Abstract
Vertical magnetic fields up to 9 T were applied to the magnetic melt-processing (MMP) of dip-coated and Ag-sheathed Bi2212 mono-core tapes with a core thickness of about 150 μm, which were set horizontally. SEM observation shows that a uniform high-degree of texture is formed throughout the thickness of the tapes by the magnetic field H a during MMP, whereas a large portion of the area is non-textured without H a. The critical current density J c of the tapes increases with increasing H a up to about 6 T due to the texture development. However, when H a>6 T some disturbance in J c appears; one is increased and the other is decreased. This may be due to the change of O 2 atmosphere around the tapes during MMP, which comes from the change of O 2 gas flowing by the magnetic field. The results suggest that a high magnetic field is very effective to enhance the texture development and to fabricate tapes with high critical current I c.
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