Longitudinal uniformity of commercial Bi2223 tapes characterized by scanning Hall-probe microscopy
Longitudinal uniformity of commercial Bi2223 tapes characterized by scanning Hall-probe microscopy
复制标题
通过扫描霍尔探针显微镜表征商用 Bi2223 胶带的纵向均匀性
DOI：
10.1109/tasc.2010.2091615
复制
发表时间：
2011
影响因子：
1.8
通讯作者：
T. Makihara、S. Sakamoto、A. Oota
中科院分区：
文献类型：
--
作者：
R. Inada、S. Baba、R. Ohtsu;T. Makihara、S. Sakamoto、A. Oota
用有效面积为50μm×50μm的扫描霍尔探针显微镜研究了日本住友电机株式会社研制的长度为1m、高临界电流Ic150A(77K，自场)的商用Bi2223带材的剩余磁场分布。测量采用裸胶带和三层加强型不锈钢胶带。在距磁带表面0.5 mm的固定距离下，使用SHM测量了垂直于磁化磁带宽面的剩馀磁场Brzin的分布。尽管增强带的Brz值绝对值比裸带低10%，但沿带横向的Brz轮廓形状几乎不受增强的影响，并且沿每条带的长度均匀分布。此外，我们还从每条磁带上切下15厘米的样品，测量了弯曲直径为30 mm的双面弯曲前后的Brz曲线。结果表明，增强带在强度和纵向均匀性方面的劣化比裸带要小得多。
We investigated remanent field distributions for commercial Bi2223 tapes with length of 1 m and high critical current Icof 150 A (77 K, self-field) developed by Sumitomo Electric Industries (SEI) Ltd., by scanning Hall-probe microscopy (SHM) with an active area of 50μm × 50μm. All tapes are prepared by powder-in-tube process and sintered by controlled-over pressure (CT-OP) processing at final sintering stage. A bare tape and a 3-ply reinforced one with stainless tape laminations were used for measurements. The distribution of remanent field Brzin perpendicular to broader face of a magnetized tape was measured using SHM, at a fixed distance of 0.5 mm away from a tape surface. Although absolute Brzvalues in a reinforced tape were 10% lower than bare one, the shape of Brzprofile along a lateral direction of a tape was hardly affected by reinforcement and uniformly distributed along a length of each tape. Moreover, we cut away 15 cm piece sample from each tape and measured Brzprofile before and after double-sided bending with a bending diameter of 30 mm. The results indicated that degradation in both intensity and longitudinal uniformity of Brzfor a reinforced tape is much smaller than for a bare one.