Trapping a magnetic field of 17.89 T in stacked coated conductors by suppression of flux jumps

Authors

Masahiro Suyama, Sunseng Pyon, Yasuhiro Iijima, Satoshi Awaji, and Tsuyoshi Tamegai

Abstract
We have successfully trapped a field of 17.89 T at 6.5 K at the center of a compact coated-conductor (CC) stacks (13 x 12 x 11.7 mm³) within 75 min by suppressing flux jumps. The CC stack consists of 200 sheets of EuBa₂Cu₃O₇ CCs with BaHfO₃ nanorods to increase the critical current density at high fields and low temperatures. To enhance thermomagnetic stability, the central 50 CCs are coated with 1 µm thick Pb with large specific heat at low temperatures. Numerical calculations based on the actual J_c–H characteristics reproduces the trapped field quantitatively. New directions for achieving even higher trapped field at higher temperatures and making use of the trapped field are discussed.

Superconductor Science and Technology：https://iopscience.iop.org/article/10.1088/1361-6668/ac4560