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Phase development of Bi-2212 superconductor: A time-resolved neutron powder diffraction investigation

Published online by Cambridge University Press:  31 January 2011

Dimitri N. Argyriou ,
Julie A. Garcia ,
John F. Mitchell ,
J. D. Jorgensen  and
D. G. Hinks
Dimitri N. Argyriou
Affiliation:
Science and Technology Center for Superconductivity and Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439
Julie A. Garcia
Affiliation:
Science and Technology Center for Superconductivity and Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439
John F. Mitchell
Affiliation:
Science and Technology Center for Superconductivity and Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439
J. D. Jorgensen
Affiliation:
Science and Technology Center for Superconductivity and Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439
D. G. Hinks
Affiliation:
Science and Technology Center for Superconductivity and Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439
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Abstract

Time-resolved in situ neutron powder diffraction and Rietveld refinement have been used to study the synthesis of Bi-2212 from hydroxide precursors in a 2% O2 atmosphere. Bi-2212 was found to form within the temperature range 770–800 °C. Studies at 800 °C show that Bi-2212 grows rapidly at the expense of Bi-2201. Upon lowering the temperature to 500 °C and changing the atmosphere to Ar, a rapid increase in the lattice parameters was observed. We attribute this change to the loss of oxygen from the Bi-2212 lattice. The final material exhibited a Tc of 94 K.

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Articles
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Journal of Materials Research , Volume 11 , Issue 2 , February 1996 , pp. 277 - 280
Copyright
Copyright © Materials Research Society 1996

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