Crystal structure of the high Tc (107 K) superconducting phase in Pb-Bi-Sr-Ca-Cu-O

Rong, T. S.; Shi, F.; Wu, X. F.; Zhu, T. J.; Shi, Z. H.; Du, J.; Zhou, S. Z.; Shi, N. C.
May 1989
Applied Physics Letters;5/22/1989, Vol. 54 Issue 21, p2157
Academic Journal
The crystal structure of the high Tc superconducting phase in a Pb-doped Bi-Sr-Ca-Cu-O system (nominal composition Pb0.3Bi1.7Sr2Ca3Cu4OY) with a zero-resistance temperature of 107 K was determined with transmission electron microscopy. The investigation shows that the crystal structure, which is different from the Pb-free one, is monocline with dimensions a=0.532 nm, b=0.383 nm, c=3.71 nm, α=β=90° and γ=134.8°. A distinct change of wave vector of incommensurate modulation was also observed.


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