A trapped field of 17.7T in a stack of high temperature superconducting tape

作者：Patel Anup^*; Baskys Algirdas; Mitchell Williams Tom; McCaul Aoife; Coniglio William; Haenisch Jens; Lao Mayraluna; Glowacki Bartek A

来源：Superconductor Science and Technology, 2018, 31(9): 09LT01.

DOI：10.1088/1361-6668/aad34c

• trapped field
• magnetisation
• HTS tape
• stack of tapes
• YBCO

High temperature superconducting (HTS) tape can be cut and stacked to generate large magnetic fields at cryogenic temperatures after inducing persistent currents in the superconducting layers. A field of 17.7 T was trapped between two stacks of HTS tape at 8 K with no external mechanical reinforcement. 17.6 T could be sustained when warming the stack up to 14 K. A new type of hybrid stack was used consisting of a 12mm square insert stack embedded inside a larger 34.4mm diameter stack made from different tape. The magnetic field generated is marginally higher than the previous trapped field record achieved by a bulk HTS magnet and 30% greater than previously achieved in a stack of HTS tapes. Such stacks are being considered for superconducting motors as rotor field poles where the cryogenic penalty is justified by the increased power to weight ratio. The sample reported can be considered the strongest permanent magnet ever created.

• 出版日期2018-9