Superconducting properties and microstructure of PLD-ErBa 2Cu3O7-δ films with BaNb 2O6

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

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    Abstract

    We report superconducting properties and microstructures of ErBa 2Cu3O7-δ (ErBCO) films with BaNb 2O6 (BNO) grown by Pulsed Laser Deposition (PLD) on SrTiO3 (STO) substrates. The BNO was introduced into the ErBCO films as an artificial pinning center. X-ray diffraction analysis indicated the high orientation both c-axis and in-plane for the obtained ErBCO films. An ErBCO film with BNO-doping (BNO + ErBCO) maintained the high critical temperature (T C) comparison with an ErBCO film with BZO-doping (BZO + ErBCO). Nanorods were observed clearly in Transmission Electron Microscopy (TEM) images of the BNO+ErBCO films. The nanorod diameter was smaller with lower substrate temperature during deposition. The BNO + ErBCO films showed higher critical current density (JC) than that of a pure ErBCO film for field//c-axis. Furthermore, we confirmed a tendency that JC of the BNO+ErBCO films were enhanced with lower substrate temperature. This indicates that nanorods observed in cross-sectional TEM images affected as c-axis correlated pinning centers. We suggest that the BNO is effective as a pinning material for ErBCO film with maintaining high TC.

    Original languageEnglish
    Article number012143
    JournalJournal of Physics: Conference Series
    Volume97
    Issue number1
    DOIs
    Publication statusPublished - Feb 1 2008

    All Science Journal Classification (ASJC) codes

    • General Physics and Astronomy

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