Staff View: Effect of Pr3+ substitution at the a-site on the structural and electrical properties of hole-doped La-Based Manganites / Rozilah Rajmi ... [et al.]

Effect of Pr3+ substitution at the a-site on the structural and electrical properties of hole-doped La-Based Manganites / Rozilah Rajmi ... [et al.]

In this study, the effect of praseodymium substitution at La-site on structural and electrical transport properties of La0.5Ba0.5MnO3 was investigated. Polycrystalline La0.5-xPr0.5x Ba0.5MnO3 (x = 0, 0.50, 1.00) were synthesized using a conventional solid-state method. The powder X-ray diffraction p...

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Main Authors:	Rajmi, Rozilah, Ibrahim, Norazila, Shamsuddin, Suhadir, Md Salleh, Shahrulnizam, Othman, Muhamad Hazri
Format:	Article
Language:	English
Published:	Research Management Institute (RMI) 2024
Subjects:	TK Electrical engineering. Electronics. Nuclear engineering
Online Access:	https://ir.uitm.edu.my/id/eprint/91475/2/91475.pdf https://ir.uitm.edu.my/id/eprint/91475/
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spelling	my.uitm.ir.914752024-08-19T04:00:05Z https://ir.uitm.edu.my/id/eprint/91475/ Effect of Pr3+ substitution at the a-site on the structural and electrical properties of hole-doped La-Based Manganites / Rozilah Rajmi ... [et al.] srj Rajmi, Rozilah Ibrahim, Norazila Shamsuddin, Suhadir Md Salleh, Shahrulnizam Othman, Muhamad Hazri TK Electrical engineering. Electronics. Nuclear engineering In this study, the effect of praseodymium substitution at La-site on structural and electrical transport properties of La0.5Ba0.5MnO3 was investigated. Polycrystalline La0.5-xPr0.5x Ba0.5MnO3 (x = 0, 0.50, 1.00) were synthesized using a conventional solid-state method. The powder X-ray diffraction patterns show a single-phase orthorhombic distorted perovskite structure with space group Pnma. The Rietveld refinement analysis showed that the unit cell volume decreased as Pr3+ substitution increased which may be attributed to the different ionic radii of ions. Electrical resistivity measurements by using standard four-point probe resistivity measurement in a temperature range of 30 K to 300 K. As the Pr3+ concentration increases, metal-insulator transition, TMI decreases from 264K (x=0) to 157K (x=1.00) while resistivity increases from 1.16 Ω.cm (x = 0) to 20.3 Ω.cm (x =1.00). The decreased TMI are attributed to the decrease in tolerance factor which indicates enhancement in MnO6 octahedral distortion consequently reduce double exchange interaction. The electrical resistivity in the metallic region for all samples was fitted with the combination of domain/grain boundary, electron-electron, electron-magnon and electron-phonon scattering processes. The resistivity behaviour in the insulating region for all samples was attributed to small polaron hopping model which revealed that the activation energies increased as Pr3+ content increased due to the enhancement in the distortion of MnO6 octahedral. Research Management Institute (RMI) 2024-03 Article PeerReviewed text en https://ir.uitm.edu.my/id/eprint/91475/2/91475.pdf Effect of Pr3+ substitution at the a-site on the structural and electrical properties of hole-doped La-Based Manganites / Rozilah Rajmi ... [et al.]. (2024) Scientific Research Journal <https://ir.uitm.edu.my/view/publication/Scientific_Research_Journal/>, 21 (1): 4. pp. 67-82. ISSN 1675-7009
institution	Universiti Teknologi Mara
building	Tun Abdul Razak Library
collection	Institutional Repository
continent	Asia
country	Malaysia
content_provider	Universiti Teknologi Mara
content_source	UiTM Institutional Repository
url_provider	http://ir.uitm.edu.my/
language	English
topic	TK Electrical engineering. Electronics. Nuclear engineering
spellingShingle	TK Electrical engineering. Electronics. Nuclear engineering Rajmi, Rozilah Ibrahim, Norazila Shamsuddin, Suhadir Md Salleh, Shahrulnizam Othman, Muhamad Hazri Effect of Pr3+ substitution at the a-site on the structural and electrical properties of hole-doped La-Based Manganites / Rozilah Rajmi ... [et al.]
description	In this study, the effect of praseodymium substitution at La-site on structural and electrical transport properties of La0.5Ba0.5MnO3 was investigated. Polycrystalline La0.5-xPr0.5x Ba0.5MnO3 (x = 0, 0.50, 1.00) were synthesized using a conventional solid-state method. The powder X-ray diffraction patterns show a single-phase orthorhombic distorted perovskite structure with space group Pnma. The Rietveld refinement analysis showed that the unit cell volume decreased as Pr3+ substitution increased which may be attributed to the different ionic radii of ions. Electrical resistivity measurements by using standard four-point probe resistivity measurement in a temperature range of 30 K to 300 K. As the Pr3+ concentration increases, metal-insulator transition, TMI decreases from 264K (x=0) to 157K (x=1.00) while resistivity increases from 1.16 Ω.cm (x = 0) to 20.3 Ω.cm (x =1.00). The decreased TMI are attributed to the decrease in tolerance factor which indicates enhancement in MnO6 octahedral distortion consequently reduce double exchange interaction. The electrical resistivity in the metallic region for all samples was fitted with the combination of domain/grain boundary, electron-electron, electron-magnon and electron-phonon scattering processes. The resistivity behaviour in the insulating region for all samples was attributed to small polaron hopping model which revealed that the activation energies increased as Pr3+ content increased due to the enhancement in the distortion of MnO6 octahedral.
format	Article
author	Rajmi, Rozilah Ibrahim, Norazila Shamsuddin, Suhadir Md Salleh, Shahrulnizam Othman, Muhamad Hazri
author_facet	Rajmi, Rozilah Ibrahim, Norazila Shamsuddin, Suhadir Md Salleh, Shahrulnizam Othman, Muhamad Hazri
author_sort	Rajmi, Rozilah
title	Effect of Pr3+ substitution at the a-site on the structural and electrical properties of hole-doped La-Based Manganites / Rozilah Rajmi ... [et al.]
title_short	Effect of Pr3+ substitution at the a-site on the structural and electrical properties of hole-doped La-Based Manganites / Rozilah Rajmi ... [et al.]
title_full	Effect of Pr3+ substitution at the a-site on the structural and electrical properties of hole-doped La-Based Manganites / Rozilah Rajmi ... [et al.]
title_fullStr	Effect of Pr3+ substitution at the a-site on the structural and electrical properties of hole-doped La-Based Manganites / Rozilah Rajmi ... [et al.]
title_full_unstemmed	Effect of Pr3+ substitution at the a-site on the structural and electrical properties of hole-doped La-Based Manganites / Rozilah Rajmi ... [et al.]
title_sort	effect of pr3+ substitution at the a-site on the structural and electrical properties of hole-doped la-based manganites / rozilah rajmi ... [et al.]
publisher	Research Management Institute (RMI)
publishDate	2024
url	https://ir.uitm.edu.my/id/eprint/91475/2/91475.pdf https://ir.uitm.edu.my/id/eprint/91475/
_version_	1808975940977426432
score	13.211869

Effect of Pr3+ substitution at the a-site on the structural and electrical properties of hole-doped La-Based Manganites / Rozilah Rajmi ... [et al.]

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