Influence of antiphase boundaries on critical current densities in YBa2Cu3O7-y single crystals

Junko Shibata, Akihiro Oka, Teruo Izumi, Yuh Shiohara, Tsukasa Hirayama, Yuichi Ikuhara

    Research output: Contribution to journalArticlepeer-review

    4 Citations (Scopus)


    Twinned and detwinned YBa2Cu3O7-y (Y123) single crystals were observed by transmission electron microscopy to investigate the influences of the lattice defects on the peak effect for Y123 single crystals. Twin boundaries with the spacing of 0.2-0.5 μm were seen only in the twinned Y123 single crystals. Antiphase boundaries (APBs) along the (110)Y123 plane were observed in both twinned and 0.5 h-detwinned samples, which showed the peak effect in high magnetic field over 3 T at 70 K. In contrast, APBs were not found in 100 h-detwinned sample. Critical current densities of this sample were small all over the range of the applied magnetic field. In conclusion, we suggest that APBs have a significant influence on the peak effect of Y123 single crystals in the high magnetic field.

    Original languageEnglish
    Pages (from-to)1935-1941
    Number of pages7
    JournalJournal of Materials Research
    Issue number7
    Publication statusPublished - 2001 Jul

    ASJC Scopus subject areas

    • Materials Science(all)
    • Condensed Matter Physics
    • Mechanics of Materials
    • Mechanical Engineering


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