Effect of BaZrO3 addition and film growth on superconducting properties of (Nd, Eu, Gd)Ba2Cu3Oy thin films

Yusuke Ichino, Yutaka Yoshida, Kouichi Inoue, Toshinori Ozaki, Yoshiaki Takai, Kaname Matsumoto, Masashi Mukaida, Ryusuke Kita, Ataru Ichinose, Shigeru Horii

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We report that (Nd, Eu, Gd)Ba2Cu3Oy (NEG) films grown by low temperature growth (LTG) technique exhibit excellent superconducting properties in magnetic fields. In this study, we aim to improve the superconducting properties of NEG films by means of a modified LTG technique (mLTG) in which the surface of a highly c-axis oriented NEG seed layer is decorated by BaZrO3 (BZO) nanodots and an NEG upper layer on the seed layer is deposited at relatively low substrate temperature by using a BZO doped NEG123 target. From magnetic field and angular dependence of Jc, even Jc peak around,B//c-axis of an LTG-NEG films including BZO was larger than that of LTG-NEG without BZO. Furthermore, the mLTG-NEG films showed larger Jc peak than the LTG-NEG films with BZO and the Jc peak increased with increasing the BZO nanodots density. TEM images clarified that these films included BZO nanorods with a diameter of 5∼10 nm and the number density increased by introducing the BZO nanodots. Therefore, we concluded that the mLTG enabled to improve the superconducting properties due to control the configuration of BZO nanorods in the films.

Original languageEnglish
Article number5153241
Pages (from-to)3144-3147
Number of pages4
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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    Ichino, Y., Yoshida, Y., Inoue, K., Ozaki, T., Takai, Y., Matsumoto, K., Mukaida, M., Kita, R., Ichinose, A., & Horii, S. (2009). Effect of BaZrO3 addition and film growth on superconducting properties of (Nd, Eu, Gd)Ba2Cu3Oy thin films. IEEE Transactions on Applied Superconductivity, 19(3), 3144-3147. [5153241]. https://doi.org/10.1109/TASC.2009.2018207