TY - JOUR
T1 - Superconductivity, structure and resistivity in HgBa2Ca2Cu3O8+δ
AU - Huang, Z. J.
AU - Meng, R. L.
AU - Qiu, X. D.
AU - Sun, Y. Y.
AU - Kulik, J.
AU - Xue, Y. Y.
AU - Chu, C. W.
N1 - Funding Information:
Technicahl elpi n the preparatioonf t hep recursors by L. Beauvaisa ndH. Zhangis greatlya ppreciated. The work is supportedin part by NSF Grant No. DMR 91-22043U, SAFOSR Grant No. F49620-93-1-0310D, ARPA GrantN o. MDA 972-88-G-002th, e Stateo f Texast hrough thTee xasC enterf or Super-conductivitayt the Universityo f Houston antdh e T.L.L. TempleF oundation.
PY - 1993/11/10
Y1 - 1993/11/10
N2 - Samples of HgBa2Ca2Cu3O8+δ were successfully prepared and investigated. By examining the X-ray diffraction, transmission electron microscopy, magnetization and resistivity, we found that HgBa2Ca2Cu3O8+δ possesses an orthorhombic structure with lattice parameters a=5.451 (2)Å, b=5.432 (2)Å and c=15.826 (7) Å and a sharp superconducting transition (magnetically determined) at ∼112 K as-synthesized and as high as ∼135 K after oxygenation. The resistivity vanishes below 134 K, the highest reported for any superconductor to date. No superstructures of the types previously reported in the > 130 K samples were detected in this study. A linear T-dependent resistivity which is interpolated to zero at 0 K was also observed above ∼240 K. Below ∼240 K, deviation from such a linearity appears, which may be attributable to the fluctuation or spin-scattering effect, assuming that the behavior is intrinsic to HgBa2Ca2Cu3O8+δ.
AB - Samples of HgBa2Ca2Cu3O8+δ were successfully prepared and investigated. By examining the X-ray diffraction, transmission electron microscopy, magnetization and resistivity, we found that HgBa2Ca2Cu3O8+δ possesses an orthorhombic structure with lattice parameters a=5.451 (2)Å, b=5.432 (2)Å and c=15.826 (7) Å and a sharp superconducting transition (magnetically determined) at ∼112 K as-synthesized and as high as ∼135 K after oxygenation. The resistivity vanishes below 134 K, the highest reported for any superconductor to date. No superstructures of the types previously reported in the > 130 K samples were detected in this study. A linear T-dependent resistivity which is interpolated to zero at 0 K was also observed above ∼240 K. Below ∼240 K, deviation from such a linearity appears, which may be attributable to the fluctuation or spin-scattering effect, assuming that the behavior is intrinsic to HgBa2Ca2Cu3O8+δ.
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U2 - 10.1016/0921-4534(93)90786-P
DO - 10.1016/0921-4534(93)90786-P
M3 - Article
AN - SCOPUS:0027695401
SN - 0921-4534
VL - 217
SP - 1
EP - 5
JO - Physica C: Superconductivity and its applications
JF - Physica C: Superconductivity and its applications
IS - 1-2
ER -