Structural, electrical, magnetic properties and electroresistance effect of La0.7Ba0.3Mn1-xMxO3 (M = Fe3+, Mo6+: x = 0, 0.01, 0.02, 0.03, 0.04) doped manganites / Muhammad Suffian Sazali

The structural, electrical and magnetic properties and electroresistance (ER) effect in La0.7Ba0.3Mn1-xMxO3 (M = Fe3+, Mo6+: x = 0 - 0.04) prepared by using solid state method have been studied. An analysis of X-ray diffraction data using Rietvield refinement method showed all samples crystallized i...

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Main Author:	Sazali, Muhammad Suffian
Format:	Thesis
Language:	English
Published:	2022
Subjects:	Metallurgy Radiography
Online Access:	https://ir.uitm.edu.my/id/eprint/72938/1/72938.pdf
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id	my-uitm-ir.72938
record_format	uketd_dc
spelling	my-uitm-ir.729382023-02-01T13:53:14Z Structural, electrical, magnetic properties and electroresistance effect of La0.7Ba0.3Mn1-xMxO3 (M = Fe3+, Mo6+: x = 0, 0.01, 0.02, 0.03, 0.04) doped manganites / Muhammad Suffian Sazali 2022 Sazali, Muhammad Suffian Metallurgy Radiography The structural, electrical and magnetic properties and electroresistance (ER) effect in La0.7Ba0.3Mn1-xMxO3 (M = Fe3+, Mo6+: x = 0 - 0.04) prepared by using solid state method have been studied. An analysis of X-ray diffraction data using Rietvield refinement method showed all samples crystallized in rhombohedral R-3c structural and are in single phased except for Mo substituted samples (x ≥ 0.02). Substitution of Fe cause small changes in unit cell volume indicates the substitution of Fe not much influence on lattice distortion. Contrary to that, Mo substitution at Mn site in La0.7Ba0.3Mn1-xMoxO3 causes increase in unit cell volume except for x = 0.02 indicate the occurrence of lattice distortion in the system. From p vs T curves shown that both Fe and Mo substitution increased the resistivity in the temperature range of 20 K - 300 K under applied current of 10mA and exhibit decreased in resistivity under applied current of 20mA. The observed behaviour indicates enhancements of conduction itinerant electrons and weakened electron-lattice interactions, in the metallic and insulating regions, respectively. Both Fe and Mo substituted samples exhibit larger value of ER effect compared to x = 0 at low temperature region which may be related to formation of more conduction filamentary path induced by magnetic inhomogeneity under higher applied current. In insulating region, the low value of ER effect in all substituted samples may related to enhancement of localization of charge carrier. Both Fe and Mo substitution increased the scattering effect indicates by the increased of scattering parameters while high applied current reduced the effects in metallic region. In the insulating region, the observed resistivity behaviour can be explained by small polaron hopping, SPH process. Both Fe and Mo substitution increased the electron-lattice attraction as hopping energy, Ea values are larger in the Fe and Mo substituted samples as compared to x = 0 sample whereas the electron-lattice attraction weakened under applied current of 20mA. The observed nearly constant ER effect in Mo substituted samples indicates high stability of the sample in wide temperature range which suitable for next generation of electronic device. 2022 Thesis https://ir.uitm.edu.my/id/eprint/72938/ https://ir.uitm.edu.my/id/eprint/72938/1/72938.pdf text en public masters Universiti Teknologi MARA (UiTM) Faculty of Applied Sciences Ibrahim, Norazila Mohamed, Zakiah
institution	Universiti Teknologi MARA
collection	UiTM Institutional Repository
language	English
advisor	Ibrahim, Norazila Mohamed, Zakiah
topic	Metallurgy Radiography
spellingShingle	Metallurgy Radiography Sazali, Muhammad Suffian Structural, electrical, magnetic properties and electroresistance effect of La0.7Ba0.3Mn1-xMxO3 (M = Fe3+, Mo6+: x = 0, 0.01, 0.02, 0.03, 0.04) doped manganites / Muhammad Suffian Sazali
