Anisotropy of Jc in Ex Situ MgB2/Fe Monofilamentary Tapes

Article Article scientifique Article Anisotropy of Jc in Ex Situ MgB2/Fe Monofilamentary Tapes eng 2005 author Lezza Paola 546645 author Gladyshevskii Roman 27288 author Senatore Carmine 0000-0002-9191-5016 561307 author Cusanelli Giuseppe 134267 author Suo Hong-Li 508351 author Flukiger René-Louis 25218 3196-3199 10.1109/TASC.2005.848789 1051-8223 http://ieeexplore.ieee.org/lpdocs/epic03/wrapper.htm?arnumber=1440350 Multifilamentary superconducting Nb3Sn wires are widely used for industrial applications. Wires processed by the Bronze Route technique are characterized by a large number of filaments Nb1−xSnx, with 0.18≤x≤0.25, corresponding to a distribution of Tc between<10 and 18 K. This distribution is a critical property of the wires and is important for the optimization of the conductors. However, it is not accessible to conventional techniques, due to percolation and/or magnetic shielding effects. In order to determine the Tc distribution in the sample, we have carried out specific heat measurements of various Nb3Sn multifilamentary wires (including the bronze matrix) in zero field and at 14 T. A deconvolution of the calorimetric data at the superconducting transition by means of a thermodynamical model was used for obtaining the distribution of Tc in the whole wire volume. The measurements were extended to Nb3Sn wires containing Ti additions, and the results were compared. The present calorimetric method is of primary importance for the complete characterization of Nb3Sn wires. Critical current density Critical current density anisotropy Ex situ tapes MgB2 Dewey 500.2 33 Département de physique de la matière quantique 131 35 Groupe de physique appliquée 135 false 679 Groupe Senatore IEEE transactions on applied superconductivity 15 2 db83b215-4c12-466c-8655-ddc3404f5964 Article (Published version) Restricted Senatore44.pdf 329766 application/pdf restrictedAccess Faculté des sciences / Section de physique / Département de physique de la matière quantique Faculté des sciences / Section de physique / Groupe de physique appliquée

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Anisotropy of J_c in Ex Situ MgB₂/Fe Monofilamentary Tapes	IEEE transactions on applied superconductivity			2005	622	0

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Cusanelli, Giuseppe