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language
eng
Author
Nakayama, F Shimane University, 1060 Nishikawatsu, Matsue, 690-8504, Japan
Description
In order to improve a critical current density (Jc) under applied magnetic fields, it is well known that the RE-Ba-Cu-O superconductors are required an improvement of a critical temperature (Tc). Although the Tc of REBa2Cu4O8 (RE124) is inferior to REBa2Cu3Oy (RE123), RE124 has rigorous stability of oxygen stoichiometry. Furthermore, the RE124 has an important advantage that the Tc was improved by Ca-doping. In this study, in order to improve Tc of RE124, we fabricated the Ca-doped RE124 (RECa124) films by using molten hydroxide method. The orientation of Y124 and YCa124 films showed a c-axis orientation completely and the Tc of YCa124 film showed 10 K higher than that of the Y124 film. However, GdCa124 and SmCa124 films contained RE123 phase by much compare with YCa124 films and the Tc were decreased with increasing of RE ionic radius over YCa124.
Subject
Superconducting film
Critical temperature
Molten hydroxide method
超伝導
Journal Title
Physics Procedia
Start Page
284
End Page
287
ISSN
1875-3892
Published Date
2012-04-21
DOI
Publisher
Elsevier B.V.
NII Type
Journal Article
OAI-PMH Set
Faculty of Science and Engineering
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