| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an iron-based superconductor having a higher super-conductive transition temperature. <P>SOLUTION: The iron-based superconductor is produced by partially substituting Fe of an FeAs plane with another element in the iron-based super conductor having the FeAs plane and by introducing atomic vacancies in order to administer codoping. Especially, the iron-based superconductor is made into Ca(Fe<SB POS="POST">1-x</SB>Pt<SB POS="POST">x</SB>)<SB POS="POST">2-δ</SB>As<SB POS="POST">2</SB>by setting 0.3≤x≤0.4 and 0.4≤δ≤0.6. The iron-based superconductor is produced by a process for mixing raw materials being calcium, iron, and arsenic in a molar ratio of 1:(1-x)(2-δ):x(2-δ):2 and a process for sintering mixed raw materials. <P>COPYRIGHT: (C)2012,JPO&INPIT |
