Title :
The critical current of NbTi multifilamentary wire: a comparison between critical current densities using AC magnetization techniques ( JCM) and DC transport measurement (JCT ) throughout the superconducting phase
Author :
Hampshire, D.P. ; Larbalestier, D.C.
Author_Institution :
Appl. Superconductivity Center, Wisconsin Univ., Madison, WI, USA
fDate :
3/1/1989 12:00:00 AM
Abstract :
AC magnetization measurements are presented for transverse field orientation on a NbTi standard reference material supplied by the National Bureau of Standards. These data, generated in DC background fields for the range 0<B<10 T, and 4.2 K<T<Tc, are interpreted using the Bean-Campbell analysis to determine the critical current density (J cm) throughout the superconducting phase. An estimate of the electric field criterion at which transport critical current (J ct) measurements must be compared with Jcm is determined. Good agreement is obtained for the field and temperature dependence of the critical current using these complementary techniques
Keywords :
composite superconductors; critical current density (superconductivity); electrical conductivity of crystalline metals and alloys; fibre reinforced composites; magnetisation; niobium alloys; titanium alloys; type II superconductors; AC magnetization; Bean-Campbell analysis; DC transport; NbTi multifilamentary wire; critical current; critical current densities; electric field criterion; field dependence; superconducting phase; temperature dependence; transverse field orientation; Critical current; DC generators; Magnetic field measurement; Magnetic materials; Magnetization; Measurement standards; NIST; Niobium compounds; Titanium compounds; Wire;
Journal_Title :
Magnetics, IEEE Transactions on
