2011/03/09 by Qing-Ping Ding, Shyam Mohan, Yuji Tsuchiya +4
Business, Management and Accounting · Materials Science · Physics and Astronomy · #Condensed matter physics #Corporate Taxation and Avoidance #Critical current #Critical field #Crystallite #Current density #Iron-based superconductors research #Materials science #Metallurgy #Optics #Penetration depth #Physics #Superconductivity #cond-mat.supr-con
paper · pdf · doi:10.1088/0953-2048/24/7/075025
12 pages, 6 figures
arxiv created 2011/03/09 · openalex publication_date 2011/06/09 · arxiv updated 2015/05/27 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We have prepared high-quality polycrystalline FeTe0.5Se0.5 at temperature as low as 550degC. The transport critical current density evaluated by the current-voltage characteristics is over 700 A/cm2 at 4.2 K under zero field, which is several times larger than FeTe0.5Se0.5 superconducting wires. The critical current density estimated from magneto-optical images of flux penetration is also similar to this value. The upper critical field of the polycrystalline FeTe0.5Se0.5 at T = 0 K estimated by Werthamer-Helfand-Hohenberg theory is 585 kOe, which is comparable to that of single crystals. This study gives some insight into how to improve the performance of FeTe0.5Se0.5 superconducting wires.