A trapped field of 13.4 T in a stack of HTS tapes with 30 \mu m substrate

TL;DR

This paper demonstrates that stacking HTS tapes can trap magnetic fields up to 13.4 T, nearing bulk superconductor performance, through field cooling and pulsed magnetization techniques.

Contribution

It introduces a novel method of achieving high trapped fields in HTS tape stacks, significantly improving previous results and approaching bulk superconductor capabilities.

Findings

Trapped flux of 13.4 T achieved in HTS tape stacks.

70% improvement over previous HTS tape stack results.

Approaching record values of bulk superconductors.

Abstract

Superconducting bulk (RE)Ba$_2$Cu$_3$O$_{7-x}$ materials (RE-rare earth elements) have been successfully used to generate magnetic flux densities in excess of 17 T. This work investigates an alternative approach by trapping flux in stacks of second generation high temperature superconducting tape from several manufacturers using field cooling and pulsed field magnetisation techniques. Flux densities of up to 13.4 T were trapped by field cooling at ~5 K between two 12 mm square stacks, an improvement of 70% over previous value achieved in an HTS tape stack. The trapped flux approaches the record values in (RE)BCO bulks and reflects the rapid developments still being made in the HTS tape performance.