Magnetic electrical transport and impedance spectroscopy studies on Ti Substituted La0.67Sr0.33MnO3 ceramics

La0.67Sr0.33Mn1-xTixO3 samples with x = 0.0, 0.2, 0.4 and 0.6 have been prepared using the conventional solid-state reaction method. The structure, magnetic and electrical transport properties as well as the impedance spectroscopy of the samples were investigated. The powder XRD analysis showed that...

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Main Authors:	Zalita Zainuddin, Abdul Halim Shaari, Lim , Kean Pah, Zainal Abidin Talib, Hishamuddin Zainuddin, Walter Charles Primus
Format:	Article
Published:	Universiti Kebangsaan Malaysia 2009
Online Access:	http://journalarticle.ukm.my/27/ http://journalarticle.ukm.my/27/

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spelling	oai:generic.eprints.org:272011-11-25T07:13:55Z http://journalarticle.ukm.my/27/ Magnetic electrical transport and impedance spectroscopy studies on Ti Substituted La0.67Sr0.33MnO3 ceramics Zalita Zainuddin, Abdul Halim Shaari, Lim , Kean Pah Zainal Abidin Talib, Hishamuddin Zainuddin, Walter Charles Primus, La0.67Sr0.33Mn1-xTixO3 samples with x = 0.0, 0.2, 0.4 and 0.6 have been prepared using the conventional solid-state reaction method. The structure, magnetic and electrical transport properties as well as the impedance spectroscopy of the samples were investigated. The powder XRD analysis showed that all samples were single phase with rhombohedral perovskite structure. The magnetization curve suggests that the Ti substituted samples exhibit weak ferromagnetic behaviour. The highest magnetoresistance (MR) value was obtained for sample x = 0.2 at temperature 200 K and field 1 T, which was 32.5%. Low field magnetoresistance (LFMR) effect was observed for the x = 0.0 sample. The metal-like resistivity curve for the x = 0.0 sample was best fitted with ρ = ρo + ρ2T2 equation, indicating the grain boundary effects and electron-electron scattering process contribution. Semiconductor-like transport behaviour was observed for the Ti substituted samples and can be fitted by variable range hopping (VRH) and small polaron hopping (SPH) mechanisms. The activation energy of the samples increased when the Ti composition increased. An equivalent circuit was proposed for the impedance plot with a series of two parallel RC circuits. The grain, grain boundary and electrode resistance values increased with Ti composition due to the reduction of the Mn3+ / Mn4+ ratio. Universiti Kebangsaan Malaysia 2009-10 Article PeerReviewed Zalita Zainuddin, and Abdul Halim Shaari, and Lim , Kean Pah and Zainal Abidin Talib, and Hishamuddin Zainuddin, and Walter Charles Primus, (2009) Magnetic electrical transport and impedance spectroscopy studies on Ti Substituted La0.67Sr0.33MnO3 ceramics. Sains Malaysiana, 38 (5). pp. 673-678. ISSN 0126-6039 http://www.ukm.my/~jsm/contents.html
repository_type	Digital Repository
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institution	Universiti Kebangasaan Malaysia
building	UKM Institutional Repository
collection	Online Access
description	La0.67Sr0.33Mn1-xTixO3 samples with x = 0.0, 0.2, 0.4 and 0.6 have been prepared using the conventional solid-state reaction method. The structure, magnetic and electrical transport properties as well as the impedance spectroscopy of the samples were investigated. The powder XRD analysis showed that all samples were single phase with rhombohedral perovskite structure. The magnetization curve suggests that the Ti substituted samples exhibit weak ferromagnetic behaviour. The highest magnetoresistance (MR) value was obtained for sample x = 0.2 at temperature 200 K and field 1 T, which was 32.5%. Low field magnetoresistance (LFMR) effect was observed for the x = 0.0 sample. The metal-like resistivity curve for the x = 0.0 sample was best fitted with ρ = ρo + ρ2T2 equation, indicating the grain boundary effects and electron-electron scattering process contribution. Semiconductor-like transport behaviour was observed for the Ti substituted samples and can be fitted by variable range hopping (VRH) and small polaron hopping (SPH) mechanisms. The activation energy of the samples increased when the Ti composition increased. An equivalent circuit was proposed for the impedance plot with a series of two parallel RC circuits. The grain, grain boundary and electrode resistance values increased with Ti composition due to the reduction of the Mn3+ / Mn4+ ratio.
format	Article
author	Zalita Zainuddin, Abdul Halim Shaari, Lim , Kean Pah Zainal Abidin Talib, Hishamuddin Zainuddin, Walter Charles Primus,
spellingShingle	Zalita Zainuddin, Abdul Halim Shaari, Lim , Kean Pah Zainal Abidin Talib, Hishamuddin Zainuddin, Walter Charles Primus, Magnetic electrical transport and impedance spectroscopy studies on Ti Substituted La0.67Sr0.33MnO3 ceramics
author_facet	Zalita Zainuddin, Abdul Halim Shaari, Lim , Kean Pah Zainal Abidin Talib, Hishamuddin Zainuddin, Walter Charles Primus,
author_sort	Zalita Zainuddin,
title	Magnetic electrical transport and impedance spectroscopy studies on Ti Substituted La0.67Sr0.33MnO3 ceramics
title_short	Magnetic electrical transport and impedance spectroscopy studies on Ti Substituted La0.67Sr0.33MnO3 ceramics
title_full	Magnetic electrical transport and impedance spectroscopy studies on Ti Substituted La0.67Sr0.33MnO3 ceramics
title_fullStr	Magnetic electrical transport and impedance spectroscopy studies on Ti Substituted La0.67Sr0.33MnO3 ceramics
title_full_unstemmed	Magnetic electrical transport and impedance spectroscopy studies on Ti Substituted La0.67Sr0.33MnO3 ceramics
title_sort	magnetic electrical transport and impedance spectroscopy studies on ti substituted la0.67sr0.33mno3 ceramics
publisher	Universiti Kebangsaan Malaysia
publishDate	2009
url	http://journalarticle.ukm.my/27/ http://journalarticle.ukm.my/27/
first_indexed	2018-09-07T08:44:48Z
last_indexed	2018-09-07T08:44:48Z
_version_	1610937678160723968

Magnetic electrical transport and impedance spectroscopy studies on Ti Substituted La0.67Sr0.33MnO3 ceramics

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