Microstructure and Dynamic Magnetic Properties of Thallium-Based Superconductors

Shaari, Abdul Talib (2002) Microstructure and Dynamic Magnetic Properties of Thallium-Based Superconductors. Masters thesis, Universiti Putra Malaysia.

[img] PDF
1376Kb

Abstract

Ac susceptibility study is one of the best methods in characterizing bulk superconductors. Four systems (A, B, C and D) of Thallium-based bulk superconductors were analyzed using this method. They were A = (TlO.8SCrO.lS) Sr2 (Ca1-xPrx)CU2O7,B=(Tl0.85Cr0.15)Sr2(Ca1-xNdx)Cu2O7, C=(Tl0.85Cr0.15)Sr2(Ca1-xPrx)Cu2O7,and D=(Tl0.85Cr0.15)Sr2(Sr1-xPrx)Cu2O7. The Temperature dependent ac susceptibility curves and field dependent ac susceptibility curves were obtained using Lake Shore AC Susceptometer Model 7000. The dimensions of each sample were 2mmx2mmxlOmm. Certain ranges of temperatures were identified from temperature dependent ac susceptibility curves for use in plotting the field dependent ac susceptibility curves for each sample. The applied fields (0.1 - 10 Oersted) were not high enough to observe the contributions from intragranular supercurrents. Therefore the data obtained were from the intergranular matrix. Bean's Model is used to explain the dynamic magnetic properties that resulted from the data Tc, Tp and Tcj that were obtained from temperature dependent ac susceptibility curves. 10 was calculated from Tc and Tcj using the Ambegaokar-Baratoff formula and Jc (T) were

Item Type:Thesis (Masters)
Subject:Superconductors - Magnetic properties
Subject:Magnetic susceptibility
Chairman Supervisor:Professor Dr. Abdul Halim Shaari
Call Number:FSAS 2002 54
Faculty or Institute:Faculty of Science and Environmental Studies
ID Code:9524
Deposited By: Muizzudin Kaspol
Deposited On:14 Feb 2011 01:30
Last Modified:01 Oct 2013 03:49

Repository Staff Only: Edit item detail

Document Download Statistics

This item has been downloaded for since 14 Feb 2011 01:30.

View statistics for "Microstructure and Dynamic Magnetic Properties of Thallium-Based Superconductors"


Universiti Putra Malaysia Institutional Repository

Universiti Putra Malaysia Institutional Repository is an on-line digital archive that serves as a central collection and storage of scientific information and research at the Universiti Putra Malaysia.

Currently, the collections deposited in the IR consists of Master and PhD theses, Master and PhD Project Report, Journal Articles, Journal Bulletins, Conference Papers, UPM News, Newspaper Cuttings, Patents and Inaugural Lectures.

As the policy of the university does not permit users to view thesis in full text, access is only given to the first 24 pages only.