Abstract
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.
| Original language | English |
|---|---|
| Pages (from-to) | 13-18 |
| Number of pages | 6 |
| Journal | Physica C: Superconductivity and its Applications |
| Volume | 265 |
| Issue number | 1-2 |
| Publication status | Published - 1996 Jul 1 |
| Externally published | Yes |
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ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Energy Engineering and Power Technology
- Electrical and Electronic Engineering
Cite this
Dependence of superconducting properties on the Cu-valence determined by iodometry in HgBa2CuO4+δ . / Fukuoka, A.; Yamamoto, Ayako; Itoh, M.; Usami, R.; Adachi, S.; Yamauchi, H.; Tanabe, K.
In: Physica C: Superconductivity and its Applications, Vol. 265, No. 1-2, 01.07.1996, p. 13-18.Research output: Contribution to journal › Article
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TY - JOUR
T1 - Dependence of superconducting properties on the Cu-valence determined by iodometry in HgBa2CuO4+δ
AU - Fukuoka, A.
AU - Yamamoto, Ayako
AU - Itoh, M.
AU - Usami, R.
AU - Adachi, S.
AU - Yamauchi, H.
AU - Tanabe, K.
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.
UR - http://www.scopus.com/inward/record.url?scp=0030189451&partnerID=8YFLogxK
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M3 - Article
VL - 265
SP - 13
EP - 18
JO - Physica C: Superconductivity and its Applications
JF - Physica C: Superconductivity and its Applications
SN - 0921-4534
IS - 1-2
ER -