Abstract
The influence of annealing in N 2 atmosphere on the superconductivity and normal states of a series Bi-system 2223 phase samples with high quality were studied by x-ray diffraction, thermal analysis and resistivity determination. It was discovered as the annealing time was increased, the critical temperature of the sample increased and the resistivity decreased. There was an optimum time for annealing. As the annealing time was longer than this optimum time, the converse result was obtained, namely, the increase in annealing time made the Tc decrease and resistivity increase. The experiment also showed that this effect was reversible. The Tc was suppressed by longer annealing time in N 2, but constrictive annealing in O 2, the original state could be recovered. The difference between these and some former results is discussed. Analyzing the results carefully, the relationship between Tc and resistivity, then the Tc and carrier concentration is well established.
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.
