Fabrication of Tl
2
Ba
2
CaCu
2
O
8
superconducting films without thallium pellets
Xu Teng-Da
1
, Xing Jian
1
, Wang Li-Tian
1
, Zhang Jin-Li
1
, Zhao Sheng-Hui
1
, Xiong Yang
1
, Zhao Xin-Jie
1, 2
, Ji Lu
1, 2, †
, Zhang Xu
1
, He Ming
1
(a)
J
c
versus annealing temperature. (b)
J
c
versus annealing time.