TY - JOUR
T1 - Dependence of superconducting properties on the Cu-valence determined by iodometry in HgBa2CuO4+δ
AU - Fukuoka, A.
AU - Tokiwa-Yamamoto, A.
AU - Itoh, M.
AU - Usami, R.
AU - Adachi, S.
AU - Yamauchi, H.
AU - Tanabe, K.
N1 - Funding Information:
The authorsw ouldlike to thankS . Tanakaf or his continuouse ncouragemenant d M. Karppinenf or helpful discussionsT. he work was supportedb y NEDO for R&D of IndustriaSl ciencea ndTechnol-ogy FrontierP rogram.
PY - 1996/7/1
Y1 - 1996/7/1
N2 - We have synthesized nearly single-phase HgBa2CuO4+δ samples with various oxygen contents, and systematically investigated the relationship between the lattice parameters, the superconductivity transition temperature (Tc) and the oxygen content determined by iodometry. Furthermore, the nominal copper valence values were calculated from the oxygen content data by assuming constant valence values of +2.00 and -2.00 for mercury and oxygen, respectively. Both the a and c lattice parameters were found to decrease monotonically with the Cu valence over a wide range of +2.05-2.28. The obtained Tc versus Cu valence curve exhibits a "bell shaped" correlation with the maximum in Tc at the Cu valence of ∼ +2.18.
AB - We have synthesized nearly single-phase HgBa2CuO4+δ samples with various oxygen contents, and systematically investigated the relationship between the lattice parameters, the superconductivity transition temperature (Tc) and the oxygen content determined by iodometry. Furthermore, the nominal copper valence values were calculated from the oxygen content data by assuming constant valence values of +2.00 and -2.00 for mercury and oxygen, respectively. Both the a and c lattice parameters were found to decrease monotonically with the Cu valence over a wide range of +2.05-2.28. The obtained Tc versus Cu valence curve exhibits a "bell shaped" correlation with the maximum in Tc at the Cu valence of ∼ +2.18.
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U2 - 10.1016/0921-4534(96)00288-2
DO - 10.1016/0921-4534(96)00288-2
M3 - Article
AN - SCOPUS:0030189451
SN - 0921-4534
VL - 265
SP - 13
EP - 18
JO - Physica C: Superconductivity and its Applications
JF - Physica C: Superconductivity and its Applications
IS - 1-2
ER -