Journal
PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS
Volume 401, Issue 1-4, Pages 310-315Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.physc.2003.09.061
Keywords
bulk MgB2; flux flow; critical current density; activation energy; n-factor
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The reactive liquid infiltration (RLI) technique, applied to-the MgB2 material, has allowed us to obtain either bulk or wire samples of good transport properties. The evaluation of the voltage-current characteristics, V-I-n, for typical samples, measured by transport at temperatures between 4.2 and 30 K, is presented. The behaviour of the n exponent is discussed in terms of a simple model and the differences between bulk and wire samples are outlined. (C) 2003 Elsevier B.V. All rights reserved.
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