Pulsed Field Magnetization for GdBaCuO Bulk With Stronger Pinning Characteristics
Pulsed Field Magnetization for GdBaCuO Bulk With Stronger Pinning Characteristics
复制标题
DOI：
10.1109/tasc.2009.2018081
复制
发表时间：
2009-06
影响因子：
1.8
通讯作者：
H. Fujishiro;T. Hiyama;T. Miura;T. Naito;S. Nariki;N. Sakai;I. Hirabayashi
中科院分区：
文献类型：
--
作者：
H. Fujishiro;T. Hiyama;T. Miura;T. Naito;S. Nariki;N. Sakai;I. Hirabayashi
采用脉冲场磁化（PFM）、顺序脉冲场磁化（SPA）和改进的多脉冲分步冷却技术（MMPSC），对具有较强钉扎特性（77 K时B T = 1.8 T）的GdBaCuO超导块材进行了Ts = 70 ~ 20 K的磁化。随着Ts的减小，钉扎力Fp增大，特别是在生长扇区边界（GSBs）处，体表面俘获场分布的不均匀性变得越来越明显.在低Ts下，SPA技术不一定是增强俘获场B T和总俘获通量Phi T的合适技术。然而，这些值可以通过MMPSC方法来增强。讨论了PFM过程中具有较强钉扎特性的体材料的性质。
The GdBaCuO superconducting bulk with stronger pinning characteristics (B T = 1.8 T at 77 K by the field cooled magnetization (FCM)) has been magnetized at T s = 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 decreasing T s, the pinning force F p increases 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 low T s, the SPA technique is not necessarily a suitable technique to enhance the trapped field B T and the total trapped flux Phi T. However, these values can be enhanced by the MMPSC method. The properties of the bulk with stronger pinning characteristics during PFM are discussed.