Temperature dependence of ac losses and self-field critical currents in Nb3Sn
- 15 December 1974
- journal article
- conference paper
- Published by AIP Publishing in Applied Physics Letters
- Vol. 25 (12) , 756-758
- https://doi.org/10.1063/1.1655389
Abstract
Ac losses and self‐field critical currents were measured in a Nb3Sn tape between 4.2 and 17 K. The observed dependence of losses on current at 4.2 K is adequately reproduced by assuming a surface barrier ΔH = 710 Oe and a bulk critical current density Jc = 5.7×106 A/cm2. The temperature dependence of losses above 4.2 K can also be reproduced by taking into account the observed parabolic dependence of Jc on temperature and by postulating a [1 − (T/Tc)4] dependence for ΔH. A new technique is described for measuring the critical current.Keywords
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