TY - JOUR
T1 - Synthesis and start cation-composition of HgBa2CuO4+δ
AU - Xiong, Q.
AU - Chan, F. T.
AU - Xue, Y. Y.
AU - Chu, C. W.
N1 - Funding Information:
This work at the Universityo f Arkansasi s supported in part by NSF DMR 9318946, the High Density Electronics Center at the University of Arkansas, DARPA (Contract No. MDA 972-90-J-1001) throughT exasCenter for Superconductivitayt the University of Houston (TCSUH). This work at TCSUH is supportedb y NSF Grant No. DMR 91-22043, USAFOSR GRANT No. F49620-93-1-0310 by BMDO, EPRI RP-8066-04, the State of Texas throughT CSUH, and the T.L.L. Temple Foundation
PY - 1995/11/1
Y1 - 1995/11/1
N2 - The synthesis conditions of HgBa2CuO4 + δ were studied. It was observed that the best phase purity was achieved at an apparent cation ratio of Hg:Ba:Cu = 0.7:2:1 that was obtained by either Hg deficient initial compositions or extra Hg absorbents, e.g. Au foil. No significant impurities or site mixing can be identified by X-ray/neutron powder diffraction investigations in these non-stoichiometric samples. However, their large paramagnetic background suggests the existence of (Ba, Cu) oxides. Our data also show that this apparent Hg deficiency is likely to be synthesis-reaction related.
AB - The synthesis conditions of HgBa2CuO4 + δ were studied. It was observed that the best phase purity was achieved at an apparent cation ratio of Hg:Ba:Cu = 0.7:2:1 that was obtained by either Hg deficient initial compositions or extra Hg absorbents, e.g. Au foil. No significant impurities or site mixing can be identified by X-ray/neutron powder diffraction investigations in these non-stoichiometric samples. However, their large paramagnetic background suggests the existence of (Ba, Cu) oxides. Our data also show that this apparent Hg deficiency is likely to be synthesis-reaction related.
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U2 - 10.1016/0921-4534(95)00525-0
DO - 10.1016/0921-4534(95)00525-0
M3 - Article
AN - SCOPUS:0029403743
SN - 0921-4534
VL - 253
SP - 329
EP - 333
JO - Physica C: Superconductivity and its applications
JF - Physica C: Superconductivity and its applications
IS - 3-4
ER -