In:
Superconductor Science and Technology, IOP Publishing, Vol. 36, No. 6 ( 2023-06-01), p. 065001-
Abstract:
We prepared Nb 3 Al superconducting wires doped with nano-size SnO 2 (n-SiO 2 ) particles through a multi-time rapid heating and quenching process and investigated their microstructure and superconducting properties. All the samples showed a highly homogeneous A15 Nb 3 Al phase. Compared with pure Nb 3 Al, the n-SnO 2 doped Nb 3 Al wires presented a larger Δ T c value and a higher J c value. The best J c at 4.2 K was found in the 1 wt% n-SnO 2 doped Nb 3 Al sample, with 3.37 × 10 5 A cm −2 , 2.55 × 10 5 A cm −2 and 1.80 × 10 5 A cm −2 at 8 T, 10 T and 12 T, respectively. These results were an improvement of about 60% compared with pure Nb 3 Al at the same applied fields. The maximum irreversible field value was obtained in the 1 wt% SnO 2 -doped Nb 3 Al wire, with a result of 29.5 T at 4.2 K. The improvement of J c performance in the n-SnO 2 doped Nb 3 Al wires might be attributed to the formation of artificial nanoparticles in the grain, which act as extra effective flux pinning centers.
Type of Medium:
Online Resource
ISSN:
0953-2048
,
1361-6668
DOI:
10.1088/1361-6668/acc6f9
Language:
Unknown
Publisher:
IOP Publishing
Publication Date:
2023
detail.hit.zdb_id:
1361475-7