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Analysis of Temperature and Magnetic Field Distribution in Superconducting Bulk During Pulsed Field Magnetization

We have constructed the framework of theoretical simulation for magnetic field and temperature in the superconducting bulk during pulsed field magnetization (PFM) using finite element method (FEM). Three successive pulsed field applications with identical strength (SPA) were performed to the cryo-cooled bulk and time and spatial dependence of local field Bz(t,(z,r) and temperature T(t,(z,r) were calculated. The trapped field Bz increased and the maximum temperature rise Tmax decreased with increasing pulse number. The Bz enhancement results from the decrease in temperature rise because of the already trapped flux. The results of the simulation well reproduced the experimental ones qualitatively.