Magnetic alignment in rare-earth substituted Bi-based 2212 superconducting materials

We put into evidence the magnetic anisotropy of rare-earth substituted Bi-based 2212 powder dispersed in epoxy resin at room temperature in a 4T magnetic induction. We have also realized the in situ magnetic field texturing at 0.6T during the recrystallization process of Bi2Sr2Ca0.8Dy0.2Cu2O8-y glassy precursors at different temperatures. X-ray diffraction analysis as well as electric resistance versus temperature measurements are presented. The results show the positive effect of the magnetic induction on the grain orientation. The optimum sintering temperature T is found to be between 930 and 950°C. © 1994.