In:
physica status solidi (a), Wiley, Vol. 219, No. 14 ( 2022-07)
Abstract:
Herein, the microstructure and composition of the Ti‐ and Ta‐doped Nb 3 Al superconductor fabricated by rapid heating, quenching, and transformation (RHQT) process are compared. After rapid heating and quenching (RHQ) process, body‐centered cubic (bcc) phase is formed in all the wires, showing dark stripe and bright contrast morphology in the backscattered electron (BSE) images. After transformation heat‐treatment, all wires consist of A15 phase and show the same morphology as that of the quenched samples. Near‐stoichiometric composition is shown in 3 at% Ti‐ and Ta‐doped Nb 3 Al samples, but when doping amount is 10 at%, Ti‐doped sample has constant Nb content of 67 at% and Ta‐doped sample has Al + Ta content of 25 at%. Superconducting properties of both 3 at% Ti‐ and Ta‐doped Nb 3 Al samples are comparable and much superior than that of 10 at% doped samples, including critical temperature ( T c ), critical current density ( J c ), and irreversible field ( B irr ). Though 10 at% Ta‐doped Nb 3 Al has higher T c than 10 at% Ti‐doped sample, it presents wider Δ T c value and lower J c performance. When increasing the measurement temperature from 8 to 10 K, the decay ratio of B irr value for Ti‐doped Nb 3 Al superconductor follows the scaling law; however, the Ta‐doped samples are not the case.
Type of Medium:
Online Resource
ISSN:
1862-6300
,
1862-6319
DOI:
10.1002/pssa.v219.14
DOI:
10.1002/pssa.202200170
Language:
English
Publisher:
Wiley
Publication Date:
2022
detail.hit.zdb_id:
1481091-8
detail.hit.zdb_id:
208850-2
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