description	The structural, electrical and magnetic properties and electroresistance (ER) effect in La0.7Ba0.3Mn1-xMxO3 (M = Fe3+, Mo6+: x = 0 - 0.04) prepared by using solid state method have been studied. An analysis of X-ray diffraction data using Rietvield refinement method showed all samples crystallized in rhombohedral R-3c structural and are in single phased except for Mo substituted samples (x ≥ 0.02). Substitution of Fe cause small changes in unit cell volume indicates the substitution of Fe not much influence on lattice distortion. Contrary to that, Mo substitution at Mn site in La0.7Ba0.3Mn1-xMoxO3 causes increase in unit cell volume except for x = 0.02 indicate the occurrence of lattice distortion in the system. From p vs T curves shown that both Fe and Mo substitution increased the resistivity in the temperature range of 20 K - 300 K under applied current of 10mA and exhibit decreased in resistivity under applied current of 20mA. The observed behaviour indicates enhancements of conduction itinerant electrons and weakened electron-lattice interactions, in the metallic and insulating regions, respectively. Both Fe and Mo substituted samples exhibit larger value of ER effect compared to x = 0 at low temperature region which may be related to formation of more conduction filamentary path induced by magnetic inhomogeneity under higher applied current. In insulating region, the low value of ER effect in all substituted samples may related to enhancement of localization of charge carrier. Both Fe and Mo substitution increased the scattering effect indicates by the increased of scattering parameters while high applied current reduced the effects in metallic region. In the insulating region, the observed resistivity behaviour can be explained by small polaron hopping, SPH process. Both Fe and Mo substitution increased the electron-lattice attraction as hopping energy, Ea values are larger in the Fe and Mo substituted samples as compared to x = 0 sample whereas the electron-lattice attraction weakened under applied current of 20mA. The observed nearly constant ER effect in Mo substituted samples indicates high stability of the sample in wide temperature range which suitable for next generation of electronic device.
format	Thesis
qualification_level	Master's degree
author	Sazali, Muhammad Suffian
author_facet	Sazali, Muhammad Suffian
author_sort	Sazali, Muhammad Suffian
title	Structural, electrical, magnetic properties and electroresistance effect of La0.7Ba0.3Mn1-xMxO3 (M = Fe3+, Mo6+: x = 0, 0.01, 0.02, 0.03, 0.04) doped manganites / Muhammad Suffian Sazali
title_short	Structural, electrical, magnetic properties and electroresistance effect of La0.7Ba0.3Mn1-xMxO3 (M = Fe3+, Mo6+: x = 0, 0.01, 0.02, 0.03, 0.04) doped manganites / Muhammad Suffian Sazali
title_full	Structural, electrical, magnetic properties and electroresistance effect of La0.7Ba0.3Mn1-xMxO3 (M = Fe3+, Mo6+: x = 0, 0.01, 0.02, 0.03, 0.04) doped manganites / Muhammad Suffian Sazali
title_fullStr	Structural, electrical, magnetic properties and electroresistance effect of La0.7Ba0.3Mn1-xMxO3 (M = Fe3+, Mo6+: x = 0, 0.01, 0.02, 0.03, 0.04) doped manganites / Muhammad Suffian Sazali
title_full_unstemmed	Structural, electrical, magnetic properties and electroresistance effect of La0.7Ba0.3Mn1-xMxO3 (M = Fe3+, Mo6+: x = 0, 0.01, 0.02, 0.03, 0.04) doped manganites / Muhammad Suffian Sazali
title_sort	structural, electrical, magnetic properties and electroresistance effect of la0.7ba0.3mn1-xmxo3 (m = fe3+, mo6+: x = 0, 0.01, 0.02, 0.03, 0.04) doped manganites / muhammad suffian sazali
granting_institution	Universiti Teknologi MARA (UiTM)
granting_department	Faculty of Applied Sciences
publishDate	2022
url	https://ir.uitm.edu.my/id/eprint/72938/1/72938.pdf
_version_	1783735962713456640

Structural, electrical, magnetic properties and electroresistance effect of La0.7Ba0.3Mn1-xMxO3 (M = Fe3+, Mo6+: x = 0, 0.01, 0.02, 0.03, 0.04) doped manganites / Muhammad Suffian Sazali

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