Pulse-field magnetization (PFM) has been investigated for a bulk Sm-Ba-Cu-O superconductor cryo-cooled at 20 - 40 K using pulse magnetic fields
Bex of 3.83 - 6.07 T. The temperature rise
ΔT after applying the pulse fields increases as the bulk superconductor's initial temperature
Ts decreases and as the applied field
Bex increases. The generated heat
Q, estimated using
ΔT and the specific heat
C of the bulk superconductor, decreases with decreasing
Ts for lower
Bex (=3.83 T), but increases with decreasing
Ts for higher
Bex (≥5.53 T). There is a slight increase in the pinning loss
Qp determined from the magnetization
M vs the applied field
μ0Ha hysteresis curve at a lower
Ts. These results can be explained by the increase in pinning force
Fp at lower temperatures. The lowering of
Ts is one of the promising approaches for enhancing trapped field
BTP using PFM.
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