Angular dependence of critical current properties in YBCO coated tape under high magnetic field up to 18 T

T. Kiss, M. Inoue, S. Nishimura, T. Kuga, T. Matsushita, Y. Iijima, K. Kakimoto, T. Saitoh, S. Awaji, K. Watanabe, Y. Shiohara

Research output: Contribution to journalArticlepeer-review

37 Citations (Scopus)

Abstract

Critical current properties in a YBCO coated tape have been studied as a function of temperature, magnetic field and field angle under high magnetic field up to 18 T. 1 μm thick YBCO film was deposited on a bi-axially aligned Y2O3/YSZ/Hastelloy substrate fabricated by the IBAD technique. The value of critical current, Ic, of the 1 cm wide tape reached as high as 85 A at 77 K in self-field condition. After etching the tape into 100 μm wide and 1 mm long bridge, we measured extended E-J characteristics. The value of critical current density, Jc, is maintained higher than 105 A/cm2 at 70 K in 5 T perpendicular to the tape surface. Moreover, the power index n and the so called glass-liquid transition field, BGL, of the tape in perpendicular field are superior to those of epitaxial film deposited on a SrTiO3 single crystalline substrate. Jc vs. angle relationship shows broad peak around 90° where field is perpendicular to the tape surface, in addition to a sharp peak at 0°. These results suggest that the tape is highly uniform and correlated defects along c-axis direction contribute to flux pinning.

Original languageEnglish
Pages (from-to)1113-1117
Number of pages5
JournalPhysica C: Superconductivity and its Applications
Volume378-381
Issue numberPART 2
DOIs
Publication statusPublished - 2002 Oct

Keywords

  • Angular dependence
  • Critical current
  • Pinning
  • Superconducting tape
  • YBCO

Fingerprint

Dive into the research topics of 'Angular dependence of critical current properties in YBCO coated tape under high magnetic field up to 18 T'. Together they form a unique fingerprint.

Cite this