Synthesis of Hg-based cuprate superconductors $HgBa_{2}Ca_{n-1}Cu_{n}O_{2(n+1)+δ}$ by CsCl flux additional method

Hiroshi Hara; Ryo Matsumoto; Shintaro Adachi; Aichi Yamashita; Hiroyuki Takeya; Yoshihiko Takano

paper

Synthesis of Hg-based cuprate superconductors $H g B a_{2} C a_{n - 1} C u_{n} O_{2 (n + 1) + δ}$ by CsCl flux additional method

arXiv:1902.05232

Abstract

We have succeeded in the synthesis of Re-doped $H g B a_{2} C a_{n - 1} C u_{n} O_{2 (n + 1) + δ}$ quickly by a sealed tube technique with a bit of CsCl flux. Powder X-ray diffraction measurement revealed that the single phases of Re-doped $H g B a_{2} C u O_{4 + δ}$ (Hg1201), $H g B a_{2} C a C u_{2} O_{6 + δ}$ (Hg1212), and $H g B a_{2} C a_{2} C u_{3} O_{8 + δ}$ (Hg1223) formed in 4 h. The sample grains exhibited plate-like crystals with the sizes of 20 $\times$ 20 $\times$ 1 $μ m^{3}$ and the chemical compositions of Hg1201, Hg1212, and Hg1223. The superconducting transitions were observed at 25 K for Hg1201, 122 for Hg1212, and 133 K for Hg1223 in the magnetic susceptibility. These results indicate that the developed method is useful for the fabrication of Hg-based superconducting wires.

10 pages, 6 figures

Synthesis of Hg-based cuprate superconductors HgBa2​Can−1​Cun​O2(n+1)+δ​ by CsCl flux additional method

Abstract

Synthesis of Hg-based cuprate superconductors $H g B a_{2} C a_{n - 1} C u_{n} O_{2 (n + 1) + δ}$ by CsCl flux additional method