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

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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 T c of 94 K.

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  1. Science and Technology Center for Superconductivity and Materials Science Division, Argonne National Laboratory, Argonne, Illinois, 60439, USA

    Dimitri N. Argyriou, Julie A. Garcia, John F. Mitchell, J. D. Jorgensen & D. G. Hinks

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  1. Dimitri N. Argyriou
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  2. Julie A. Garcia
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  3. John F. Mitchell
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  4. J. D. Jorgensen
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  5. D. G. Hinks
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Argyriou, D.N., Garcia, J.A., Mitchell, J.F. et al. Phase development of Bi-2212 superconductor: A time-resolved neutron powder diffraction investigation. Journal of Materials Research 11, 277–280 (1996). https://doi.org/10.1557/JMR.1996.0032

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  • DOI: https://doi.org/10.1557/JMR.1996.0032

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