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
N1 - Funding Information:
We are indebted to M. Osawa of University of Tsukuba for his kind help in the neutron diffraction experiment. We also thank A. Ichinose of CRIEPI for his helpful discussion. This work was partially supported by NEDO.
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
AN - SCOPUS:0026854480
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 -