TY - JOUR
T1 - Critical current properties in YBCO coated IBAD tapes
AU - Inoue, M.
AU - Nishimura, S.
AU - Kuga, T.
AU - Kiuchi, M.
AU - Kiss, T.
AU - Takeo, M.
AU - Matsushita, T.
AU - Iijima, Y.
AU - Kakimoto, K.
AU - Saitoh, T.
AU - Awaji, S.
AU - Watanabe, K.
AU - Shiohara, Y.
N1 - Funding Information:
This work was supported by the New Energy and Industrial Technology Development Organization (NEDO) as Collaborative Research and Development of Fundamental Technologies for Superconductivity Applications.
Copyright:
Copyright 2008 Elsevier B.V., All rights reserved.
PY - 2002/8
Y1 - 2002/8
N2 - Current transport properties in YBCO coated ion beam assisted deposition tapes have been studied as a function of temperature, magnetic field and field angle under high magnetic fields up to 18 T. The value of critical current, Ic, for 1 cm wide tape was 85 A at 77.3 K in self-field. Detailed properties of critical current density, Jc, were studied using 100 μm wide and 1 mm long bridge patterned in the tape. The results were compared with the properties of epitaxial YBCO thin films deposited on SrTiO3 single crystalline substrate. The value of critical current density, Jc, was maintained higher than 105 A/cm2 at 70 K in 5 T perpendicular to the tape surface. The value is ≈ 1/4 of Jc value in epitaxial thin film. In higher magnetic field, the difference becomes smaller. Power E-J relationship was observed over wide range of temperature and magnetic field. The power index n were superior to those of epitaxial thin films. And, the so-called glass-liquid transition field, BGL, of the coated tape was also superior to that of epitaxial thin films. Angle dependences of Jc showed a broad peak around 90° (∥c), in addition to a sharp peak at 0° (⊥c). These results suggest that correlated defects along c-axis direction contribute as pinning sites.
AB - Current transport properties in YBCO coated ion beam assisted deposition tapes have been studied as a function of temperature, magnetic field and field angle under high magnetic fields up to 18 T. The value of critical current, Ic, for 1 cm wide tape was 85 A at 77.3 K in self-field. Detailed properties of critical current density, Jc, were studied using 100 μm wide and 1 mm long bridge patterned in the tape. The results were compared with the properties of epitaxial YBCO thin films deposited on SrTiO3 single crystalline substrate. The value of critical current density, Jc, was maintained higher than 105 A/cm2 at 70 K in 5 T perpendicular to the tape surface. The value is ≈ 1/4 of Jc value in epitaxial thin film. In higher magnetic field, the difference becomes smaller. Power E-J relationship was observed over wide range of temperature and magnetic field. The power index n were superior to those of epitaxial thin films. And, the so-called glass-liquid transition field, BGL, of the coated tape was also superior to that of epitaxial thin films. Angle dependences of Jc showed a broad peak around 90° (∥c), in addition to a sharp peak at 0° (⊥c). These results suggest that correlated defects along c-axis direction contribute as pinning sites.
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U2 - 10.1016/S0921-4534(02)00909-7
DO - 10.1016/S0921-4534(02)00909-7
M3 - Article
AN - SCOPUS:0042022550
SN - 0921-4534
VL - 372-376
SP - 794
EP - 797
JO - Physica C: Superconductivity and its applications
JF - Physica C: Superconductivity and its applications
IS - PART 2
ER -