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

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Abstract

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.

Original languageEnglish
Pages (from-to)2839-2840
Number of pages2
JournalPhysica C: Superconductivity and its applications
Volume235-240
Issue numberPART 5
DOIs
Publication statusPublished - 1994 Dec

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ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

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