TY - JOUR
T1 - Effects of metal substitution on superconductivity and crystal structure of HgBa2CuO4+δ
AU - Hu, W. Z.
AU - Yamamoto, A.
AU - Izumi, M.
AU - Tajima, S.
N1 - Funding Information:
This work was supported by New Energy and Industrial Technology Development Organization (NEDO) as Collaborative Research and Development of Fundamental Technologies for Superconductivity Applications.
Copyright:
Copyright 2007 Elsevier B.V., All rights reserved.
PY - 2001/1/7
Y1 - 2001/1/7
N2 - High-Tc superconducting oxides with nominal compositions of HgBa2Cu1-xMxO4+δ (M=Fe, Co, Ni, Zn and Mg, x=0-0.03) were prepared, and crystal structure and substitution effects on superconducting properties were studied using X-ray powder diffraction, susceptibility and resistivity. Almost all single-phase samples were obtained for M=Fe, Co, Zn and Mg, while impurities such as Ni3Ba3O8 were detected for M=Ni. A significant decrease in Tc and an increase in lattice parameter a for the samples with Zn and Mg indicated that these metals were successfully substituted for Cu. On the other hand, there was no remarkable change in Tc for the sample with Fe and Co, which suggests a possibility of substitution for Hg. Zn- and Mg-substitution effects on superconductivity were discussed from the viewpoint of structural change, in comparison with the cases of La2-xSrxCuO4 and YBa2Cu3O6+δ.
AB - High-Tc superconducting oxides with nominal compositions of HgBa2Cu1-xMxO4+δ (M=Fe, Co, Ni, Zn and Mg, x=0-0.03) were prepared, and crystal structure and substitution effects on superconducting properties were studied using X-ray powder diffraction, susceptibility and resistivity. Almost all single-phase samples were obtained for M=Fe, Co, Zn and Mg, while impurities such as Ni3Ba3O8 were detected for M=Ni. A significant decrease in Tc and an increase in lattice parameter a for the samples with Zn and Mg indicated that these metals were successfully substituted for Cu. On the other hand, there was no remarkable change in Tc for the sample with Fe and Co, which suggests a possibility of substitution for Hg. Zn- and Mg-substitution effects on superconductivity were discussed from the viewpoint of structural change, in comparison with the cases of La2-xSrxCuO4 and YBa2Cu3O6+δ.
KW - Crystal structure
KW - Hg-1201
KW - Mg-substitution
KW - Superconductivity
KW - Zn-substitution
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U2 - 10.1016/S0921-4534(01)00131-9
DO - 10.1016/S0921-4534(01)00131-9
M3 - Article
AN - SCOPUS:0035819253
SN - 0921-4534
VL - 356
SP - 141
EP - 148
JO - Physica C: Superconductivity and its Applications
JF - Physica C: Superconductivity and its Applications
IS - 1-2
ER -