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Influence of ag-doped on magnetic and electrical transport properties in Pr0.75Na0.25MnO3 manganites

The manganites compound in which composed of the manganese oxide are attract considerable attention among researcher due to their electrical and magnetic properties at lower temperature. However, most of the doping does not totally induce the ferromagnetic-metallic (FMM) state probably due to dopant...

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Main Author: Khairulzaman, Nurul Nasuha
Format: Thesis
Language:English
English
English
Published: 2019
Subjects:
QC770-798 Nuclear and particle physics. Atomic energy. Radioactivity
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spelling my.uthm.eprints.6532021-08-19T03:15:38Z http://eprints.uthm.edu.my/653/ Influence of ag-doped on magnetic and electrical transport properties in Pr0.75Na0.25MnO3 manganites Khairulzaman, Nurul Nasuha QC770-798 Nuclear and particle physics. Atomic energy. Radioactivity The manganites compound in which composed of the manganese oxide are attract considerable attention among researcher due to their electrical and magnetic properties at lower temperature. However, most of the doping does not totally induce the ferromagnetic-metallic (FMM) state probably due to dopant level. As such, the influence of ion doped on host composition need to be further investigated. In this study, the monovalent doped Pr0.75Na0.25-yAgyMnO3 (y = 0 – 0.10) manganites was prepared by solid-state reaction method. All samples have been characterized using the X-ray diffraction (XRD) and scanning electron microscope (SEM) as well as DC electrical resistivity and AC susceptibility measurement to clarify the influence of Ag-doped on monovalent doped manganites. XRD analysis revealed all samples consists of essentially single phase and crystallized in an orthorhombic structure with space group Pnma. SEM images of Pr0.75Na0.25-yAgyMnO3 compound shows the successful substitution of Ag+ ions with the enhancement of the grains boundaries and sizes as well as the compaction of particles. On the other hand, susceptibility and resistivity measurements showed that the y = 0 sample exhibits anti-ferromagnetic insulating behaviour with Néel temperature, TN ~ 125 K. Interestingly, the FMM transition was observed for y = 0.05 with the metal insulator transition temperature, TMI ~ 110 K and Curie temperature, TC ~ 123 K. However, increasing of Ag-doped up to y = 0.10 showed an insulating behaviour and paramagnetic-ferromagnetic transition with TC around 126 K. Apart from that, the resistivity behaviour at temperature region above TMI for y = 0  0.10 was found to fit well with the variable range hopping model (VRH) with the increasing of hopping and activation energy as the Ag concentration increased. While for the metallic region which is below the TMI, the resistivity data of y = 0.05 was fitted well with the combination of domain/grain boundary, electron-electron and electron-magnon scattering. 2019-09 Thesis NonPeerReviewed text en http://eprints.uthm.edu.my/653/1/24p%20NURUL%20NASUHA%20KHAIRULZAMAN.pdf text en http://eprints.uthm.edu.my/653/2/NURUL%20NASUHA%20KHAIRULZAMAN%20COPYRIGHT%20DECLARATION.pdf text en http://eprints.uthm.edu.my/653/3/NURUL%20NASUHA%20KHAIRULZAMAN%20WATERMARK.pdf Khairulzaman, Nurul Nasuha (2019) Influence of ag-doped on magnetic and electrical transport properties in Pr0.75Na0.25MnO3 manganites. 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 QC770-798 Nuclear and particle physics. Atomic energy. Radioactivity
spellingShingle QC770-798 Nuclear and particle physics. Atomic energy. Radioactivity
Khairulzaman, Nurul Nasuha
Influence of ag-doped on magnetic and electrical transport properties in Pr0.75Na0.25MnO3 manganites
description The manganites compound in which composed of the manganese oxide are attract considerable attention among researcher due to their electrical and magnetic properties at lower temperature. However, most of the doping does not totally induce the ferromagnetic-metallic (FMM) state probably due to dopant level. As such, the influence of ion doped on host composition need to be further investigated. In this study, the monovalent doped Pr0.75Na0.25-yAgyMnO3 (y = 0 – 0.10) manganites was prepared by solid-state reaction method. All samples have been characterized using the X-ray diffraction (XRD) and scanning electron microscope (SEM) as well as DC electrical resistivity and AC susceptibility measurement to clarify the influence of Ag-doped on monovalent doped manganites. XRD analysis revealed all samples consists of essentially single phase and crystallized in an orthorhombic structure with space group Pnma. SEM images of Pr0.75Na0.25-yAgyMnO3 compound shows the successful substitution of Ag+ ions with the enhancement of the grains boundaries and sizes as well as the compaction of particles. On the other hand, susceptibility and resistivity measurements showed that the y = 0 sample exhibits anti-ferromagnetic insulating behaviour with Néel temperature, TN ~ 125 K. Interestingly, the FMM transition was observed for y = 0.05 with the metal insulator transition temperature, TMI ~ 110 K and Curie temperature, TC ~ 123 K. However, increasing of Ag-doped up to y = 0.10 showed an insulating behaviour and paramagnetic-ferromagnetic transition with TC around 126 K. Apart from that, the resistivity behaviour at temperature region above TMI for y = 0  0.10 was found to fit well with the variable range hopping model (VRH) with the increasing of hopping and activation energy as the Ag concentration increased. While for the metallic region which is below the TMI, the resistivity data of y = 0.05 was fitted well with the combination of domain/grain boundary, electron-electron and electron-magnon scattering.
format Thesis
author Khairulzaman, Nurul Nasuha
author_facet Khairulzaman, Nurul Nasuha
author_sort Khairulzaman, Nurul Nasuha
title Influence of ag-doped on magnetic and electrical transport properties in Pr0.75Na0.25MnO3 manganites
title_short Influence of ag-doped on magnetic and electrical transport properties in Pr0.75Na0.25MnO3 manganites
title_full Influence of ag-doped on magnetic and electrical transport properties in Pr0.75Na0.25MnO3 manganites
title_fullStr Influence of ag-doped on magnetic and electrical transport properties in Pr0.75Na0.25MnO3 manganites
title_full_unstemmed Influence of ag-doped on magnetic and electrical transport properties in Pr0.75Na0.25MnO3 manganites
title_sort influence of ag-doped on magnetic and electrical transport properties in pr0.75na0.25mno3 manganites
publishDate 2019
url http://eprints.uthm.edu.my/653/1/24p%20NURUL%20NASUHA%20KHAIRULZAMAN.pdf
http://eprints.uthm.edu.my/653/2/NURUL%20NASUHA%20KHAIRULZAMAN%20COPYRIGHT%20DECLARATION.pdf
http://eprints.uthm.edu.my/653/3/NURUL%20NASUHA%20KHAIRULZAMAN%20WATERMARK.pdf
http://eprints.uthm.edu.my/653/
_version_ 1738580764851699712
score 13.211869

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