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Effect of bismuth replacement at barium site in Y-Ba-Cu-O system

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Abstract

X-ray diffraction, electron paramagnetic resonance, microwave absorption and resistivity measurements were carried out on YBa2−x Bi x Cu3O7 (0≤x≤0·5) superconductors in order to study the effect of bismuth on the structural and superconducting properties. A decrease in sintering temperature increased the amount of impurity phase. Transition from an orthorhombic (superconducting) phase to tetragonal structure produced no significant change in EPR zero-field signal at liquid nitrogen temperature (LNT). The non-resonance signal height decreased on higher concentration of bismuth. Sintered YBa2−x Bi x Cu3O7 superconductor had a strong EPR zero-field signal at LNT. We have evaluated particle size from XRD and EPR studies. The average particle size was about 0·4µm.

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Authors and Affiliations

  1. Department of Physics, Indian Institute of Technology, 208 016, Kanpur, India

    Ram Bilas

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  1. Ram Bilas
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Bilas, R. Effect of bismuth replacement at barium site in Y-Ba-Cu-O system. Bull. Mater. Sci. 16, 109–116 (1993). https://doi.org/10.1007/BF02745326

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  • DOI: https://doi.org/10.1007/BF02745326

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