Size dependence of the trapped magnetic field in large single-grained Gd-Ba-Cu-O bulk superconductors

11th European Conference on Applied Superconductivity

Teshima, H.^1 ; Morita, M.^1

Nippon Steel and Sumitomo Metal, 20-1 Shintomi, Futtsu, Chiba

293-8511, Japan^1

关键词: Bulk superconductors;    Crystal growth mechanism;    Different sizes;    Peak height;    Sample sizes;    Size dependence;    Trapped field;    Trapped magnetic field;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/507/1/012048/pdf
DOI  :  10.1088/1742-6596/507/1/012048

来源: IOP

【 摘 要 】

Based on careful consideration to crystal growth mechanism, three different sizes of Gd-Ba-Cu-O cylindrical bulk superconductors have been fabricated. The trapped magnetic field proportionally increased with the sample size and the peak heights at 77 K were 0.91-0.95 T, 1.38-1.51 T and 1.91-2.03 T for samples 30 mm, 46 mm and 64.5 mm in diameter, respectively. In addition, macroscopic Jc of approximately 13,000 A/cm2was estimated for all samples with different sizes. Such a high value of macroscopic Jcand the liner increase of trapped fields with size can be ascribed to excellent quality of large single-grained Gd-Ba-Cu-O bulk superconductors.