Structural study of Sr{sub 2}CuO{sub 3+delta} by neutron powder diffraction | Zendy

Yuichi Shimakawa | Zendy; J. D. Jorgensen | Zendy; J. F. Mitchell | Zendy; B. A. Hunter | Zendy; S. Shaked | Zendy; D. G. Hinks | Zendy; R. L. Hitterman | Zendy; Zenji Hiroi | Zendy; M. Takano | Zendy

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Structural study of Sr{sub 2}CuO{sub 3+delta} by neutron powder diffraction

Author(s) -

Yuichi Shimakawa,

J. D. Jorgensen,

J. F. Mitchell,

B. A. Hunter,

S. Shaked,

D. G. Hinks,

R. L. Hitterman,

Zenji Hiroi,

M. Takano

Publication year - 1996

Publication title -

osti oai (u.s. department of energy office of scientific and technical information)

Language(s) - English

Resource type - Reports

DOI - 10.2172/394414

Subject(s) - tetragonal crystal system , neutron diffraction , superconductivity , crystallography , crystal structure , materials science , powder diffraction , diffraction , x ray crystallography , high temperature superconductivity , delta , mineralogy , condensed matter physics , chemistry , physics , optics , astronomy

Average crystal structures of superconducting Sr{sub 2}CuO{sub 3+{delta}} synthesized at ambient pressure from a hydroxometallate precursor were refined from neutron powder diffraction data. A simplified model was used to fit the modulated superstructures. Both compounds have an oxygen deficient La{sub 2}CuO{sub 4}-type tetragonal T structure with O vacancies located in the CuO{sub 2} planes, not in the Sr{sub 2}O{sub 2} layers. This raises important questions about the superconductivity in Sr{sub 2}CuO{sub 3+{delta}} reported to be a 70 K superconductor

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