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19 April 2024

» arxiv » cond-mat/0512046

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Effects of neutron irradiation on polycrystalline Mg11B2
C. Tarantini ; H.U. Aebersold ; V. Braccini ; G. Celentano ; C. Ferdeghini ; V. Ferrando ; U. Gambardella ; F. Gatti ; E. Lehmann ; P. Manfrinetti ; D. Marre’ ; A. Palenzona ; I. Pallecchi ; I. Sheikin ; A.S. Siri ; M. Putti ;
Date:	2 Dec 2005
Subject:	Superconductivity; Materials Science
Abstract:	We studied the influence of the disorder introduced by neutron irradiation on polycrystalline MgB2 material. Structural and transport properties showed that thermal neutrons are effective in creating disorder and the use of 11B in the sample preparation avoid self shielding effects. Irradiation leads to an improvement in both upper critical field and critical current density for an exposition level in the range 1-2*1018 cm-2. Increasing fluence the superconducting properties are depressed. An in-depth analysis of the critical field and current density behaviour has been carried out to identify what scattering and pinning mechanisms come into play. Finally the correlation between some characteristic lengths and the transition width is analysed.
Source:	arXiv, cond-mat/0512046
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