In. Gubkin et al., EXPERIMENTAL INVESTIGATION OF COPPER MATRIX LONGITUDINAL RESISTANCE IN A COMPOSITE NB-TI WIRE, IEEE transactions on magnetics, 30(4), 1994, pp. 2372-2374
Copper-matrix longitudinal resistance was studied as a function of wir
e diameter on specimens of multifilamentary Nb-Ti wire with filaments
coated by a Nb layer. Experimental results are compared with the Sondh
eimer calculations for a monofilament conductor as well as with the Ga
valloni calculations for an ideal wire with hexagonally located filame
nts. It has been shown that the best fit with the experiment is provid
ed by the Sondheimer approximation. Comparison of the results of this
work with other authors' data obtained for the specimens with no niobi
um barrier, allows us to single out the influence of a pure size effec
t and diffusion of Ti on the resistivity