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LA1BA2CU3O9-γ: Structural Analysis as Determined by Neutron Diffraction

Published online by Cambridge University Press:  28 February 2011

J. P. Golben ,
YI Song ,
S. Chittipeddi ,
S. I. Lee ,
R. D. Mcmichael ,
X. D. Chen ,
J. R. Gaines ,
D. L. Cox  and
A. J. Epstein
J. P. Golben
Affiliation:
Department of Physics, The Ohio State University, 174 W. 18th Ave., Columbus, Ohio, 43210
YI Song
Affiliation:
Department of Physics, The Ohio State University, 174 W. 18th Ave., Columbus, Ohio, 43210
S. Chittipeddi
Affiliation:
Department of Physics, The Ohio State University, 174 W. 18th Ave., Columbus, Ohio, 43210
S. I. Lee
Affiliation:
Department of Physics, The Ohio State University, 174 W. 18th Ave., Columbus, Ohio, 43210
R. D. Mcmichael
Affiliation:
Department of Physics, The Ohio State University, 174 W. 18th Ave., Columbus, Ohio, 43210
X. D. Chen
Affiliation:
Department of Physics, The Ohio State University, 174 W. 18th Ave., Columbus, Ohio, 43210
J. R. Gaines
Affiliation:
Department of Physics, The Ohio State University, 174 W. 18th Ave., Columbus, Ohio, 43210
D. L. Cox
Affiliation:
Department of Physics, The Ohio State University, 174 W. 18th Ave., Columbus, Ohio, 43210
A. J. Epstein
Affiliation:
Department of Physics, The Ohio State University, 174 W. 18th Ave., Columbus, Ohio, 43210
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Extract

The La-Ba-Cu-O system contains several phases of special interest in the field of high Tc superconductivity. Specifically intriguing is the La3−xBa3+xCu6O4+y (“3–3–6”) phase [1,2], the La1·8 5Ba·1 5CuO4 (‘K2NiF4’) phase with a zero resistance temperature (Tc) of about 20 K [3,4], and the La1Ba2CU3O9–6 (“1–2–3”) phase with Tc's reported up to 75 K [5–7]. It has been suggested that the “3–3–6” phase may also be superconducting, especially in a Ba-doped version such that the stoichiometry is 2–4–6 [8–10]. In addition to defining a new high temperature superconducting phase, this latter suggestion would also rule out the possibility of Cu-0 “chains” being important to 90 K superconductivity since these chains are absent in the proposed configuration [1,2] of this phase.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 99: Symposium AA – High-Temperature Superconductors , 1987 , 895
Copyright
Copyright © Materials Research Society 1988

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References

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