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Journal of MaterialsVolume 2013 2013, Article ID 898607, 6 pages

Research Article

Thin Film Laboratory, Department of Physics, Indian Institute of Technology Delhi, New Delhi 110 016, India

IIMT college of Engineering, Maha Maya University, Greater Noida, Uttar Pradesh 201306, India

Received 18 November 2012; Revised 10 February 2013; Accepted 11 February 2013

Academic Editor: Ram Katiyar

Copyright © 2013 Suchitra Rajput and Sujeet Chaudhary. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


We report on the analyses of fluctuation induced excess conductivity in the - behavior in the in situ prepared MgB2 tapes. The scaling functions for critical fluctuations are employed to investigate the excess conductivity of these tapes around transition. Two scaling models for excess conductivity in the absence of magnetic field, namely, first, Aslamazov and Larkin model, second, Lawrence and Doniach model, have been employed for the study. Fitting the experimental - data with these models indicates the three-dimensional nature of conduction of the carriers as opposed to the 2D character exhibited by the HTSCs. The estimated amplitude of coherence length from the fitted model is ~21 Å.

Autor: Suchitra Rajput and Sujeet Chaudhary

Fuente: https://www.hindawi.com/


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