Impurity-doping effects on critical current properties in ErBa 2Cu3Oy films

S. Horii, Y. Ichino, Y. Yoshida, K. Matsumoto, T. Horide, M. Mukaida, A. Ichinose, R. Kita, J. Shimoyama, K. Kishio

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Abstract

    We report on the critical current properties of the BaZrO3(BZO)- and Co-doped ErBa2Cu3Oy thin films grown by the pulse laser deposition method. The BZO-doped Er123 films processed through the oxygen post-annealing showed clear enhancement of critical current density (Jc) in comparison with normal Er123 thin films. Even in the BZO doping level of 0.5 wt.% for Er123, TEM observation revealed that nano-rods of BZO were embedded in Er123 matrix, which was qualitatively consistent with a result of angular dependence of Jc at 77 K. The Tc values of the slightly Co-doped films depend on the substrate temperature, while irreversibility lines for the temperature normalized by Tc were almost coincident with one another, which were overlapped on that of the normal Er123 thin film. The positive Co-doping effect on Jc emerged at low temperatures. We believe that local regions with lower Tc, in which the Co doping levels in the CuO2 planes were relatively higher than that of matrix, act as vortex pinning centers.

    Original languageEnglish
    Title of host publicationElectroceramic Materials and Applications - Proceedings of the 6th Pacific Rim Conference on Ceramic and Glass Technology
    Pages57-65
    Number of pages9
    Publication statusPublished - Dec 1 2006
    Event6th Pacific Rim Conference on Ceramic and Glass Technology - Maui, Hawaii, United States
    Duration: Sep 11 2005Sep 16 2005

    Publication series

    NameCeramic Transactions
    Volume196
    ISSN (Print)1042-1122

    Other

    Other6th Pacific Rim Conference on Ceramic and Glass Technology
    Country/TerritoryUnited States
    CityMaui, Hawaii
    Period9/11/059/16/05

    All Science Journal Classification (ASJC) codes

    • Ceramics and Composites
    • Materials Chemistry

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