Remanent magnetisation in multifilamentary Bi-2223 tapes with filament bridging

One of the methods used for the separation of hysteresis and coupling losses in multifilamentary Bi-2223 tapes is based on the assumptions that hysteresis losses per unit length are independent of the sample length while coupling losses per unit length increase proportionally to the square of the sample length. We measured the remanent magnetic field of several multifilamentary Bi-2223 tape samples with different length using the I fall probe scanning technique, For most of the tapes, the remanent magnetic field, which is proportional to magnetisation. depended Oil the sample length. Only for a small number of tapes the sample length did not affect the remanent magnetisation. The observed behavior is attributed to the existence of filament bridging, (C) 2002 Elsevier Science B.V. All rights reserved,