Abstract
Magnesium oxide powders with average particle size 20 and 40 nm were added into Bi1.6Pb0.4Sr2Ca2Cu3O10 (Bi,Pb-2223) with nominal composition Bi1.6Pb0.4Sr2Ca2Cu3O10(MgO) x (x=0–0.15 wt.%). The transport critical current density (J c) and transition temperature were determined using the four-probe method. The structure and microstructure were examined by X-ray diffraction method and scanning electron microscopy, respectively. The transition temperature and J c increased with nanosized MgO addition. The 20 nm MgO added samples showed a higher J c compared with the 40 nm MgO added samples. J c was higher as size of MgO was closer to the coherence length of the superconductor. These results showed that the size variation of flux pinning center at the nanoscale is important in enhancing J c.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
