Large fishtail effect in DyBa2Cu3O7-δ single crystals containing columnar defects

M. R. Koblischka, A. J.J. van Dalen, Th Schuster, M. Leghissa, M. Jirsa

研究成果: Article査読

6 被引用数 (Scopus)

抄録

Using capacitance torque magnetometry, hysteresis loops were measured on a Pb-ion irradiated DyBa2Cu3O7-δ single crystal as a function of magnetic field, temperature and angle Θ between the field direction and the c axis of the sample. The superconducting current densities, jc (T, B, Θ), determined using the extended Bean model, show a clear fishtail effect at temperatures above 30 K despite the large enhancement of jc due to the columnar tracks. The enhancement of jc due to irradiation was magneto-optically determined to jc(φt)/jc(0) = 10 at T = 30 K. The pinning energy U0 is, however, only slightly increased by the irradiation. Our measurements indicate clearly that the fishtail effect is a general feature of the high-Tc superconductors and not related to a special arrangement of pinning centres.

本文言語English
ページ(範囲)2839-2840
ページ数2
ジャーナルPhysica C: Superconductivity and its applications
235-240
PART 5
DOI
出版ステータスPublished - 1994 12
外部発表はい

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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