Study on structure, surface morphology, electrical and magnetic properties in monovalent doped Pr0.75Na0.25Mn1-xCrxO3 AND Nd0.75Na0.25Mn1-yCryO3 of magnetic ceramics

In perovskite manganites, Mn site substitution of Cr ion have attract great interest to suppress CO and induce phase transition. However most of study show inconsistent result regarding to the crystalline phase, surface morphology and magnetic properties as well as electrical properties study. Thus,...

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Main Author:	Zawawi, Rabiatul Adawiyah
Format:	Thesis
Language:	English English English
Published:	2021
Subjects:	TA401-492 Materials of engineering and construction Mechanics of materials
Online Access:	http://eprints.uthm.edu.my/1112/1/24p%20RABIATUL%20ADAWIYAH%20BINTI%20ZAWAWI.pdf http://eprints.uthm.edu.my/1112/2/RABIATUL%20ADAWIYAH%20BINTI%20ZAWAWI%20COPYRIGHT%20DECLARATION.pdf http://eprints.uthm.edu.my/1112/3/RABIATUL%20ADAWIYAH%20BINTI%20ZAWAWI%20WATERMARK.pdf
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spelling	my-uthm-ep.11122021-08-22T08:39:59Z Study on structure, surface morphology, electrical and magnetic properties in monovalent doped Pr0.75Na0.25Mn1-xCrxO3 AND Nd0.75Na0.25Mn1-yCryO3 of magnetic ceramics 2021-03 Zawawi, Rabiatul Adawiyah TA401-492 Materials of engineering and construction. Mechanics of materials In perovskite manganites, Mn site substitution of Cr ion have attract great interest to suppress CO and induce phase transition. However most of study show inconsistent result regarding to the crystalline phase, surface morphology and magnetic properties as well as electrical properties study. Thus, two series of charge-ordered compound Pr0.75Na0.25Mn1-xCrxO3 (0≤x≤0.04) and Nd0.75Na0.25Mn1-yCryO3 (0≤y≤0.05) manganites have been synthesized using solid-state reaction method and the crystalline phase, surface morphology and magnetic properties as well as electrical properties were reported. Cr3+ have been chosen in this study due the electronic configuration which similar to Mn4+ where it is possibly involved in double-exchange mechanism. X-ray diffraction analysis revealed the crystalline phase of all samples consists of essentially single phase and crystallized in an orthorhombic structure. The Cr doping were influence the lattice parameters and the unit cell volume, V whereas the values of V was observed to be decreased for both manganites series. Scanning electron microscope images of both compounds showed the changes of surface morphology for all samples when Cr was doped. AC susceptibility and DC electrical resistivity measurement for both parent compounds (x = 0 and y = 0) showed paramagnetic-insulator down to lower temperature. Interestingly, increasing of Cr for Pr0.75Na0.25Mn1-xCrxO3 compound showed ferromagnetic-metallic (FMM) transition for x = 0.02 and x = 0.04 samples. Metal-insulator transition temperature, TMI were found to be TMI~120 K and TMI~122 K. Meanwhile for AC susceptibility measurement with Curie temperature, TC increases from 132 K to 141 K respectively and undergoes the transition paramagnetic to ferromagnetic state. While, the Nd0.75Na0.25Mn1-yCryO3 showed antiferromagnetic-insulator for y = 0, y = 0.02 and y = 0.05. Thus, the effect of Cr substitution on both manganites series showed significant results on crystalline phase, surface morphology and magnetic as well as electrical properties. 2021-03 Thesis http://eprints.uthm.edu.my/1112/ http://eprints.uthm.edu.my/1112/1/24p%20RABIATUL%20ADAWIYAH%20BINTI%20ZAWAWI.pdf text en public http://eprints.uthm.edu.my/1112/2/RABIATUL%20ADAWIYAH%20BINTI%20ZAWAWI%20COPYRIGHT%20DECLARATION.pdf text en staffonly http://eprints.uthm.edu.my/1112/3/RABIATUL%20ADAWIYAH%20BINTI%20ZAWAWI%20WATERMARK.pdf text en validuser mphil masters Universiti Tun Hussein Onn Malaysia Faculty of Applied Science and Technology
institution	Universiti Tun Hussein Onn Malaysia
collection	UTHM Institutional Repository
language	English English English
topic	TA401-492 Materials of engineering and construction Mechanics of materials
