4, 0.6 and 0.8) are prepared by the co-precipitation method. The process is investigated with simultaneous thermogravimetric-differential thermal analysis (TG-DTA). The FESEM images display the nanostructural features of the samples with Gaussian distribution and the XRD analysis confirm the formation of single spinet phase with mean particle size 15-19 nm. Our results suggest that these crystallites are small enough to obtain the suitable signal-to-noise ratio appropriate in the high density recording media. The wide variation of saturation magnetization (M-s), remanence (M-r) and coercivity (H-c) evidenced in the range of 31.02-45.56 emu/g, 12.74-19.80 emu/g and 56-563 Oe, respectively are promising for diversified applications. The conduction mechanism is understood using complex impedance measurements. Our simple and economic preparation method may constitute a basis for the production of large scale high quality Ni ferrite nanopowders useful for memory devices. Elsevier 2014 Article PeerReviewed Ati, Ali A. and Othaman, Zulkafli and Samavati, Alireza and Doust, Fatemeh Yaghoubi (2014) Structural and magnetic properties of Co-Al substituted Ni ferrites synthesized by co-precipitation method. Journal of Molecular Structure, 1058 . pp. 136-141. ISSN 0022-2860 http://dx.doi.org/10.1016/j.molstruc.2013.10.042 DOI:10.1016/j.molstruc.2013.10.042
institution Universiti Teknologi Malaysia
building UTM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Teknologi Malaysia
content_source UTM Institutional Repository
url_provider http://eprints.utm.my/
topic Q Science
spellingShingle Q Science
Ati, Ali A.
Othaman, Zulkafli
Samavati, Alireza
Doust, Fatemeh Yaghoubi
Structural and magnetic properties of Co-Al substituted Ni ferrites synthesized by co-precipitation method
description Controlled growth and careful characterizations of nanocrystalline Ni ferrites are demanding for high density recording media. Ferrites of the form Ni((1-x))CoxFe2-x AlxO4 (where x = 0.0, 0.2, 0.4, 0.6 and 0.8) are prepared by the co-precipitation method. The process is investigated with simultaneous thermogravimetric-differential thermal analysis (TG-DTA). The FESEM images display the nanostructural features of the samples with Gaussian distribution and the XRD analysis confirm the formation of single spinet phase with mean particle size 15-19 nm. Our results suggest that these crystallites are small enough to obtain the suitable signal-to-noise ratio appropriate in the high density recording media. The wide variation of saturation magnetization (M-s), remanence (M-r) and coercivity (H-c) evidenced in the range of 31.02-45.56 emu/g, 12.74-19.80 emu/g and 56-563 Oe, respectively are promising for diversified applications. The conduction mechanism is understood using complex impedance measurements. Our simple and economic preparation method may constitute a basis for the production of large scale high quality Ni ferrite nanopowders useful for memory devices.
format Article
author Ati, Ali A.
Othaman, Zulkafli
Samavati, Alireza
Doust, Fatemeh Yaghoubi
author_facet Ati, Ali A.
Othaman, Zulkafli
Samavati, Alireza
Doust, Fatemeh Yaghoubi
author_sort Ati, Ali A.
title Structural and magnetic properties of Co-Al substituted Ni ferrites synthesized by co-precipitation method
title_short Structural and magnetic properties of Co-Al substituted Ni ferrites synthesized by co-precipitation method
title_full Structural and magnetic properties of Co-Al substituted Ni ferrites synthesized by co-precipitation method
title_fullStr Structural and magnetic properties of Co-Al substituted Ni ferrites synthesized by co-precipitation method
title_full_unstemmed Structural and magnetic properties of Co-Al substituted Ni ferrites synthesized by co-precipitation method
title_sort structural and magnetic properties of co-al substituted ni ferrites synthesized by co-precipitation method
publisher Elsevier
publishDate 2014
url http://eprints.utm.my/id/eprint/62689/
http://dx.doi.org/10.1016/j.molstruc.2013.10.042
_version_ 1643655494014861312
score 13.211869

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