Electrical and magneto-transport properties of magneto-resistive la0.7Ca0.28Sr0.2 MnO3 prepared at different sintering temperature

The effects of strontium doping on the electrical and magneto-transport properties of magneto resistive La0.7Ca0.28Sr0.02MnO3 at different sintering temperatures have been studied. The samples were prepared by the co-precipitation technique (COP) and sintered at 1120, 1220 and 1320 oC. XRD patterns...

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Main Authors:	Ewe, L.S, Ramli, R, Lim, K.P, Abd-Shukor, R
Format:	Article
Language:	English
Published:	Universiti Kebangsaan Malaysia 2012
Online Access:	http://journalarticle.ukm.my/4864/ http://journalarticle.ukm.my/4864/ http://journalarticle.ukm.my/4864/1/14%2520L.S%2520EWe.pdf

id	ukm-4864
recordtype	eprints
spelling	ukm-48642016-12-14T06:37:09Z http://journalarticle.ukm.my/4864/ Electrical and magneto-transport properties of magneto-resistive la0.7Ca0.28Sr0.2 MnO3 prepared at different sintering temperature Ewe, L.S Ramli, R Lim, K.P Abd-Shukor, R The effects of strontium doping on the electrical and magneto-transport properties of magneto resistive La0.7Ca0.28Sr0.02MnO3 at different sintering temperatures have been studied. The samples were prepared by the co-precipitation technique (COP) and sintered at 1120, 1220 and 1320 oC. XRD patterns revealed that the samples have an orthorhombic structure and the diffraction patterns can be indexed with the Pbnm space group. The insulator metal transition, TIM increased linearly from 261 K to 272 K with the increase in sintering temperature. The magnetoresistance (MR) measurements were made in magnetic fields from 0.1 to 1 T at room temperature. The percentage of MR increased with increasing of magnetic field and sintering temperature for all samples. The electrical resistivity data were fitted with several equations in the metallic (ferromagnetic) and insulator (paramagnetic) regime. The density of states at the Fermi level N(EF) and the activation energy (Ea) of electron hopping were estimated by using variable range hopping and small polaron hopping model. Universiti Kebangsaan Malaysia 2012-06 Article PeerReviewed application/pdf en http://journalarticle.ukm.my/4864/1/14%2520L.S%2520EWe.pdf Ewe, L.S and Ramli, R and Lim, K.P and Abd-Shukor, R (2012) Electrical and magneto-transport properties of magneto-resistive la0.7Ca0.28Sr0.2 MnO3 prepared at different sintering temperature. Sains Malaysiana, 41 (6). pp. 761-768. ISSN 0126-6039 http://www.ukm.my/jsm/contents.html
repository_type	Digital Repository
institution_category	Local University
institution	Universiti Kebangasaan Malaysia
building	UKM Institutional Repository
collection	Online Access
language	English
description	The effects of strontium doping on the electrical and magneto-transport properties of magneto resistive La0.7Ca0.28Sr0.02MnO3 at different sintering temperatures have been studied. The samples were prepared by the co-precipitation technique (COP) and sintered at 1120, 1220 and 1320 oC. XRD patterns revealed that the samples have an orthorhombic structure and the diffraction patterns can be indexed with the Pbnm space group. The insulator metal transition, TIM increased linearly from 261 K to 272 K with the increase in sintering temperature. The magnetoresistance (MR) measurements were made in magnetic fields from 0.1 to 1 T at room temperature. The percentage of MR increased with increasing of magnetic field and sintering temperature for all samples. The electrical resistivity data were fitted with several equations in the metallic (ferromagnetic) and insulator (paramagnetic) regime. The density of states at the Fermi level N(EF) and the activation energy (Ea) of electron hopping were estimated by using variable range hopping and small polaron hopping model.
format	Article
author	Ewe, L.S Ramli, R Lim, K.P Abd-Shukor, R
spellingShingle	Ewe, L.S Ramli, R Lim, K.P Abd-Shukor, R Electrical and magneto-transport properties of magneto-resistive la0.7Ca0.28Sr0.2 MnO3 prepared at different sintering temperature
author_facet	Ewe, L.S Ramli, R Lim, K.P Abd-Shukor, R
author_sort	Ewe, L.S
title	Electrical and magneto-transport properties of magneto-resistive la0.7Ca0.28Sr0.2 MnO3 prepared at different sintering temperature
title_short	Electrical and magneto-transport properties of magneto-resistive la0.7Ca0.28Sr0.2 MnO3 prepared at different sintering temperature
title_full	Electrical and magneto-transport properties of magneto-resistive la0.7Ca0.28Sr0.2 MnO3 prepared at different sintering temperature
title_fullStr	Electrical and magneto-transport properties of magneto-resistive la0.7Ca0.28Sr0.2 MnO3 prepared at different sintering temperature
title_full_unstemmed	Electrical and magneto-transport properties of magneto-resistive la0.7Ca0.28Sr0.2 MnO3 prepared at different sintering temperature
title_sort	electrical and magneto-transport properties of magneto-resistive la0.7ca0.28sr0.2 mno3 prepared at different sintering temperature
publisher	Universiti Kebangsaan Malaysia
publishDate	2012
url	http://journalarticle.ukm.my/4864/ http://journalarticle.ukm.my/4864/ http://journalarticle.ukm.my/4864/1/14%2520L.S%2520EWe.pdf
first_indexed	2023-09-18T19:42:44Z
last_indexed	2023-09-18T19:42:44Z
_version_	1777405698397700096

Electrical and magneto-transport properties of magneto-resistive la0.7Ca0.28Sr0.2 MnO3 prepared at different sintering temperature

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