Effect of tin doping in BSCCO superconductors to its physical and superconducting properties

Sim, Irene Mei Mei (2005) Effect of tin doping in BSCCO superconductors to its physical and superconducting properties. Universiti Malaysia Sabah. (Unpublished)

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Abstract

A series of tin doped Bi�.₆Pb₀.₄Sr₂(Ca�₋XSnX)Cu₃Oδ superconducting samples, with tin concentration ranging from 0 to 0.20, were prepared using the sol-gel methodology. The samples were sintered at 850 °C for 150 hours. The effect of tin doping on the critical temperature, structure and microstructural of these samples were investigated by the three characterization test, namely the Four Point Probe equipment, the X-ray Diffraction (XRD) equipment and the Scanning Electron Microscope (SEM). Evaluation of the results produced by these characterization tests indicated that the incorporation of tin (stanun) into the calcium site for the samples has led to a deterioration effect on both the transition temperature and the high temperature phase (2223) of the samples. As the tin doping concentration increases, the co-existence of the high temperature phase (2223) and the low temperature phase (2212) of the samples becomes more obvious. The morphology studies of the samples showed that there are brittle, flaky, porous and plate-liked grains widely distributed all over the surface of the sample. And as the tin doping concentration increases, the grains become more cluster and compact. All the results show that there is a correlation existed between the transition temperatures, phases, the microstructures and the starting material compounds. And thus this concluded that the doping of tin has indeed attribute to the physical and superconducting properties of the BSCCO samples.

Item Type: Academic Exercise
Uncontrolled Keywords: sol-gel methodology, temperature, Four Point Probe equipment, X-ray Diffraction, Scanning Electron Microscope, stanum, BSCCO
Subjects: Q Science > QC Physics
Divisions: SCHOOL > School of Science and Technology
Depositing User: MDM SITI AZIZAH IDRIS
Date Deposited: 08 Jan 2014 02:46
Last Modified: 10 Oct 2017 08:13
URI: http://eprints.ums.edu.my/id/eprint/7986

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