Transport and magnetic Jc of MgB2 strands and small helical coils

Sumption, M. D.; Bhatia, M.; Rindfleisch, M.; Tomsic, M.; Collings, E. W.
March 2005
Applied Physics Letters;3/7/2005, Vol. 86 Issue 10, p102501
Academic Journal
The critical current densities of MgB2 monofilamentary strands with and without SiC additions were measured at 4.2 K. Additionally, magnetic Jc at B=1 T was measured from 4.2 to 40 K. Various heat treatment times and temperatures were investigated for both short samples and small helical coils. SiC additions were seen to improve high field transport Jc at 4.2 K, but improvements were not evident at 1 T at any temperature. Transport results were relatively insensitive to heat treatment times and temperatures for both short samples and coils in the 700–900 °C range.


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