spellingShingle	TA401-492 Materials of engineering and construction Mechanics of materials Zawawi, Rabiatul Adawiyah Study on structure, surface morphology, electrical and magnetic properties in monovalent doped Pr0.75Na0.25Mn1-xCrxO3 AND Nd0.75Na0.25Mn1-yCryO3 of magnetic ceramics
description	In perovskite manganites, Mn site substitution of Cr ion have attract great interest to suppress CO and induce phase transition. However most of study show inconsistent result regarding to the crystalline phase, surface morphology and magnetic properties as well as electrical properties study. Thus, two series of charge-ordered compound Pr0.75Na0.25Mn1-xCrxO3 (0≤x≤0.04) and Nd0.75Na0.25Mn1-yCryO3 (0≤y≤0.05) manganites have been synthesized using solid-state reaction method and the crystalline phase, surface morphology and magnetic properties as well as electrical properties were reported. Cr3+ have been chosen in this study due the electronic configuration which similar to Mn4+ where it is possibly involved in double-exchange mechanism. X-ray diffraction analysis revealed the crystalline phase of all samples consists of essentially single phase and crystallized in an orthorhombic structure. The Cr doping were influence the lattice parameters and the unit cell volume, V whereas the values of V was observed to be decreased for both manganites series. Scanning electron microscope images of both compounds showed the changes of surface morphology for all samples when Cr was doped. AC susceptibility and DC electrical resistivity measurement for both parent compounds (x = 0 and y = 0) showed paramagnetic-insulator down to lower temperature. Interestingly, increasing of Cr for Pr0.75Na0.25Mn1-xCrxO3 compound showed ferromagnetic-metallic (FMM) transition for x = 0.02 and x = 0.04 samples. Metal-insulator transition temperature, TMI were found to be TMI~120 K and TMI~122 K. Meanwhile for AC susceptibility measurement with Curie temperature, TC increases from 132 K to 141 K respectively and undergoes the transition paramagnetic to ferromagnetic state. While, the Nd0.75Na0.25Mn1-yCryO3 showed antiferromagnetic-insulator for y = 0, y = 0.02 and y = 0.05. Thus, the effect of Cr substitution on both manganites series showed significant results on crystalline phase, surface morphology and magnetic as well as electrical properties.
format	Thesis
qualification_name	Master of Philosophy (M.Phil.)
qualification_level	Master's degree
author	Zawawi, Rabiatul Adawiyah
author_facet	Zawawi, Rabiatul Adawiyah
author_sort	Zawawi, Rabiatul Adawiyah
title	Study on structure, surface morphology, electrical and magnetic properties in monovalent doped Pr0.75Na0.25Mn1-xCrxO3 AND Nd0.75Na0.25Mn1-yCryO3 of magnetic ceramics
title_short	Study on structure, surface morphology, electrical and magnetic properties in monovalent doped Pr0.75Na0.25Mn1-xCrxO3 AND Nd0.75Na0.25Mn1-yCryO3 of magnetic ceramics
title_full	Study on structure, surface morphology, electrical and magnetic properties in monovalent doped Pr0.75Na0.25Mn1-xCrxO3 AND Nd0.75Na0.25Mn1-yCryO3 of magnetic ceramics
title_fullStr	Study on structure, surface morphology, electrical and magnetic properties in monovalent doped Pr0.75Na0.25Mn1-xCrxO3 AND Nd0.75Na0.25Mn1-yCryO3 of magnetic ceramics
title_full_unstemmed	Study on structure, surface morphology, electrical and magnetic properties in monovalent doped Pr0.75Na0.25Mn1-xCrxO3 AND Nd0.75Na0.25Mn1-yCryO3 of magnetic ceramics
title_sort	study on structure, surface morphology, electrical and magnetic properties in monovalent doped pr0.75na0.25mn1-xcrxo3 and nd0.75na0.25mn1-ycryo3 of magnetic ceramics
granting_institution	Universiti Tun Hussein Onn Malaysia
granting_department	Faculty of Applied Science and Technology
publishDate	2021
url	http://eprints.uthm.edu.my/1112/1/24p%20RABIATUL%20ADAWIYAH%20BINTI%20ZAWAWI.pdf http://eprints.uthm.edu.my/1112/2/RABIATUL%20ADAWIYAH%20BINTI%20ZAWAWI%20COPYRIGHT%20DECLARATION.pdf http://eprints.uthm.edu.my/1112/3/RABIATUL%20ADAWIYAH%20BINTI%20ZAWAWI%20WATERMARK.pdf
_version_	1747830739295010816

Study on structure, surface morphology, electrical and magnetic properties in monovalent doped Pr0.75Na0.25Mn1-xCrxO3 AND Nd0.75Na0.25Mn1-yCryO3 of magnetic ceramics

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