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AC susceptibility of the sintered Bi1.6Pb0.4Sr2(Ca1-xMx)2Cu3Oδbulk high-Tc superconductors

Published online by Cambridge University Press:  18 March 2011

Malik I Adam ,
Abdul Halim Shaari ,
Zainul A Hassan  and
Kaida Khalid
Malik I Adam
Affiliation:
Universiti Putra Malaysia, Department of Physics, 43400, Serdang, Selangor, MALAYSIA
Abdul Halim Shaari
Affiliation:
Universiti Putra Malaysia, Department of Physics, 43400, Serdang, Selangor, MALAYSIA
Zainul A Hassan
Affiliation:
Universiti Putra Malaysia, Department of Physics, 43400, Serdang, Selangor, MALAYSIA
Kaida Khalid
Affiliation:
Universiti Putra Malaysia, Department of Physics, 43400, Serdang, Selangor, MALAYSIA
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Abstract

AC susceptibility measurements as a function of temperature, frequency and applied ac field amplitude were performed on two rectangular bar shaped samples of nominal composition Bi1.6Pb0.4Sr2(Ca1-xMx)2Cu3Oδ, with M=Pr, Gd, and x=0.01, obtained by the usual solid state reaction route. The incorporation of the rare earth elements at low concentration stage results in an improvement of grain connectivity for the sample doped with Pr. On the other end, the ac field amplitude and frequency dependence of the susceptibility curves disclosed bulk pinning hystersis loss feature. The potential barrier height, activation energy at the grain boundary extracted from the low temperature peak revealed that flux creep is governing the pinning mechanism inside the samples. Qualitative discussion in the framework of the critical state model was highlighted

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 689: Symposium E – Materials for High-Temperature Superconductor Technologies , 2001 , E3.8
Copyright
Copyright © Materials Research Society 2002

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