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The Effect of Second Phase Additions on the Microstructure and Bulk Pinning Force in {\rm Nb}_{3}{\rm Sn} PIT Wire

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3 Author(s)
Motowidlo, L.R. ; SupraMagnetics, Inc., Plantsville, CT, USA ; Lee, P.J. ; Larbalestier, D.C.

The effect of second phase gadolinium and yttrium additions on the microstructure and the bulk pinning force are reported for PIT Nb3Sn mono-wires. High resolution SEM of the grain morphology show smaller grain size for mono-wires with the second phase additions after 750degC and 850degC heat treatment compared to control samples. The bulk pinning force properties are determined from magnetization measurements at 9 K which allow the whole pinning force curve to be seen.

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Applied Superconductivity, IEEE Transactions on  (Volume:19 ,  Issue: 3 )