Formation mechanism of BaZrO3 nanorods in SmBa 2Cu3Oy thin films

Toshinori Ozaki, Yutaka Yoshida, Yusuke Ichino, Yoshiaki Takai, Ataru Ichinose, Kaname Matsumoto, Shigeru Horii, Masashi Mukaida, Yoshihiko Takano

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Abstract

In BaZrO3(BZO) doped REBa2Cu3O y(REBCO) films deposited by pulsed laser deposition, BZO nanorods grow almost parallel to c-axis in REBCO films. In this study, in order to understand the mechanism for the formation of BZO nanorods, we investigated the influence of the substrate temperature of the upper layer (T8 upper) in the low temperature growth (LTG) technique on the growth of BZO nanorods in SmBa2Cu3Oy(SmBCO) films. Furthermore, we discussed the diffusion process on BZO and estimated the activation energy for surface diffusion of constituent atoms in BZO. With decreasing T8upper, the diameter of BZO nanorods was decreased and the number density was increased. In addition, the angle of inclination of BZO nanords with respect to c-axis in SmBCO became larger with decreasing T8upper It is found that the diffusion process could be dominant in the nucleation of BZO. We attributed self-organized growth of BZO nanorods to the diffusion process as well as the strain energy resulting from a lattice mismatch between SmBCO and BZO.

Original languageEnglish
Pages (from-to)422-427
Number of pages6
JournalNippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals
Volume74
Issue number7
DOIs
Publication statusPublished - Jul 1 2010

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All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Mechanics of Materials
  • Metals and Alloys
  • Materials Chemistry

Cite this

Ozaki, T., Yoshida, Y., Ichino, Y., Takai, Y., Ichinose, A., Matsumoto, K., ... Takano, Y. (2010). Formation mechanism of BaZrO3 nanorods in SmBa 2Cu3Oy thin films. Nippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals, 74(7), 422-427. https://doi.org/10.2320/jinstmet.74.422