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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
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spelling my.uthm.eprints.11122021-08-22T08:39:59Z http://eprints.uthm.edu.my/1112/ Study on structure, surface morphology, electrical and magnetic properties in monovalent doped Pr0.75Na0.25Mn1-xCrxO3 AND Nd0.75Na0.25Mn1-yCryO3 of magnetic ceramics 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 NonPeerReviewed text en http://eprints.uthm.edu.my/1112/1/24p%20RABIATUL%20ADAWIYAH%20BINTI%20ZAWAWI.pdf text en http://eprints.uthm.edu.my/1112/2/RABIATUL%20ADAWIYAH%20BINTI%20ZAWAWI%20COPYRIGHT%20DECLARATION.pdf text en http://eprints.uthm.edu.my/1112/3/RABIATUL%20ADAWIYAH%20BINTI%20ZAWAWI%20WATERMARK.pdf Zawawi, Rabiatul Adawiyah (2021) Study on structure, surface morphology, electrical and magnetic properties in monovalent doped Pr0.75Na0.25Mn1-xCrxO3 AND Nd0.75Na0.25Mn1-yCryO3 of magnetic ceramics. Masters thesis, Universiti Tun Hussein Onn Malaysia.
institution Universiti Tun Hussein Onn Malaysia
building UTHM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Tun Hussein Onn Malaysia
content_source UTHM Institutional Repository
url_provider http://eprints.uthm.edu.my/
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
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
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
http://eprints.uthm.edu.my/1112/
_version_ 1738580820698857472
score 13.211869

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