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Low Sm doping effect on the low-field magnetoresistive properties in (La1-xSmx)0.67Sr0.33MnO perovskite

A series of polycrystalline samples (La1-xSmx) 0.67Sr0.33MnO3 (X=0.00, 0.05 and 0.10) were prepared using the conventional solid-state reaction method. The XRD analysis indicated that all the samples were fully crystalline and in a single phase with a rhombohedral structure after a sintering at 1200...

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Main Authors: Lim, Kean Pah, Shaari, Abdul Halim, Chen, Soo Kien, Ng, Siau Wei, Zainuddin, Zalita, Ye, Chau Yuen
Format: Article
Language:English
Published: Universiti Putra Malaysia Press 2009
Online Access:http://psasir.upm.edu.my/id/eprint/15493/1/Low%20Sm%20doping%20effect%20on%20the%20low-field%20magnetoresistive%20properties%20in%20%28La1-xSmx%290.67Sr0.33MnO%20perovskite.pdf
http://psasir.upm.edu.my/id/eprint/15493/
http://www.pertanika.upm.edu.my/Pertanika%20PAPERS/JST%20Vol.%2017%20(2)%20Jul.%202009/11%20Pages%20291-297.pdf
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spelling my.upm.eprints.154932015-11-20T05:52:47Z http://psasir.upm.edu.my/id/eprint/15493/ Low Sm doping effect on the low-field magnetoresistive properties in (La1-xSmx)0.67Sr0.33MnO perovskite Lim, Kean Pah Shaari, Abdul Halim Chen, Soo Kien Ng, Siau Wei Zainuddin, Zalita Ye, Chau Yuen A series of polycrystalline samples (La1-xSmx) 0.67Sr0.33MnO3 (X=0.00, 0.05 and 0.10) were prepared using the conventional solid-state reaction method. The XRD analysis indicated that all the samples were fully crystalline and in a single phase with a rhombohedral structure after a sintering at 1200°C for 24 hours in air. Meanwhile, the Atomic Force Microscopy measurements showed that a small amount of Sm doping in La sites affected the grain growth and this might affect the grain boundary layer, thus resulting in the reduction of the Curie temperature, TC. Extrinsic magnetoresistance (MR) was observed for all the samples with a large negative MR at low field (0-0.1 or 0.2T) region, followed by a slower varying MR at high field (0.1 or 0.2-1T). The highest low-field MR value of -4.6% (at 0.1T) and -6.1% (at 0.2T) were observed for sample X=0.10 and X=0.05, respectively. Hence, these indicated that the extrinsic MR was grain size dependent and was therefore enhanced with a small amount of Sm substitution in La sites. Universiti Putra Malaysia Press 2009-07 Article PeerReviewed application/pdf en http://psasir.upm.edu.my/id/eprint/15493/1/Low%20Sm%20doping%20effect%20on%20the%20low-field%20magnetoresistive%20properties%20in%20%28La1-xSmx%290.67Sr0.33MnO%20perovskite.pdf Lim, Kean Pah and Shaari, Abdul Halim and Chen, Soo Kien and Ng, Siau Wei and Zainuddin, Zalita and Ye, Chau Yuen (2009) Low Sm doping effect on the low-field magnetoresistive properties in (La1-xSmx)0.67Sr0.33MnO perovskite. Pertanika Journal of Science & Technology, 17 (2). pp. 291-297. ISSN 0128-7680; ESSN: 2231-8526 http://www.pertanika.upm.edu.my/Pertanika%20PAPERS/JST%20Vol.%2017%20(2)%20Jul.%202009/11%20Pages%20291-297.pdf
institution Universiti Putra Malaysia
building UPM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Putra Malaysia
content_source UPM Institutional Repository
url_provider http://psasir.upm.edu.my/
language English
description A series of polycrystalline samples (La1-xSmx) 0.67Sr0.33MnO3 (X=0.00, 0.05 and 0.10) were prepared using the conventional solid-state reaction method. The XRD analysis indicated that all the samples were fully crystalline and in a single phase with a rhombohedral structure after a sintering at 1200°C for 24 hours in air. Meanwhile, the Atomic Force Microscopy measurements showed that a small amount of Sm doping in La sites affected the grain growth and this might affect the grain boundary layer, thus resulting in the reduction of the Curie temperature, TC. Extrinsic magnetoresistance (MR) was observed for all the samples with a large negative MR at low field (0-0.1 or 0.2T) region, followed by a slower varying MR at high field (0.1 or 0.2-1T). The highest low-field MR value of -4.6% (at 0.1T) and -6.1% (at 0.2T) were observed for sample X=0.10 and X=0.05, respectively. Hence, these indicated that the extrinsic MR was grain size dependent and was therefore enhanced with a small amount of Sm substitution in La sites.
format Article
author Lim, Kean Pah
Shaari, Abdul Halim
Chen, Soo Kien
Ng, Siau Wei
Zainuddin, Zalita
Ye, Chau Yuen
spellingShingle Lim, Kean Pah
Shaari, Abdul Halim
Chen, Soo Kien
Ng, Siau Wei
Zainuddin, Zalita
Ye, Chau Yuen
Low Sm doping effect on the low-field magnetoresistive properties in (La1-xSmx)0.67Sr0.33MnO perovskite
author_facet Lim, Kean Pah
Shaari, Abdul Halim
Chen, Soo Kien
Ng, Siau Wei
Zainuddin, Zalita
Ye, Chau Yuen
author_sort Lim, Kean Pah
title Low Sm doping effect on the low-field magnetoresistive properties in (La1-xSmx)0.67Sr0.33MnO perovskite
title_short Low Sm doping effect on the low-field magnetoresistive properties in (La1-xSmx)0.67Sr0.33MnO perovskite
title_full Low Sm doping effect on the low-field magnetoresistive properties in (La1-xSmx)0.67Sr0.33MnO perovskite
title_fullStr Low Sm doping effect on the low-field magnetoresistive properties in (La1-xSmx)0.67Sr0.33MnO perovskite
title_full_unstemmed Low Sm doping effect on the low-field magnetoresistive properties in (La1-xSmx)0.67Sr0.33MnO perovskite
title_sort low sm doping effect on the low-field magnetoresistive properties in (la1-xsmx)0.67sr0.33mno perovskite
publisher Universiti Putra Malaysia Press
publishDate 2009
url http://psasir.upm.edu.my/id/eprint/15493/1/Low%20Sm%20doping%20effect%20on%20the%20low-field%20magnetoresistive%20properties%20in%20%28La1-xSmx%290.67Sr0.33MnO%20perovskite.pdf
http://psasir.upm.edu.my/id/eprint/15493/
http://www.pertanika.upm.edu.my/Pertanika%20PAPERS/JST%20Vol.%2017%20(2)%20Jul.%202009/11%20Pages%20291-297.pdf
_version_ 1643825946714701824
score 13.211869

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