Fluctuation induced conductivity of polycrystalline MgB2 superconductor |
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| Authors: | Intikhab A. Ansari V. P. S. Awana Rajeev Rawat M. Shahabuddin M. Husain H. Kishan A. V. Narlikar |
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| Affiliation: | (1) Department of Physics, Jamia Millia Islamia (Central University), New Delhi, 110025, India;(2) National Physical Laboratory, Dr. K.S. Krishnan Marg, New Delhi, 110012, India;(3) UGC-DAE Consortium for Scientific Research, University Campus, Khandwa Road, Indore, 452017, MP, India |
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| Abstract: | 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, ξ p (0) determined experimentally is 55.17 Å, which roughly matches with previously reported experimental work. |
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