Fluctuation induced conductivity of polycrystalline MgB2 superconductor

被引：0
作者：
Intikhab A. Ansari
V. P. S. Awana
Rajeev Rawat
M. Shahabuddin
M. Husain
H. Kishan
A. V. Narlikar
机构：
[1] Jamia Millia Islamia (Central University),Department of Physics
[2] National Physical Laboratory,undefined
[3] UGC-DAE Consortium for Scientific Research,undefined
来源：
Journal of Materials Science | 2007年 / 42卷
关键词：
Polycrystalline Sample; Temperature Derivative; Boron Isotope; MgB2 Superconductor; Anomalous Magnetic Field;
D O I：
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中图分类号：
学科分类号：
摘要：
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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页码：6306 / 6309
页数：3
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