TY - JOUR
T1 - High-pressure synthesis of single-phase superconductors HgzSrxBa2-xCa2Cu3O8+δ and (Hg, M)Sr2Ca2Cu3Oy with MPb and Mo
AU - He, Z. H.
AU - Lin, Q. M.
AU - Gao, L.
AU - Sun, Y. Y.
AU - Xue, Y. Y.
AU - Chu, C. W.
N1 - Funding Information:
The authors would like to thank R.L. Meng for providing some of the precursors and Y. Cao for doing the susceptibility measurements. This work is supported in part by NSF Grant No. DMR-91-22043, USAFOSR Grant No. F49620-93-1-0310 by BMDO, EPRI, the State of Texas through the Texas Center for Superconductivity at the University of Houston, and the T.L.L. Temple Foundation.
PY - 1995/1/15
Y1 - 1995/1/15
N2 - The recent observation of superconductivity above 160 K under high pressures has prompted us to investigate the possibility of retaining such high-temperature superconductivity at ambient pressure by substituting Sr for Ba in HgBa2Ca2Cu3O8 (Hg-1223). High-purity (≥90%) Hg-1223 phase samples were synthesized with a nominal composition of HgzSrxBa2-xCa2Cu3 O8+δ (where z=0.75 and x=0, 0.5 or 1). By adding a second element, Pb or Mo, supposedly to the Hg site, (Hg,Pb/Mo)Sr2Ca2Cu2 O8+δ with purity up to 90% was achieved. Unfortunately, Tc decreases with Sr substitution. The roles of Sr in the phase stability, and the synthesis conditions of the Sr based Hg-1223, and the Sr substitution effect on the Tc of these samples will be discussed.
AB - The recent observation of superconductivity above 160 K under high pressures has prompted us to investigate the possibility of retaining such high-temperature superconductivity at ambient pressure by substituting Sr for Ba in HgBa2Ca2Cu3O8 (Hg-1223). High-purity (≥90%) Hg-1223 phase samples were synthesized with a nominal composition of HgzSrxBa2-xCa2Cu3 O8+δ (where z=0.75 and x=0, 0.5 or 1). By adding a second element, Pb or Mo, supposedly to the Hg site, (Hg,Pb/Mo)Sr2Ca2Cu2 O8+δ with purity up to 90% was achieved. Unfortunately, Tc decreases with Sr substitution. The roles of Sr in the phase stability, and the synthesis conditions of the Sr based Hg-1223, and the Sr substitution effect on the Tc of these samples will be discussed.
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U2 - 10.1016/0921-4534(94)02318-2
DO - 10.1016/0921-4534(94)02318-2
M3 - Article
AN - SCOPUS:58149326619
SN - 0921-4534
VL - 241
SP - 211
EP - 218
JO - Physica C: Superconductivity and its applications
JF - Physica C: Superconductivity and its applications
IS - 3-4
ER -