Pulsed Field Magnetization for GdBaCuO Bulk With Stronger Pinning Characteristics

The GdBaCuO superconducting bulk with stronger pinning characteristics (BT= 1.8 T at 77 K by the field cooled magnetization (FCM)) has been magnetized atTs= 70 - 20 K by the pulsed field magnetization (PFM) techniques; a sequential pulsed-field application (SPA) and a modified multi pulse technique with stepwise cooling (MMPSC). With decreasingTs, the pinning forceFpincreases especially at the growth sector boundaries (GSBs), and then the nonuniformity of the trapped field profile becomes more and more conspicuous on the bulk surface. At lowTs, the SPA technique is not necessarily a suitable technique to enhance the trapped fieldBTand the total trapped fluxPhiT. However, these values can be enhanced by the MMPSC method. The properties of the bulk with stronger pinning characteristics during PFM are discussed.