Influence of NbO₂ and SnO₂ additions on the properties of YBa₂Cu₃Oˍδ bulk superconductor synthesised via thermal treatment method

YBa2Cu3O7-δ bulk sample had been synthesized using thermal treatment method. The microstructure and superconducting properties of the sample with the addition of NbO2 and SnO2 were studied. Both additions improve the resistance-temperature, R-T properties with smaller superconducting transition, ΔT...

Full description

Saved in:

Bibliographic Details
Main Author:	Mohd Yusuf, Nur Nabilah
Format:	Thesis
Language:	English
Published:	2018
Subjects:	Superconductors Heat treatment Thermal analysis
Online Access:	http://psasir.upm.edu.my/id/eprint/76624/1/FS%202018%2053%20IR.pdf
Tags:	Add Tag No Tags, Be the first to tag this record!

id	my-upm-ir.76624
record_format	uketd_dc
spelling	my-upm-ir.766242020-01-30T08:06:42Z Influence of NbO₂ and SnO₂ additions on the properties of YBa₂Cu₃Oˍδ bulk superconductor synthesised via thermal treatment method 2018-04 Mohd Yusuf, Nur Nabilah YBa2Cu3O7-δ bulk sample had been synthesized using thermal treatment method. The microstructure and superconducting properties of the sample with the addition of NbO2 and SnO2 were studied. Both additions improve the resistance-temperature, R-T properties with smaller superconducting transition, ΔT compared to pure sample. While alternating current susceptibility, ACS measurement showed degradation of intergranular coupling with enhanced intragranular pinning strength in NbO2 added sample, enhanced coupling is observed in SnO2 added sample. Among the added sample, maximum Josephson current, Io is found to be the highest in 0.8 wt% NbO2 (131.44 μA) and 0.4 wt% SnO2 (664.42 μA) compared to pure sample (146.05 μA). Xray diffraction analysis revealed that NbO2 added sample leads to the formation of YBa2NbO6 phase while SnO2 addition reduces the Y211 secondary phase in the Y123 sample. Y123 phase is found to enhanced with SnO2 addition up to 95.8 % (0.4 wt%) compared to 91.5% in pure sample. The scanning electron microscope, SEM images showed an increase in grain size as both addition increases. Sponge-like grain structures is observed in NbO2 and is randomly distributed across the sample pertained to YBa2NbO6 phase while SnO2 addition causes Sn to precipitate on the surface sample and agglomerates at the grain boundaries. Here, SnO2 addition seems to have the upper hand as the overall current transport in high Tc is governed by the intergranular coupling where weak links is associated. Superconductors Heat treatment Thermal analysis 2018-04 Thesis http://psasir.upm.edu.my/id/eprint/76624/ http://psasir.upm.edu.my/id/eprint/76624/1/FS%202018%2053%20IR.pdf text en public masters Universiti Putra Malaysia Superconductors Heat treatment Thermal analysis
institution	Universiti Putra Malaysia
collection	PSAS Institutional Repository
language	English
topic	Superconductors Heat treatment Thermal analysis
spellingShingle	Superconductors Heat treatment Thermal analysis Mohd Yusuf, Nur Nabilah Influence of NbO₂ and SnO₂ additions on the properties of YBa₂Cu₃Oˍδ bulk superconductor synthesised via thermal treatment method
description	YBa2Cu3O7-δ bulk sample had been synthesized using thermal treatment method. The microstructure and superconducting properties of the sample with the addition of NbO2 and SnO2 were studied. Both additions improve the resistance-temperature, R-T properties with smaller superconducting transition, ΔT compared to pure sample. While alternating current susceptibility, ACS measurement showed degradation of intergranular coupling with enhanced intragranular pinning strength in NbO2 added sample, enhanced coupling is observed in SnO2 added sample. Among the added sample, maximum Josephson current, Io is found to be the highest in 0.8 wt% NbO2 (131.44 μA) and 0.4 wt% SnO2 (664.42 μA) compared to pure sample (146.05 μA). Xray diffraction analysis revealed that NbO2 added sample leads to the formation of YBa2NbO6 phase while SnO2 addition reduces the Y211 secondary phase in the Y123 sample. Y123 phase is found to enhanced with SnO2 addition up to 95.8 % (0.4 wt%) compared to 91.5% in pure sample. The scanning electron microscope, SEM images showed an increase in grain size as both addition increases. Sponge-like grain structures is observed in NbO2 and is randomly distributed across the sample pertained to YBa2NbO6 phase while SnO2 addition causes Sn to precipitate on the surface sample and agglomerates at the grain boundaries. Here, SnO2 addition seems to have the upper hand as the overall current transport in high Tc is governed by the intergranular coupling where weak links is associated.
format	Thesis
qualification_level	Master's degree
author	Mohd Yusuf, Nur Nabilah
author_facet	Mohd Yusuf, Nur Nabilah
author_sort	Mohd Yusuf, Nur Nabilah
title	Influence of NbO₂ and SnO₂ additions on the properties of YBa₂Cu₃Oˍδ bulk superconductor synthesised via thermal treatment method
title_short	Influence of NbO₂ and SnO₂ additions on the properties of YBa₂Cu₃Oˍδ bulk superconductor synthesised via thermal treatment method
title_full	Influence of NbO₂ and SnO₂ additions on the properties of YBa₂Cu₃Oˍδ bulk superconductor synthesised via thermal treatment method
title_fullStr	Influence of NbO₂ and SnO₂ additions on the properties of YBa₂Cu₃Oˍδ bulk superconductor synthesised via thermal treatment method
title_full_unstemmed	Influence of NbO₂ and SnO₂ additions on the properties of YBa₂Cu₃Oˍδ bulk superconductor synthesised via thermal treatment method
title_sort	influence of nbo₂ and sno₂ additions on the properties of yba₂cu₃oˍδ bulk superconductor synthesised via thermal treatment method
granting_institution	Universiti Putra Malaysia
publishDate	2018
url	http://psasir.upm.edu.my/id/eprint/76624/1/FS%202018%2053%20IR.pdf
_version_	1747813173544615936

Influence of NbO₂ and SnO₂ additions on the properties of YBa₂Cu₃Oˍδ bulk superconductor synthesised via thermal treatment method

Similar Items