Enhancement of J(c) by doping silver in grain boundaries of YBa2Cu3Oy polycrystals with solid-state diffusion method

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Abstract
Grain boundaries (GBs) of YBa2Cu3Oy (YBCO) are preferentially doped with Ag by the solid-state diffusion method. The distribution of Ag is highly localized in the GB. As a result of the Ag doping, the Jc-H behavior of YBCO textured polycrystalline samples is significantly improved, and at 60 K and 7 T, Jc is tripled. It is proposed that Ag could partially replace the Cu in CuO2 planes near GBs, therefore reducing the geometric distortion of Cu-O bonds and making the effective GBs thinner.
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Cheng, CH
Zhao, Yong
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Publication Year
2003
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Journal Article
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UNSW Faculty
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