Abstract
The trapped field properties during pulsed-field magnetization (PFM) have been investigated numerically using three different assumptions relating to the J c( B , T ) characteristics (Jirsa, Kim, and Bean models) and compared with experimental results. The trapped field properties using the Jirsa model with the so-called “peak effect,” in which a realistic J c( B , T ) is assumed, rather than the Kim model, result in a more realistic numerical simulation. The trapped field properties using a Kim model with a monotonically decreasing J c( B ) also show similar results to those using the Jirsa model. The trapped field properties using a Bean model, for which J c is independent of magnetic field, are not necessarily enhanced because of a larger temperature rise. The numerical results suggest it is necessary to fabricate REBaCuO bulks with J c( B , T ) characteristics with moderate magnetic field and temperature dependences to enhance the trapped field by PFM.
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