An attempt to arrange bzo nanorods into erbco thin films

Takatoshi Yoshimoto, G. Goto, M. Mukaida, R. Terasnishi, N. Mori, K. Yamada, S. Funaki, Y. Yoshida, A. Ichinose, K. Matsumoto, S. Horii, R. Kita

    Research output: Contribution to journalArticlepeer-review


    We arrayed BaZrO3 (BZO) nanorods as artificial pinning centers (APCs) into ErBa2Cu3O7-s (ErBCO) thin films to obtain a higher critical current density (Jc) in a magnetic field. In order to array BZO nanorods in ErBCO thin films, Zr nanoislands were put on (STO) substrates as seeds for BZO nanorod growth by using an electron beam lithography (EBL) process, a pulsed laser deposition (PLD) method and a lift off process. After that, we grew ErBCO thin films with BZO nanorods by the PLD method. The Zr nanoislands, arrayed on the STO substrates, were successfully observed by atomic force microscopy (AFM). The Zr nanoislands were 60∼70 nm in diameter and 2∼3 nm in height. Density of the Zr nanoislands was 27.7μm-2. Through structural analysis using X-ray diffraction and transmission electron microscopy (TEM) observation, it was confirmed that the ErBCO thin films had c-axis orientation with BZO nanorods. After oxygen annealing process, a critical temperature (Tc) of the film was 88.7 K. Jc measurement of the film in a magnetic field revealed that Jc deterioration was suppressed by introduction of the BZO nanorods. However, a Jc increase at the approximate maTching field was not confirmed at around calculated from density of the Zr nanoislands.

    Original languageEnglish
    Article number5153182
    Pages (from-to)3420-3422
    Number of pages3
    JournalIEEE Transactions on Applied Superconductivity
    Issue number3
    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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