Superconducting bulk magnets: Very high trapped fields and cracking

By S. Gruss, G. Fuchs, G. Krabbes, P. Verges, G. Stover, K. Muller, J. Fink, L. Schultz. 2001

160 citations recorded by the source corpus.

Improved trapped fields are reported for bulk melt-textured YBa2Cu3O7−δ (YBCO) material in the temperature range between 20 and 50 K. Trapped fields up to 12.2 T were obtained at 22 K on the surface of single YBCO disks (with Ag and Zn additions). In YBCO minimagnets, maximum trapped fields of 16 T (at 24 K) and of 11,2 T (at 47 K) were achieved using (Zn+Ag) and Zn additions, respectively. In all cases, the YBCO disks were encapsulated in steel tubes in order to reinforce the material against the large tensile stress acting during the magnetizing process and to avoid cracking. We observed cracking not only during the magnetizing process, but also as a consequence of flux jumps due to thermomagnetic instabilities in the temperature range betweeen 20 and 30 K.

Subfields: Biomedical Engineering, Condensed Matter Physics, Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/24eddebc4d64f5a5bfe626219d778674c3fc90c2

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

1. M. Ainslie
2. J. Durrell
3. F. Werfel
4. U. Floegel-Delor
5. R. Rothfeld
6. T. Riedel
7. D. Cardwell
8. B. Goebel

Citations in the corpus

• Superconductor bearings, flywheels and transportation (2011, methodology): “The successful laboratory fabrication of YBCO and REBCO (RE = Sm, Dy, Gd and Nd) single-grain bulk material is well understood in the last decade [1–6] whereby YBCO is the ‘working horse’.”
• A trapped field of 17.6 T in melt-processed, bulk Gd-Ba-Cu-O reinforced with shrink-fit steel (2014, background): “Fuchs et al also reported a trapped field of 16 T at 24 K in a Zr-doped and Ag-impregnated YBCO sample of 25 mm diameter placed inside a reinforcing stainless-steel tube [7].”