Reduction of alternating magnetic field losses in high-Tc multifilament Bi(2223)/Ag tapes by high resistive barriers

✍ Scribed by K. Kwasnitza; S. Clerc; R. Flükiger; Y. Huang

• Publisher: Elsevier Science
• Year: 1999
• Tongue: English
• Weight: 589 KB
• Volume: 39
• Category: Article
• ISSN: 0011-2275
• DOI: 10.1016/s0011-2275(99)00113-7

✦ Synopsis

Flat High-T c multi®lament tapes with an Ag matrix have very large coupling current losses in perpendicularly applied 50 Hz magnetic ®elds. By the application of ceramic isolating BaZrO 3 -and SrZrO 3 barriers around the ®laments we could reduce at 77 K the coupling current decay time constant to 1.5 ms, leading to a signi®cant loss reduction at 25 Hz and a noticeable loss reduction at 50 Hz. The coupling loss maximum for small DB values was shifted for a stack of six tapes to 110 Hz and for a single tape to 180 Hz. By a further combined application of several loss reduction measures the application of High-T c superconductors in 50 Hz magnets will be possible in the next future.