Abstract
(Pb,Cu) (Sr,Nd)2(Ho,Ce)2Cu2Oz (z≈8.64) was made superconducting by heating at 500°C in O2 at a pressure of 90 atm. This oxide had a transition temperature (Tc) around 10 K. Its structure parameters were refined by the Rietveld method using neutron powder diffraction data. This compound belongs to space group 14/mmm and has a tetragonal unit cell with lattice constants, a=0.382496(8) nm and c=2.89862(7) nm. Atoms in fluorite-type layers and CuO2 planes are firmly bound at their ideal positions, whereas a (Pb,Cu)O monolayer is highly disordered and defective. In addition, an apical oxygen site in a [CuO5] pyramid is about 13% deficient. Such lattice instability in this oxide is discussed in connection with structural defects in other copper oxides.
| Original language | English |
|---|---|
| Pages (from-to) | 73-80 |
| Number of pages | 8 |
| Journal | Physica C: Superconductivity and its applications |
| Volume | 193 |
| Issue number | 1-2 |
| DOIs | |
| Publication status | Published - 1992 Apr 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
Structural properties of (Pb,Cu) (Sr,Nd)2(Ho,Ce)2Cu2O9-δ. / Maeda, Toshihiko; Sakai, Naomichi; Izumi, Fujio; Wada, Takahiro; Yamauchi, H.; Asano, Hajime; Tanaka, Shoji.
In: Physica C: Superconductivity and its applications, Vol. 193, No. 1-2, 01.04.1992, p. 73-80.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Structural properties of (Pb,Cu) (Sr,Nd)2(Ho,Ce)2Cu2O9-δ
AU - Maeda, Toshihiko
AU - Sakai, Naomichi
AU - Izumi, Fujio
AU - Wada, Takahiro
AU - Yamauchi, H.
AU - Asano, Hajime
AU - Tanaka, Shoji
PY - 1992/4/1
Y1 - 1992/4/1
N2 - (Pb,Cu) (Sr,Nd)2(Ho,Ce)2Cu2Oz (z≈8.64) was made superconducting by heating at 500°C in O2 at a pressure of 90 atm. This oxide had a transition temperature (Tc) around 10 K. Its structure parameters were refined by the Rietveld method using neutron powder diffraction data. This compound belongs to space group 14/mmm and has a tetragonal unit cell with lattice constants, a=0.382496(8) nm and c=2.89862(7) nm. Atoms in fluorite-type layers and CuO2 planes are firmly bound at their ideal positions, whereas a (Pb,Cu)O monolayer is highly disordered and defective. In addition, an apical oxygen site in a [CuO5] pyramid is about 13% deficient. Such lattice instability in this oxide is discussed in connection with structural defects in other copper oxides.
AB - (Pb,Cu) (Sr,Nd)2(Ho,Ce)2Cu2Oz (z≈8.64) was made superconducting by heating at 500°C in O2 at a pressure of 90 atm. This oxide had a transition temperature (Tc) around 10 K. Its structure parameters were refined by the Rietveld method using neutron powder diffraction data. This compound belongs to space group 14/mmm and has a tetragonal unit cell with lattice constants, a=0.382496(8) nm and c=2.89862(7) nm. Atoms in fluorite-type layers and CuO2 planes are firmly bound at their ideal positions, whereas a (Pb,Cu)O monolayer is highly disordered and defective. In addition, an apical oxygen site in a [CuO5] pyramid is about 13% deficient. Such lattice instability in this oxide is discussed in connection with structural defects in other copper oxides.
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U2 - 10.1016/0921-4534(92)90871-9
DO - 10.1016/0921-4534(92)90871-9
M3 - Article
VL - 193
SP - 73
EP - 80
JO - Physica C: Superconductivity and its Applications
JF - Physica C: Superconductivity and its Applications
SN - 0921-4534
IS - 1-2
ER -