Trapped magnetic field between double stacked MgB_2 bulks magnetized by pulsed field

摘要

Pulsed field magnetization (PFM) was performed at T_s=14 K for the double stacked MgB_2 bulks (bulk pair) 55 mm diameter fabricated by a reactive liquid Mg infiltration (Mg-RLI) method, compared with that for the single bulk. The trapped field of B_z=0.80 T was achieved between two bulks and B_z at the bulk surface was enhanced from 0.42 T to 0.50 T by stacking of the bulks. The trapped field characteristics of the bulk pair can be qualitatively explained by the model analyses.