AC loss in stacks of Bi-2223/Ag tapes modified with ferromagnetic covers at the edges

作者：Safran S^*; Goemoery F; Gencer Ali

来源：Superconductor Science and Technology, 2010, 23(10): 105003.

DOI：10.1088/0953-2048/23/10/105003

We investigated the magnetization loss of stacked Bi-2223/Ag tapes with a ferromagnetic cover on the edges. Such modification has been found recently to reduce the AC loss of a single tape; however, the behavior in a coil winding could be different. With experiments and numerical calculations we show that a ferromagnetic cover on the edges of a superconducting tape could reduce its magnetization loss also when the tapes are arranged in a stack. The effect is weaker for larger numbers of tapes but nevertheless remained significant in a stack of four tapes, which was the maximum number studied here. The effects observed experimentally are nicely explained by the results of numerical calculations.

• 出版日期2010-10
• 单位中国科学院电工研究所