We found a match
Your institution may have rights to this item. Sign in to continue.
- Title
Improved Uniformity of Superconducting Properties in GdBCO Superconductor Bulk with a Buffer Layer.
- Authors
ZHANG, Y.; ZHANG, Y. F.; SHEN, S. Y.; WANG, W. L.; RUAN, G. J.; LI, Y.; ZHANG, J. Y.; ZHANG, P. H.; LOU, Z. W.; PENG, L.; ZHOU, D. F.
- Abstract
Uneven distribution of local superconducting properties can significantly impact the overall performance of REBa2Cu3O7-δ (REBCO or RE123) superconductor bulks. Through the modified top-seeded melt-texture growth method, we successfully prepared single-domain GdBa2Cu3O7-δ (GdBCO) superconductor bulks with (bulk A) and without (bulk B) a buffer layer, and investigated the relationship between superconducting properties and microstructure of the bulks in detail. Measurement results show that the maximum trapped flux density value of bulk A is 0.48 T, and that of bulk B is 0.5 T. The distribution of transition temperature (TC) and critical current density (JC) becomes more uniform along the c- and a/b-directions in bulk A. In bulk B, i.e., without a buffer layer, the JC varies greatly at different locations due to microstructural inhomogeneity. The buffer layer acting as a large seed can increase the growth rate, resulting in a decrease in the size and an increase in the concentration of Gd2BaCuO5 (Gd211) particles in the microstructure according to pushing/trapping and coarsening theory. The corresponding JC performance shows a certain improvement in all fields, which suggests that the buffer layer has a positive effect on the spatial uniformity of superconducting properties in superconductor bulks.
- Subjects
BUFFER layers; FLUX pinning; CRITICAL currents; TRANSITION temperature; SUPERCONDUCTORS
- Publication
Acta Physica Polonica: A, 2024, Vol 146, Issue 2, p195
- ISSN
0587-4246
- Publication type
Article
- DOI
10.12693/APhysPolA.146.195