Superconducting properties of ErBCO films with BaMO 3 nanorods (M = Zr and Sn) by pulsed laser deposition

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

研究成果: Article査読

16 被引用数 (Scopus)

抄録

Ba complex oxides such as BaMO 3 (BMO, M = Zr and Sn) were incorporated into ErBa 2 Cu 3 O 7-δ (ErBCO) films on SrTiO 3 (STO) substrates for realizing higher critical current densities (J c ) in magnetic fields. Nanorods of BMO were formed in the ErBCO films with the rod diameter of about 10-20 nm. Crystal grain alignment of both ErBCO films with BZO and BSO were found to be worse with increasing the doping concentration of BMO into the films, resulting in critical temperature (T c ) degradation for the ErBCO films. J c of the ErBCO films were enhanced by the corporation of these BMO nanorods in the magnetic fields (B) applied particularly parallel to the c-axis (B//c). Additionally, it was observed that the J c values of the ErBCO films with BSO were higher than those of ErBCO films with BZO in the all measured magnetic fields (B//c), which indicated that the BSO nanorods acted as more effective pinning centers in ErBCO films. Extremely high J c of 0.41 MA/cm 2 was performed for the ErBCO film with BSO of 4.9 mol% in the magnetic field (B//c) of 3 T. We concluded that not only the decision of pinning materials, but also optimization of the three factors of crystallinity of the superconducting film, T c of the superconducting film, and doping concentration of the pinning materials into the superconducting film were important to realize higher J c in a magnetic field.

本文言語English
ページ(範囲)1522-1526
ページ数5
ジャーナルPhysica C: Superconductivity and its applications
468
15-20
DOI
出版ステータスPublished - 2008 9月 15

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学
  • エネルギー工学および電力技術
  • 電子工学および電気工学

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