Influence of rare earth (Nd,Er) doping on electrical and structural properties of low density Bi₁.₆Pbₒ.₄Sr₂Ca₂₋ₓREₓCu₃08 superconductors prepared via coprecipitation technique / Noor Syuhaida Ibrahim

The influence on electrical and structural properties of rare earth elements (Nd and Er) doped on low density Bii.6Pbo.4Sr2Ca2-xRExCu5 where x = 0.000, 0.025, 0.050, 0.100 and 0.200 is investigated. In determining the best level of sucrose, the samples were prepared via co-precipitation method with...

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Main Author:	Ibrahim, Noor Syuhaida
Format:	Thesis
Language:	English
Published:	2016
Subjects:	Metal oxide semiconductors
Online Access:	https://ir.uitm.edu.my/id/eprint/79452/1/79452.pdf
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id	my-uitm-ir.79452
record_format	uketd_dc
spelling	my-uitm-ir.794522023-09-08T04:04:56Z Influence of rare earth (Nd,Er) doping on electrical and structural properties of low density Bi₁.₆Pbₒ.₄Sr₂Ca₂₋ₓREₓCu₃08 superconductors prepared via coprecipitation technique / Noor Syuhaida Ibrahim 2016 Ibrahim, Noor Syuhaida Metal oxide semiconductors The influence on electrical and structural properties of rare earth elements (Nd and Er) doped on low density Bii.6Pbo.4Sr2Ca2-xRExCu5 where x = 0.000, 0.025, 0.050, 0.100 and 0.200 is investigated. In determining the best level of sucrose, the samples were prepared via co-precipitation method with mixing of C12H22O11 (O.OOg, 0.05g, 0.10g and 0.015g) with standard Bii.6Pbo.4Sr2Ca2Cus. For all series of standard samples, the best Tc zer0 obtained was at 98 K which belongs to low density sample (S3) with addition of 0.10 g sucrose. Comparing to standard high density sample SI (O.OOg), the low density sample S3 (0.1 Og) exhibited higher critical current density Jc, by three folds. The XRD results confirmed that low density sample represented by S3 remains in tetragonal structure which indicate that adding sucrose into the samples did not change its crystal structure. For all Nd-doped and Er-doped samples, the curves of normalized resistance displayed normal metallic behavior above Tc onset. However, Tc Zero decreased for all doped samples due to increase in dopant concentration. Substitution smaller size of Nd3+ (1.123A) and Er2+ (1.03A) on Ca2+ (1.14A) has distorted the lattice structure which leads to the decrease of Tc zer0. Field Emission Scanning Electron Microscope (FESEM) and Energy Dispersive X-ray (EDX) were performed to determine the surface morphology and the composition of elements of the samples respectively. FESEM results showed that the grains are compacted and randomly distributed and as the concentration of dopant is increased. The misorientation at grain boundaries have formed weak links and hence limit the values of Jc. 2016 Thesis https://ir.uitm.edu.my/id/eprint/79452/ https://ir.uitm.edu.my/id/eprint/79452/1/79452.pdf text en public masters Universiti Teknologi MARA (UiTM) Faculty of Applied Sciences Hashim@Ismail, Azhan
institution	Universiti Teknologi MARA
collection	UiTM Institutional Repository
language	English
advisor	Hashim@Ismail, Azhan
topic	Metal oxide semiconductors
spellingShingle	Metal oxide semiconductors Ibrahim, Noor Syuhaida Influence of rare earth (Nd,Er) doping on electrical and structural properties of low density Bi₁.₆Pbₒ.₄Sr₂Ca₂₋ₓREₓCu₃08 superconductors prepared via coprecipitation technique / Noor Syuhaida Ibrahim
description	The influence on electrical and structural properties of rare earth elements (Nd and Er) doped on low density Bii.6Pbo.4Sr2Ca2-xRExCu5 where x = 0.000, 0.025, 0.050, 0.100 and 0.200 is investigated. In determining the best level of sucrose, the samples were prepared via co-precipitation method with mixing of C12H22O11 (O.OOg, 0.05g, 0.10g and 0.015g) with standard Bii.6Pbo.4Sr2Ca2Cus. For all series of standard samples, the best Tc zer0 obtained was at 98 K which belongs to low density sample (S3) with addition of 0.10 g sucrose. Comparing to standard high density sample SI (O.OOg), the low density sample S3 (0.1 Og) exhibited higher critical current density Jc, by three folds. The XRD results confirmed that low density sample represented by S3 remains in tetragonal structure which indicate that adding sucrose into the samples did not change its crystal structure. For all Nd-doped and Er-doped samples, the curves of normalized resistance displayed normal metallic behavior above Tc onset. However, Tc Zero decreased for all doped samples due to increase in dopant concentration. Substitution smaller size of Nd3+ (1.123A) and Er2+ (1.03A) on Ca2+ (1.14A) has distorted the lattice structure which leads to the decrease of Tc zer0. Field Emission Scanning Electron Microscope (FESEM) and Energy Dispersive X-ray (EDX) were performed to determine the surface morphology and the composition of elements of the samples respectively. FESEM results showed that the grains are compacted and randomly distributed and as the concentration of dopant is increased. The misorientation at grain boundaries have formed weak links and hence limit the values of Jc.
format	Thesis
qualification_level	Master's degree
author	Ibrahim, Noor Syuhaida
author_facet	Ibrahim, Noor Syuhaida
author_sort	Ibrahim, Noor Syuhaida
title	Influence of rare earth (Nd,Er) doping on electrical and structural properties of low density Bi₁.₆Pbₒ.₄Sr₂Ca₂₋ₓREₓCu₃08 superconductors prepared via coprecipitation technique / Noor Syuhaida Ibrahim
title_short	Influence of rare earth (Nd,Er) doping on electrical and structural properties of low density Bi₁.₆Pbₒ.₄Sr₂Ca₂₋ₓREₓCu₃08 superconductors prepared via coprecipitation technique / Noor Syuhaida Ibrahim
title_full	Influence of rare earth (Nd,Er) doping on electrical and structural properties of low density Bi₁.₆Pbₒ.₄Sr₂Ca₂₋ₓREₓCu₃08 superconductors prepared via coprecipitation technique / Noor Syuhaida Ibrahim
title_fullStr	Influence of rare earth (Nd,Er) doping on electrical and structural properties of low density Bi₁.₆Pbₒ.₄Sr₂Ca₂₋ₓREₓCu₃08 superconductors prepared via coprecipitation technique / Noor Syuhaida Ibrahim
title_full_unstemmed	Influence of rare earth (Nd,Er) doping on electrical and structural properties of low density Bi₁.₆Pbₒ.₄Sr₂Ca₂₋ₓREₓCu₃08 superconductors prepared via coprecipitation technique / Noor Syuhaida Ibrahim
title_sort	influence of rare earth (nd,er) doping on electrical and structural properties of low density bi₁.₆pbₒ.₄sr₂ca₂₋ₓreₓcu₃08 superconductors prepared via coprecipitation technique / noor syuhaida ibrahim
granting_institution	Universiti Teknologi MARA (UiTM)
granting_department	Faculty of Applied Sciences
publishDate	2016
url	https://ir.uitm.edu.my/id/eprint/79452/1/79452.pdf
_version_	1783736281606389760

Influence of rare earth (Nd,Er) doping on electrical and structural properties of low density Bi₁.₆Pbₒ.₄Sr₂Ca₂₋ₓREₓCu₃08 superconductors prepared via coprecipitation technique / Noor Syuhaida Ibrahim

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