Ansari, Intikhab A. and Shahabuddin, M. and Alzayed, Nasser Saleh and Vajpayee, Arpita and Awana, V. P. S. and Kishan, H. (2010) Enhancement of activation energy in nano diamond doped MgB(2) superconductor. Physica C: Superconductivity, 470 (7-8). pp. 369-372. ISSN 0921-4534

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Abstract

Temperature dependence behavior of resistivity for nano diamond doped MgB2 superconductor was measured in different magnetic field 0 T ⩽ H ⩽ 8 T. Irreversibility (Hirr) is enhanced by nano diamond doping. We reveal that flux-creep activation energy is a nonlinear function of current density View the MathML source. In order to determine the activation energy of thermally activated flux flow, Arrhenius law has been taken into account. The magnetic field dependence of flux flow activation energy of nano diamond doped MgB2 superconductors was calculated from the slope of the linear part of the Arrhenius plot and found to be decrease corresponding with applied field. Therefore, the critical current density of this sample will need to be enhanced for practical applications.

Item Type:	Article
Additional Information:	Copyright for this article belongs to M/s Elsevier B.V.
Uncontrolled Keywords:	Magnesium diboride; Flux creep; Current density; Arrhenius law
Subjects:	Physics
Divisions:	UNSPECIFIED
Depositing User:	Ms Neetu Chandra
Date Deposited:	13 Apr 2012 08:26
Last Modified:	16 Apr 2012 06:43
URI:	http://npl.csircentral.net/id/eprint/132

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