Comparison of Jc characteristics in PIT wires based on BaFe2As2 with different substitutions

11th European Conference on Applied Superconductivity

Tamegai, T.^1 ; Pyon, S.^1 ; Ding, Q.P.^1 ; Inoue, H.^1 ; Kobayashi, H.^1 ; Tsuchiya, Y.^1 ; Sun, Y.^1 ; Kajitani, H.^2 ; Koizumi, N.^2

Department of Applied Physics, University of Tokyo, Hongo, Bunkyo-ku, Tokyo

113-8656, Japan^1

Fusion Reserc. and Development Dirctort., JAEA, 801-1 Mukoyama, Naka-shi, Ibaraki

311-0193, Japan^2

关键词: Ambient pressures;    Magnetooptical imaging;    Powder-in-tube method;    Self field;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/507/2/022041/pdf
DOI  :  10.1088/1742-6596/507/2/022041

来源: IOP

【 摘 要 】

Three kinds of superconducting wires based on BaFe2As2with different substitutions are fabricated using powder-in-tube method and characterized including magneto-optical imaging. In the case of (Ba,K)Fe2As2wires processed by hot isostatic press, critical current density (Jc) of 32 kA/cm2has been achieved at 4.2 K under self-field. Wires fabricated in a similar way with Ba(Fe,Co)2As2resulted in much lower Jcof 7.8 kA/cm2at 4.2 K under self-field. In the case of BaFe2(As,P)2, Jcof ambient-pressure processed wire has Jcof only 1.0 kA/cm2at 4.2 K under self-field. Origins of these differences are discussed.