Crystal growth of ba concentration controlled ybco films by tfa-mod process

Ryo Teranishi, K. Tada, J. Yoshida, K. Yamada, N. Mori, M. Mukaida, K. Nakaoka, M. Miura, M. Yoshizumi, T. Izumi, Y. Shiohara

    Research output: Contribution to journalArticlepeer-review

    Abstract

    YBCO films grown by the starting solution with Ba-poor (cation ratio asY:Ba:Cu = l:1.5:3) have been reported to have higher Jc than that for YBCO films with stoichiometric composition due to smaller and less pores in TFA-MOD YBCO. In this study, Ba concentration in the Ba-poor YBCO films was controlled in film thickness direction, and influences of the Ba concentration gradient on microstructures and Jc properties were investigated to realize higher Jc. Precursor films with Ba-poor composition and with Ba-rich composition in the thickening direction were prepared and then the films were crystallized. Increasing the Ba concentration in thickening direction led to higher Jc than that of Ba-poor YBCO. Cross sectional TEM observations showed that the effective YBCO thickness increased for YBCO film with higher Ba concentration in comparison to the previous Ba-poor YBCO film

    Original languageEnglish
    Article number5153151
    Pages (from-to)3200-3203
    Number of pages4
    JournalIEEE Transactions on Applied Superconductivity
    Volume19
    Issue number3
    DOIs
    Publication statusPublished - Jun 2009

    All Science Journal Classification (ASJC) codes

    • Electronic, Optical and Magnetic Materials
    • Condensed Matter Physics
    • Electrical and Electronic Engineering

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