Fluctuation induced conductivity of polycrystalline MgB2 superconductor

Ansari, Intikhab A. ; Awana, V. P. S. ; Rawat, Rajeev ; Shahabuddin, M. ; Husain, M. ; Kishan, H. ; Narlikar, A. V. (2007) Fluctuation induced conductivity of polycrystalline MgB2 superconductor Journal of Materials Science, 42 (15). pp. 6306-6309. ISSN 0022-2461

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Official URL: http://www.springerlink.com/content/y32t4w83325325...

Related URL: http://dx.doi.org/10.1007/s10853-006-1174-5


We report fluctuation-induced conductivity (FIC) of the polycrystalline MgB2 superconductor in the presence of magnetic field. The results are described in terms of the temperature derivative of the resistivity, dρ/dT. The dρ/dT peak temperature observed for H = 0 Tesla at 39 K remains very distinct under applied fields of 6 Tesla and 8 Tesla at 22 and 20 K respectively. Aslamazov and Larkin (AL) equations are used to explain the anisotropic nature of the polycrystalline MgB2. The effective coherence length, ξp (0) determined experimentally is 55.17 Å, which roughly matches with previously reported experimental work.

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