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Barium Potassium Bismuth Oxide Synthesis and Physical Properties

Published online by Cambridge University Press:  21 February 2011

K. C. Ott ,
M. F. Hundley ,
G. H. Kwei ,
M. P. Maley ,
M. E. McHenry ,
E. J. Peterson ,
J. D. Thompson  and
J. O. Willis
K. C. Ott
Affiliation:
Los Alamos National Laboratory, Los Alamos, NM 87545.
M. F. Hundley
Affiliation:
Los Alamos National Laboratory, Los Alamos, NM 87545.
G. H. Kwei
Affiliation:
Los Alamos National Laboratory, Los Alamos, NM 87545.
M. P. Maley
Affiliation:
Los Alamos National Laboratory, Los Alamos, NM 87545.
M. E. McHenry
Affiliation:
Los Alamos National Laboratory, Los Alamos, NM 87545.
E. J. Peterson
Affiliation:
Los Alamos National Laboratory, Los Alamos, NM 87545.
J. D. Thompson
Affiliation:
Los Alamos National Laboratory, Los Alamos, NM 87545.
J. O. Willis
Affiliation:
Los Alamos National Laboratory, Los Alamos, NM 87545.
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Abstract

A series of compounds Ba1−xKxBiO3 have been prepared and characterized over the range of compositions ranging from x = 0.3 to 0.5. A neutron powder diffraction analysis has been carried out for the composition x = 0.4 at room temperature and at 10 K. Examination of the superconducting properties as a function of x indicates superconductivity occurs over a narrow range of compositions close to x = 0.4, with Tc of 29 K. Specific heat measurements indicate conventional electron-phonon interactions may play a role in promoting superconductivity in Ba.6K.4BiO3. Magnetization loops and examination of the time dependent magnetization indicate that Ba.6K.4BiO3 has a low value of Jc due to very weak pinning.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 156: Symposium M – High Temperature Superconductors: Relationships Between Properties, Structure, and Solid State Chemistry , 1989 , 369
Copyright
Copyright © Materials Research Society 1989

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References

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