The effects of growth temperature on c-axis-correlated pinning centers in PLD-ErBa2Cu3O7-δ films with Ba(Er 0.5Nb0.5)O3

H. Kai, S. Horii, A. Ichinose, R. Kita, K. Matsumoto, Y. Yoshida, T. Fujiyoshi, R. Teranishi, N. Mori, M. Mukaida

    研究成果: ジャーナルへの寄稿学術誌査読

    25 被引用数 (Scopus)

    抄録

    Effects of growth temperatures in epitaxial ErBa2Cu 3O7-δ films with one-dimensional nanorods were discussed from their microstructures and superconducting properties. c-axis-oriented BaNb2O6-doped ErBa2Cu 3O7-δ films were grown on (100)-oriented SrTiO 3 substrates grown at 710 and 760 °C by pulsed-laser deposition. Atomic force microscopy analysis showed that film surface steps on the three-dimensional islands increased with decreasing growth temperature (T S). Then, nanorod morphologies were also changed by TS. Ba(Er0.5Nb0.5)O3 nanorods were observed clearly in transmission electron microscopy images of the films. The nanorods were thinner and denser at a lower TS under a nominal BaNb 2O6 (BNO) doping concentration. In the case of T S = 710 °C, the diameter and number density of nanorods with 1.5wt%BNO doping were 4-6nm and 2.6 × 1011cm-2, respectively. Furthermore, the nanorods could effectively act as c-axis-correlated pinning centers in the film grown at a lower TS. Consequently, the pinning effects were controlled by nanorod morphologies through varying the TS.

    本文言語英語
    論文番号025017
    ジャーナルSuperconductor Science and Technology
    23
    2
    DOI
    出版ステータス出版済み - 2010

    !!!All Science Journal Classification (ASJC) codes

    • セラミックおよび複合材料
    • 凝縮系物理学
    • 金属および合金
    • 電子工学および電気工学
    • 材料化学

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