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A neutron powder diffraction study of the superconductor Hg-1223 via Pb substitution
Condens. Matter 8(1996)3647-3652. Printed in the UK，-0001，（）：
The mercury-based superconductor Hg-1223 with Pb substituted for Hg has a transition temperature (T RD0 c, the zero-resistance temperature, 135K; T diac, the diamagnetic onset temperature, D 143K) higher than that for pure Hg-1223 compound. The structure of this Pb-doped sample has been nvestigated via neutron powder diffraction. Some selected bond distances are compared to those of Pb-free Hg-1223 cuprate. The contents of Pb and oxygen have been refined. The estimated valence of copper is about 2. 30, which is consistent with that for YBCO superconductor.
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