Disorder phenomena in Nd-doped (Pr1-xNdx)0.67Ba0.33MnO3 manganites

Disorder phenomena in Nd-doped (Pr1-xNdx)0.67Ba0.33MnO3 manganites

Polycrystalline samples of (Pr1-xNdx)0.67Ba0.33MnO3 with x = 0.0, 0.167, 0.33, 0.5, 0.67, 0.833, and 1.0 have been prepared using the solid state reaction. The samples were calcined at 900oC for 12 hours, pelletized and sintered at 1300oC for 24 hours. The structures were investigated via X-ray diff...

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Main Authors: H. Abdullah, S.A. Halim
Format: Article
Language:English
Published: Universiti Kebangsaan Malaysia 2010
Online Access:http://journalarticle.ukm.my/330/
http://journalarticle.ukm.my/330/
http://journalarticle.ukm.my/330/1/
id ukm-330
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spelling ukm-3302016-12-14T06:27:04Z http://journalarticle.ukm.my/330/ Disorder phenomena in Nd-doped (Pr1-xNdx)0.67Ba0.33MnO3 manganites H. Abdullah, S.A. Halim, Polycrystalline samples of (Pr1-xNdx)0.67Ba0.33MnO3 with x = 0.0, 0.167, 0.33, 0.5, 0.67, 0.833, and 1.0 have been prepared using the solid state reaction. The samples were calcined at 900oC for 12 hours, pelletized and sintered at 1300oC for 24 hours. The structures were investigated via X-ray diffraction (XRD) method. XRD patterns showed orthorhombic distorted perovskite structures. The scanning electron microscopy (SEM) micrographs showed the disorder of the structure in all substitutions. This influenced the value of the magnetoresistance (MR). The MR effects are measured using the four point probe technique with a magnetic field of B ≤ 1T at temperatures of 90, 100, 150, 200, 250, 270 and 300 K. Overall, the MR increased as the temperature decreased. All doping concentrations gave a small variation range (~10% to ~56%). The highest MR value of 56.5 % is observed at 100 K for a sample with x = 1.0. The influence of disorder on the magnetoresistance in (Pr1-xNdx)0.67Ba0.33MnO3 manganites at low temperatures was also discussed in this paper. Universiti Kebangsaan Malaysia 2010-02 Article PeerReviewed application/pdf en http://journalarticle.ukm.my/330/1/ H. Abdullah, and S.A. Halim, (2010) Disorder phenomena in Nd-doped (Pr1-xNdx)0.67Ba0.33MnO3 manganites. Sains Malaysiana, 39 (1). pp. 93-98. 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 Polycrystalline samples of (Pr1-xNdx)0.67Ba0.33MnO3 with x = 0.0, 0.167, 0.33, 0.5, 0.67, 0.833, and 1.0 have been prepared using the solid state reaction. The samples were calcined at 900oC for 12 hours, pelletized and sintered at 1300oC for 24 hours. The structures were investigated via X-ray diffraction (XRD) method. XRD patterns showed orthorhombic distorted perovskite structures. The scanning electron microscopy (SEM) micrographs showed the disorder of the structure in all substitutions. This influenced the value of the magnetoresistance (MR). The MR effects are measured using the four point probe technique with a magnetic field of B ≤ 1T at temperatures of 90, 100, 150, 200, 250, 270 and 300 K. Overall, the MR increased as the temperature decreased. All doping concentrations gave a small variation range (~10% to ~56%). The highest MR value of 56.5 % is observed at 100 K for a sample with x = 1.0. The influence of disorder on the magnetoresistance in (Pr1-xNdx)0.67Ba0.33MnO3 manganites at low temperatures was also discussed in this paper.
format Article
author H. Abdullah,
S.A. Halim,
spellingShingle H. Abdullah,
S.A. Halim,
Disorder phenomena in Nd-doped (Pr1-xNdx)0.67Ba0.33MnO3 manganites
author_facet H. Abdullah,
S.A. Halim,
author_sort H. Abdullah,
title Disorder phenomena in Nd-doped (Pr1-xNdx)0.67Ba0.33MnO3 manganites
title_short Disorder phenomena in Nd-doped (Pr1-xNdx)0.67Ba0.33MnO3 manganites
title_full Disorder phenomena in Nd-doped (Pr1-xNdx)0.67Ba0.33MnO3 manganites
title_fullStr Disorder phenomena in Nd-doped (Pr1-xNdx)0.67Ba0.33MnO3 manganites
title_full_unstemmed Disorder phenomena in Nd-doped (Pr1-xNdx)0.67Ba0.33MnO3 manganites
title_sort disorder phenomena in nd-doped (pr1-xndx)0.67ba0.33mno3 manganites
publisher Universiti Kebangsaan Malaysia
publishDate 2010
url http://journalarticle.ukm.my/330/
http://journalarticle.ukm.my/330/
http://journalarticle.ukm.my/330/1/
first_indexed 2023-09-18T19:30:37Z
last_indexed 2023-09-18T19:30:37Z
_version_ 1777404935906787328

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